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1. Measurement of the masses and widths of the Σc(2455)+ and Σc(2520)+ baryons

Author: S-H Park, B. G. Cheon, Seema Bahinipati, T. V. Dong, M. Takizawa, Y. Choi, S. Das, T. Hara, J. V. Bennett, Y. Tao, S. Al Said, L. Santelj, H. Aihara, S. E. Vahsen, M. Uchida, L. K. Li, D. Liventsev, G. S. Varner, Y. Usov, R. Itoh, A. Rostomyan, P. Wang, Zhukova, K. Gudkova, K. Belous, L. Nayak, John Yelton, S. Korpar, D. Matvienko, Gaur, O. Hartbrich, Y. Iwasaki, U. Tamponi, N. Dash, T. Aushev, K. Senyo, S. Pardi, R. B. Garg, A. Chen, B. Bhuyan, G. De Nardo, A. Korobov, M. Sumihama, M. Niiyama, N. Rout, Motoki Iwasaki, T. Ferber, Chekelian, B. G. Fulsom, J-G Shiu, G. Schnell, S. Jia, S. Uno, C. Schwanda, T. E. Browder, Z. P. Zhang, R. Mizuk, S. Cunliffe, M. Shapkin, Andrey Sokolov, G. De Pietro, M. Laurenza, K. Chilikin, P. Goldenzweig, T. Matsuda, A. Sangal, T. Kuhr, S. Sandilya, Shih-Chang Lee, I. Adachi, M. C. Chang, Jyoti Prakash Biswal, Babu, M. Merola, Antonio Budano, Phillip Urquijo, T. Gu, Y-J Kwon, R. Kroeger, M. E. Sevior, P. Krizan, K. Kumara, M. Nakao, R. Pestotnik, M. Nayak, Ya-Qiu Jin, M. Starič, Y. B. Li, R. Dhamija, Seongbae Yang, D Wang, C.-L. Hsu, A. Vinokurova, C. Hadjivasiliou, C. H. Wang, Z. S. Stottler, L. E. Piilonen, Bruce Yabsley, K. Tanida, T. Uglov, P. Pakhlov, E. Wang, Y. Onuki, G. Pakhlova, P. Oskin, R. Kulasiri, W-S Hou, S. Paul, L. Li Gioi, C. Z. Yuan, E. Prencipe, P. Krokovny, C. Sharma, Peter Kodys, S-J Cho, J. Li, W. W. Jacobs, K. Trabelsi, H. Ye, Y. Sakai, K. H. Kang, K. Cho, S. K. Choi, T. J. Moon, K. T. Kim, D. Cinabro, C. P. Shen, Zdenek Dolezal, Seok Kim, H. Park, T. Konno, A. Bozek, K. Lieret, Martin Florian Bessner, R. Ayad, N. Gabyshev, D. Červenkov, D. Epifanov, A. Garmash, P. Branchini, D. Y. Kim, K. Sumisawa, S. Nishida, D. M. Asner, T. K. Pedlar, Zhilich, P. K. Behera, F. Tenchini, A. K. Giri, E. Solovieva, P. Chang, T. Podobnik, T. Sumiyoshi, Yk Kim, K. Hayasaka, R. Mussa, T. Sanuki, M. Masuda, R. Van Tonder, G. B. Mohanty, A. Ishikawa, H. E. Cho, Doyen Sahoo, S. Ogawa, Somnath Choudhury, W. B. Yan, E. Waheed, Z. Natkaniec, J. Libby, E. Kovalenko, Y. Seino, M. T. Prim, Shoichi Watanuki, T. Bilka, M. Watanabe, J. C. Dingfelder, F. Di Capua, K. K. Joo, A. B. Kaliyar, J. Schueler, E. Won, C. MacQueen, J. K. Ahn, H. Atmacan, G.V. Russo, E. Graziani, J. H. Yin, M. Campajola, Y. Kato, D. Ferlewicz, N. K. Nisar, Bhardwaj, J. S. Lange, K. Miyabayashi, C. Kiesling, M. Bračko, H. Ono, Y. Unno, H. Hayashii, C. H. Kim, M. Z. Wang, K. Kinoshita, Aulchenko, A. Natochii, K. Inami, Savinov, and J. T. McNeil
Subjects: Physics, Quark, Particle physics, 010308 nuclear & particles physics, Sigma, Lambda, 01 natural sciences, law.invention, Baryon, Charmed baryons, KEKB, law, 0103 physical sciences, 010306 general physics, Collider
Abstract: Using 980 ${\rm fb}^{-1}$ of data {collected} with the Belle detector operating at the KEKB asymmetric-energy $e^+e^-$ collider, we report the measurements of the masses, and the first measurements of the instrinsic widths, of the $\Sigma_c(2455)^+$ and $\Sigma_c(2520)^+$ charmed baryons. We find $M(\Sigma_c(2455)^+)-M(\Lambda_c^+) = 166.17\pm 0.05^{+0.16}_{-0.07}\ {\rm MeV}/c^2$, $\Gamma(\Sigma_c(2455)^+) = 2.3 \pm 0.3 \pm 0.3\ {\rm MeV/c^2}$, $M(\Sigma_c(2520)^+)-M(\Lambda_c^+) = 230.9 \pm 0.5 ^{+0.5}_{-0.1}\ {\rm MeV}/c^2$, and $\Gamma(\Sigma_c(2520)^+) = 17.2^{+2.3\ +3.1}_{-2.1\ -0.7}\ {\rm MeV}/c^2$, where the uncertainties are statistical and systematic, respectively. These measurements can be used to test models of the underlying quark structure of the $\Sigma_c$ states.
Published: 2021
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2. First determination of the spin and parity of the charmed-strange baryon Ξc(2970)+

Author: R. Mizuk, K. Chilikin, K. T. Kim, Y Choi, C. Beleño, Y. Kato, D. M. Asner, Pavel Krokovny, D. Dossett, K. Hayasaka, W. Sutcliffe, Zhukova, Y. Seino, J. Libby, D. Epifanov, K. Miyabayashi, D Cinabro, K. Trabelsi, B. Golob, A. Garmash, S. Wehle, A. Sangal, G. Varner, M. Uchida, Y. I. Kim, Leo Piilonen, C. P. Shen, F. Di Capua, H. Miyata, Takeo Kawasaki, A. K. Giri, K. Sumisawa, BG Cheon, T. J. Moon, J. S. H. Lee, N. K. Nisar, Babu, Z. Liptak, M. Niiyama, P Behera, A. Vossen, T. D. Kimmel, M. Masuda, T. K. Pedlar, S. Al Said, J. Biswal, Zhulanov, M. Nayak, P. Wang, H Aihara, L. K. Li, G. Schnell, T. V. Dong, T. Bilka, R. Kroeger, J. Schueler, Seongbae Yang, H. Ono, Saraju P. Mohanty, GB Mohanty, Vorobyev, E. Prencipe, D. Liventsev, TE Browder, P. Chang, U. Tamponi, C.-L. Hsu, K. K. Joo, S-H Park, Yongsun Kim, K. Senyo, C. Schwanda, S. Cunliffe, B. G. Fulsom, S. Jia, D. Matvienko, R. Itoh, X. P. Xu, A. Bozek, Peter Kodys, W. W. Jacobs, T. Matsuda, Zdenek Dolezal, T. Kuhr, M Iwasaki, Yang Li, S. Paul, R. Mussa, T. Ferber, Tao Luo, K. Tanida, S. K. Kim, A. Kuzmin, D. Kotchetkov, S. Uno, S Choudhury, L. Cao, S. C. Lee, M. Takizawa, C. MacQueen, G. Karyan, J. K. Ahn, L. Santelj, G. Bonvicini, Aulchenko, A. Ishikawa, M. Nakao, L. Li Gioi, John Yelton, Gaur, Samo Korpar, A. Vinokurova, S. Dubey, Y. Sakai, H. Kichimi, Rocky Bala Garg, F. Tenchini, O. Hartbrich, Zhiqing Zhang, Chunjie Wang, S. Patra, T. Podobnik, S. Pardi, T. Sumiyoshi, P. Krizan, S Ogawa, E. Wang, M. Campajola, Rakesh Kumar, M Merola, K. H. Kang, J. Wiechczynski, B.A. Shwartz, Y. Unno, Martin Ritter, R. Ayad, K. Cho, Seema Bahinipati, C. Hadjivasiliou, Bruce Yabsley, S. Nishida, G. De Nardo, M. T. Hedges, Y-J Kwon, K. Kumara, Y. Jin, T. Uglov, W-S Hou, Phillip Urquijo, M. E. Sevior, I. S. Lee, Savinov, Zhilich, P. Goldenzweig, M. Sumihama, I. Adachi, N. Dash, T. Mori, E. Solovieva, DY Kim, Semen Eidelman, J. H. Yin, G. Inguglia, K Kinoshita, R. Seidl, C. Kiesling, B. H. Kim, C. Z. Yuan, M. Bračko, Tagir Aushev, M. C. Chang, G. Pakhlova, S. K. Choi, S. Sandilya, Z. Natkaniec, S. E. Vahsen, Y. Iwasaki, S. Uehara, N. Rout, N. Gabyshev, D. Červenkov, M. Z. Wang, Martin Florian Bessner, H Ye, J. Bennett, S. H. Kim, M. Shapkin, H. Hayashii, R. Pestotnik, Dipak Kumar Sahoo, Popov, Kohei Ogawa, A. Chen, A. Natochii, K. Inami, M. T. Prim, T. Nakano, P. Pakhlov, G. Russo, H. Park, R. Van Tonder, B. Bhuyan, and J-G Shiu
Subjects: Quark, Physics, Particle physics, 010308 nuclear & particles physics, Branching fraction, Parity (physics), 01 natural sciences, Baryon, KEKB, Angular distribution, Condensed Matter::Superconductivity, 0103 physical sciences, High Energy Physics::Experiment, 010306 general physics
Abstract: We report results from a study of the spin and parity of $\Xi_{c}(2970)^+$ using a $980~\mathrm{fb^{-1}}$ data sample collected by the Belle detector at the KEKB asymmetric-energy $e^{+}e^{-}$ collider. The decay angle distributions in the chain $\Xi_{c}(2970)^+ \to \Xi_c(2645)^{0}\pi^{+} \to \Xi_c^{+}\pi^{-}\pi^{+}$ are analyzed to determine the spin of this charmed-strange baryon. The angular distributions strongly favor the $\Xi_{c}(2970)^+$ spin $J =1/2$ over $3/2$ or $5/2$, under an assumption that the lowest partial wave dominates in the decay. We also measure the ratio of $\Xi_{c}(2970)^+$ decay branching fractions $R={\mathcal{B}[ \Xi_{c}(2970)^+ \to \Xi_c(2645)^{0}\pi^{+} ]} / { \mathcal{B}[ \Xi_{c}(2970)^+ \to \Xi_c^{\prime0}\pi^{+} ]} =1.67 \pm 0.29\mathrm{(stat.)}^{ +0.15}_{ -0.09}\mathrm{(syst.)} \pm 0.25\mathrm{(IS)}$, where the last uncertainty is due to possible isospin-symmetry-breaking effects. This $R$ value favors the spin-parity $J^P=1/2^+$ with the spin of the light-quark degrees of freedom $s_{l}=0$. This is the first determination of the spin and parity of a charmed-strange baryon.
Published: 2021
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3. Measurements of the branching fractions ofΛc+→pηandΛc+→pπ0decays at Belle

Author: Jyoti Prakash Biswal, S. Eidelman, P. Pakhlov, P. Goldenzweig, S. Cunliffe, S. Sandilya, M. Sumihama, Martin Florian Bessner, Motoki Iwasaki, M. C. Chang, M. Nakao, H. Park, A. Bozek, D. Epifanov, Soumya D. Mohanty, S-H Park, A. Ishikawa, B. H. Kim, Doyen Sahoo, E. Wang, T. Pang, M. Takizawa, D. Y. Kim, C. Z. Yuan, R. Mizuk, D. M. Asner, F. Di Capua, T. K. Pedlar, Y. Sakai, A. Chen, I. Adachi, K. Hayasaka, A. Bobrov, H. E. Cho, R. B. Garg, B. Bhuyan, B. G. Fulsom, J-G Shiu, G.V. Russo, K. Lieret, T. E. Browder, Y-J Kwon, Florian Urs Bernlochner, Z. P. Zhang, J. K. Ahn, A. Korobov, L. Nayak, W-S Hou, E. Prencipe, Zhulanov, R. Dhamija, L. E. Piilonen, G. Pakhlova, Shebalin, Alexei Kuzmin, T. Aushev, John Yelton, C.-L. Hsu, R. Kroeger, M. E. Sevior, I. S. Lee, R. Ayad, P. Krizan, M. Uchida, L. K. Li, Phillip Urquijo, Y. Yusa, C. Sharma, Peter Kodys, W. W. Jacobs, M. Campajola, S. Uehara, Shih-Chang Lee, T. Ferber, G. Schnell, T. Iijima, T. Uglov, C. W. Joo, K. Tanida, Y. Kato, D. Ferlewicz, Zhilich, D. Liventsev, E. Solovieva, S. Nishida, Zdenek Dolezal, G. De Nardo, M. Niiyama, Y. Iwasaki, H. Ono, T. Matsuda, Y. B. Li, A. B. Kaliyar, M. T. Hedges, S. Das, G. Karyan, T. Konno, K. Lalwani, T. Kuhr, G. S. Varner, B. Shwartz, Seongbae Yang, J. V. Bennett, Y. Tao, S. Uno, C. Schwanda, H. Kichimi, T. Mori, H. Aihara, A. Vossen, J. Schueler, R. Van Tonder, N. Rout, A. K. Giri, Yk Kim, F. Tenchini, T. Podobnik, T. Sumiyoshi, M. Shapkin, K. Kumara, A. Natochii, M. Masuda, K. Inami, Savinov, E. Won, R. Itoh, B. G. Cheon, E.-J. Jang, M. Röhrken, K. Chilikin, W. Sutcliffe, Y. Onuki, Z. S. Stottler, A. Garmash, A. Rostomyan, P. Wang, Zhukova, Seema Bahinipati, T. V. Dong, T. Sanuki, T. Bilka, SX Li, P. Krokovny, L. Cao, Y. Choi, M. Z. Wang, K. Kinoshita, K. Gudkova, X. P. Xu, K. H. Kang, K. Cho, Popov, L. Santelj, Sudhanwa Patra, K. Trabelsi, C. H. Li, Ya-Qiu Jin, S. Korpar, R. Pestotnik, C. P. Shen, Seok Kim, N. Dash, A. Sangal, P. K. Behera, D. Matvienko, Mukesh Kumar, H. Hayashii, Gaur, O. Hartbrich, Babu, M. Merola, K. Senyo, J. H. Yin, C. H. Kim, T. Kawasaki, S. Jia, K. T. Kim, W. B. Yan, C. Hadjivasiliou, Z. Natkaniec, B. Golob, O. Grzymkowska, C. H. Wang, S. Paul, L. Li Gioi, Felix Metzner, N. K. Nisar, H. Ye, Bhardwaj, J. S. Lange, K. Uno, K. K. Joo, S. Pardi, Bruce Yabsley, D. Cinabro, G. Inguglia, Somnath Choudhury, J. Libby, E. Kovalenko, Y. Seino, M. T. Prim, and Shoichi Watanuki
Subjects: Quark, Physics, Particle physics, Luminosity (scattering theory), 010308 nuclear & particles physics, Branching fraction, Branching (polymer chemistry), 01 natural sciences, law.invention, KEKB, law, 0103 physical sciences, Invariant mass, 010306 general physics, Collider
Abstract: We report measurements of the branching fractions of singly Cabibbo-suppressed decays Λc+→pη and Λc+→pπ0 using the full Belle data sample corresponding to an integrated luminosity of 980.6 fb-1. The data were collected by the Belle detector at the KEKB e+e- asymmetric energy collider. A clear Λc+ signal is seen in the invariant mass distribution of pη. The fitted number of signal events of the Λc+→pη process is 7734±263; from this, we measure the ratio of branching fractions B(Λc+→pη)/B(Λc+→pK-π+)=[2.258±0.077(stat)±0.122(syst)]×10-2, from which we infer the branching fraction B(Λc+→pη)=[1.42±0.05(stat)±0.11(syst)]×10-3. In addition, no significant signal for Λc+→pπ0 is found, so an upper limit on the branching fraction of B(Λc+→pπ0)
Published: 2021
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4. Search for B0 decays to invisible final states ( +γ ) at Belle

Author: K. Arinstein, J. Libby, Y. Chao, S. Nishida, A.E. Bondar, Y. Teramoto, C. Ng, K. Senyo, K. Miyabayashi, V. Chekelian, Z. P. Zhang, V. Gaur, M. Shapkin, A.L. Sibidanov, Y. Choi, Z. Doležal, H. O. Kim, S. Uno, Sunmin Ryu, Norihito Muramatsu, E. Nakano, B.A. Shwartz, E. Solovieva, K. T. Kim, H. Miyata, M. Bischofberger, Toru Iijima, T. E. Browder, M. C. Chang, T. Iwashita, G. Varner, Y. Hoshi, R. Gillard, D. M. Asner, G. Tatishvili, Hitoshi Yamamoto, P. Vanhoefer, Peter Kodys, M. Röhrken, K. Chilikin, J. B. Singh, K. Hayasaka, S. E. Vahsen, Jochen Dingfelder, A. Ishikawa, M. Nakao, H. Farhat, C. W. Park, Vladimir Zhulanov, E. Won, H. K. Park, J. Dalseno, Leo Piilonen, M. Iwabuchi, M. E. Sevior, A. Kuzmin, Y. Iwasaki, V. Zhilich, W. S. Hou, O. Schneider, R. Louvot, Frank Simon, H. Park, A. Bozek, Phillip Urquijo, G. B. Mohanty, S. Okuno, Peter Kvasnicka, R. Pestotnik, T. Kawasaki, H. J. Kim, M. Ritter, Y. Usov, T. A. Shibata, V. Vorobyev, J. Li, G. Bonvicini, S. H. Lee, I. Adachi, Z. Drásal, T. Kuhr, S. Esen, B. Bhuyan, Y. S. Sohn, Yasuyuki Horii, C. L. Hsu, M. Uchida, G. Pakhlova, A. M. Bakich, S. Sandilya, D. Liventsev, A. J. Schwartz, Marko Petrič, Hiroaki Aihara, Yang Li, Y. Sakai, T. Julius, Po-Hsun Chen, Yongsun Kim, C. Schwanda, H. J. Hyun, P. Smerkol, H. Sahoo, T. Hara, K. Cho, T. Uglov, J. Haba, R. Itoh, P. Chang, P. Wang, Z. Q. Liu, J. H. Kang, D. Epifanov, Pavel Krokovny, B. G. Cheon, Jung-Hyun Kim, Y. Miyazaki, I. S. Cho, Y. M. Goh, T. Sumiyoshi, James E. Fast, T. K. Pedlar, A. Moll, S. L. Olsen, Samo Korpar, K. M. Williams, T. Sanuki, Semen Eidelman, H. Kichimi, A. Chen, Y. Unno, K. Trabelsi, K. Inami, C. P. Shen, M. Sumihama, B. R. Ko, O. Nitoh, H. Hayashii, Y. B. Hsiung, D. Dutta, M. Watanabe, M. Starič, Y. Watanabe, J. G. Shiu, Tagir Aushev, Y. Yamashita, V.M. Aulchenko, Yueh-Feng Liu, Z. Natkaniec, T. Ohshima, N. Gabyshev, C. Kiesling, M. Bračko, J. B. Kim, Samo Stanič, and Y. J. Kwon
Subjects: Physics, Particle physics, Photon, 010308 nuclear & particles physics, Electron–positron annihilation, Resonance, Photon energy, 01 natural sciences, law.invention, Nuclear physics, KEKB, law, 0103 physical sciences, 010306 general physics, Collider
Abstract: We report searches for B0→invisible and B0→invisible+γ decays, where the energy of the photon is required to be larger than 0.5 GeV. These results are obtained from a 711 fb-1 data sample that contains 772×106BB¯ pairs and was collected near the ϒ(4S) resonance with the Belle detector at the KEKB e+e- collider. We observe no significant signal for either decay and set upper limits on their branching fractions at 90% confidence level of B(B0→invisible)
Published: 2020
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5. Measurement of R(D) and R(D*) with a Semileptonic Tagging Method

Author: A. K. Giri, M. Masuda, S. E. Vahsen, T. V. Dong, K. Chilikin, Tagir Aushev, P. K. Resmi, C.-L. Hsu, C. Beleño, V. Zhukova, K. Trabelsi, Peter Kodys, W. W. Jacobs, S. Di Carlo, G. Karyan, Y. Onuki, A. M. Bakich, N. Dash, Y. Iwasaki, Y. J. Kwon, M. Iwasaki, T. J. Moon, K. Nakamura, Soumen Paul, H. Ono, B. G. Cheon, R. Mussa, Felix Metzner, O. Schneider, H. B. Jeon, F. Di Capua, G. Schnell, M. Rozanska, N. Gabyshev, D. Červenkov, B. G. Fulsom, Jyoti Prakash Biswal, A. Ishikawa, J. Schueler, A. Rabusov, M. Z. Wang, K. Kinoshita, P. Pakhlov, B. Bhuyan, K. K. Joo, Y. Seino, M. Nakao, Toru Iijima, J. Bennett, S. Sandilya, Seokhee Park, J. F. Krohn, E. Won, R. Pestotnik, S. Nishida, Iki Adachi, J. K. Lee, S. Korpar, Y. Choi, K. J. Nath, T. Kuhr, S. C. Lee, D. Kotchetkov, T. Matsuda, Doo Young Kim, G. De Nardo, M. Bračko, V. Babu, T. Sumiyoshi, T. K. Pedlar, Y. Sakai, Rocky Bala Garg, M. Nayak, Martin Ritter, M. Uchida, P. L. Wang, H. Atmacan, Y. Guan, R. Cheaib, L. K. Li, Leo Piilonen, A. Vossen, T. Ferber, V. Savinov, B.A. Shwartz, W. Sutcliffe, H. J. Kim, K. Cho, A. Chen, Phillip Urquijo, Seema Bahinipati, T. Sanuki, A. Garmash, H. Aihara, Hitoshi Yamamoto, Z. S. Stottler, K. Nishimura, Z. Doležal, Y. B. Li, T. Pang, G. B. Mohanty, M. Starič, Frank Simon, D. Liventsev, C. H. Kim, Vladimir Popov, Vladimir Zhulanov, P. Križan, R. Itoh, R. Kroeger, M. E. Sevior, I. S. Lee, V. Shebalin, S. Patra, G.V. Russo, Kevin Varvell, F. Tenchini, D. Joffe, M. Takizawa, P. Goldenzweig, E. Waheed, C. Z. Yuan, Tao Luo, K. Tanida, M. T. Prim, J. G. Shiu, K. T. Kim, W. S. Hou, K. Lieret, P. Oskin, O. Hartbrich, M. Merola, Pavel Krokovny, T. Uglov, D. Matvienko, J. Wiechczynski, T. Mori, D. Greenwald, S. H. Kim, Y. Usov, H. Hayashii, G. Pakhlova, N. K. Nisar, Rakesh Kumar, H. Park, A. Bozek, Dipak Kumar Sahoo, Luka Santelj, K. Senyo, K. H. Kang, J. H. Yin, L. Li Gioi, Z. P. Zhang, Kohei Ogawa, X. L. Wang, E. Solovieva, V. Chekelian, R. Van Tonder, A. B. Kaliyar, K. Inami, D. Epifanov, J. S. Lange, S. Cunliffe, B. Pal, Seongbae Yang, C. MacQueen, H. Ye, A. J. Schwartz, H. Kichimi, Takeo Higuchi, M. Campajola, V.N. Zhilich, D. Ferlewicz, V. Gaur, K. Miyabayashi, I. Badhrees, E. Prencipe, G. Caria, G. Varner, U. Tamponi, S. Al Said, S. Jia, Y. Jin, O. Grzymkowska, C. H. Wang, T. Bilka, T. E. Browder, S. Uno, C. Schwanda, D. Cinabro, J. Libby, D. M. Asner, K. Hayasaka, Takeo Kawasaki, Shoichi Watanuki, Prafulla Kumar Behera, Bo Wang, H. E. Cho, Andrey Sokolov, G. Inguglia, P. Chang, James E. Fast, Somnath Choudhury, and Semen Eidelman
Subjects: Physics, Semileptonic decay, Particle physics, Muon, Meson, Electron–positron annihilation, High Energy Physics::Phenomenology, General Physics and Astronomy, 01 natural sciences, Standard Model, KEKB, 0103 physical sciences, High Energy Physics::Experiment, 010306 general physics, Bar (unit), Lepton
Abstract: The experimental results on the ratios of branching fractions $\mathcal{R}(D) = {\cal B}(\bar{B} \to D \tau^- \bar{\nu}_{\tau})/{\cal B}(\bar{B} \to D \ell^- \bar{\nu}_{\ell})$ and $\mathcal{R}(D^*) = {\cal B}(\bar{B} \to D^* \tau^- \bar{\nu}_{\tau})/{\cal B}(\bar{B} \to D^* \ell^- \bar{\nu}_{\ell})$, where $\ell$ denotes an electron or a muon, show a long-standing discrepancy with the Standard Model predictions, and might hint to a violation of lepton flavor universality. We report a new simultaneous measurement of $\mathcal{R}(D)$ and $\mathcal{R}(D^*)$, based on a data sample containing $772 \times 10^6$ $B\bar{B}$ events recorded at the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB $e^+ e^-$ collider. In this analysis the tag-side $B$ meson is reconstructed in a semileptonic decay mode and the signal-side $\tau$ is reconstructed in a purely leptonic decay. The measured values are $\mathcal{R}(D)= 0.307 \pm 0.037 \pm 0.016$ and $\mathcal{R}(D^*) = 0.283 \pm 0.018 \pm 0.014$, where the first uncertainties are statistical and the second are systematic. These results are in agreement with the Standard Model predictions within $0.2$, $1.1$ and $0.8$ standard deviations for $\mathcal{R}(D)$, $\mathcal{R}(D^*)$ and their combination, respectively. This work constitutes the most precise measurements of $\mathcal{R}(D)$ and $\mathcal{R}(D^*)$ performed to date as well as the first result for $\mathcal{R}(D)$ based on a semileptonic tagging method.
Published: 2020
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6. Measurement of the Michel parameters (η‾, ξκ ) in the radiative leptonic decay of τ

Author: J. E. Fast, D. Dossett, M. Niiyama, L. Pesántez, V. Trusov, Andrey Sokolov, S. Shinomiya, Byeong Rok Ko, M. Feindt, I. Nakamura, V. Babu, Hui Li, Jingxu Wang, T. Aushev, O. Frost, Z. Suzuki, J. Grygier, J. H. Kang, Y. Miyachi, Hikaru Kawai, M. Belhorn, Benjamin Schwenker, T. Zivko, Y. B. Hsiung, K. Neichi, A. Zupanc, C. C. Zhang, E. Nakano, Antonio Limosani, T. Ferber, D. H. Lee, H. Kakuno, H. Shibuya, M. Watanabe, L. S. Peak, C. Niebuhr, O. Nitoh, K. Nishimura, Chawon Park, A. Loos, J. C. Dingfelder, M. V. Purohit, P. Goldenzweig, Rupert Leitner, V. V. Zhulanov, J. Yamaoka, Xiuwan Li, K. Senyo, S. Eidelman, L. Shang, Ihn Sik Seong, S. Sandilya, K. Ueno, M. Heck, M. J. Kim, T. Kawasaki, P. Pakhlov, W. Ostrowicz, U. Tamponi, Anton Poluektov, T. Schlüter, S. Sugihara, M. Starič, Y. Igarashi, M. Masuda, Dipanwita Dutta, A. Sugiyama, T. Kumita, M. Uchida, X. H. He, D. Cinabro, Philip Lewis, G. B. Mohanty, C. H. Li, Massimo Berger, B. H. Kim, Y. Yook, H. Yamamoto, L. K. Li, V.N. Zhilich, Y. Kato, V. Chobanova, Y. Kuroki, Satoshi Tanaka, D. Liventsev, Y. Arita, I. Jaegle, K. Miyabayashi, M. Lubej, G. Inguglia, I. Badhrees, Y. Koga, E. Nedelkovska, F. Breibeck, H. Park, J. Stypula, C. Kiesling, E. J. White, A. Bozek, P. Chang, G. S. Varner, Y.-T. Lai, K. Suzuki, P. Schonmeier, M. Iwabuchi, R. Mussa, H. B. Jeon, O. Grzymkowska, C. H. Wang, M. Grosse Perdekamp, R. Itoh, Jung-Hyun Kim, S. Wehle, T. Keck, S. Paul, L. Li Gioi, Y. Yamashita, C. Z. Yuan, Yukinori Sato, J. G. Shiu, M. Nayak, T. Bloomfield, A. Ishikawa, A. Drutskoy, S. E. Vahsen, A. Bay, C.-L. Hsu, T. Saito, S. Rummel, T. Matsuda, Yu Nakahama, M. Tanaka, T. Peng, G. Schnell, A. Rostomyan, Tsukasa Aso, P. Wang, H. Miyata, Y. Hoshi, M. Barrett, B. Bhuyan, Y.L. Han, A. Frey, H. Ye, P. Križan, T. Iijima, Jun Sasaki, H. G. Moser, M. Bračko, Y. Iwasaki, B. G. Fulsom, Peter Kodys, W. W. Jacobs, T. E. Browder, Y. J. Kwon, K. Nakamura, Ya-Qiu Jin, P. Hamer, K. Hayasaka, A. Bobrov, H. Hayashii, Hyunyong Kim, O. Schneider, K. Prasanth, M. Imamura, T. Nagamine, K. Trabelsi, P. Katrenko, T. Müller, J. Klucar, K. T. Kim, C. P. Shen, S. Di Carlo, Seok Kim, S. Okuno, B. Shwartz, Jamal Rorie, D. Getzkow, C. B. Van Hulse, I. Adachi, A. Ogawa, K. Negishi, T. Kuhr, D. Z. Besson, E. Ribežl, D. Santel, Phillip Urquijo, N. Sasao, Victoria Zhukova, V. Savinov, M. Danilov, H. Nakayama, D. Y. Kim, R. Gillard, R. Mizuk, Eberhard Widmann, J. F. Strube, Matthew Jones, M. Z. Wang, K. Kinoshita, M. Yamauchi, G. Bonvicini, Y. B. Li, Y. Teramoto, I. Tikhomirov, D. Mohapatra, J. B. Singh, A. Chen, K. Hara, S. K. Choi, Sanmay Ganguly, T. Uchida, Y. Ban, N. Zwahlen, Bruce Yabsley, L. Zhao, M. Heider, M. Rozanska, D. Kotchetkov, Y. Yusa, A. Vinokurova, S. Dubey, Rahul Kumar, J. Libby, R. Louvot, Y. Chao, G. N. Taylor, R. Glattauer, V.E. Shebalin, J. Haba, W. Bartel, S. Nishida, S. Al Said, K. Hoshina, Y. Seino, Y. Onuki, K. Vervink, Z. Drásal, Marko Petrič, M. T. Prim, K. Itagaki, Z. Q. Liu, C. Bookwalter, B. G. Cheon, H. J. Hyun, S. Uozumi, P. Smerkol, Tariq Aziz, X. L. Wang, D. Heffernan, T. Morii, C. Boulahouache, J. Hasenbusch, V. Chekelian, J. Li, V. M. Aulchenko, H. Guo, T.-A. Shibata, T. Horiguchi, Y. Ono, S. Koblitz, Seema Bahinipati, Y. Choi, H. Takeichi, K. J. Nath, S. Uno, C. Schwanda, P. Krokovny, M. T. Hedges, Samo Stanič, L.M. Zhang, E. Kurihara, A.E. Bondar, P.A. Lukin, T. Nakano, K. Dutta, A. Garmash, Daniel Greenwald, M. Takizawa, B. Reisert, Y. Sakai, J. Rauch, B. K. Pal, E. L. Barberio, M. Shapkin, Noritaka Shimizu, T. Hara, L. Santelj, J. Dalseno, Robin Wedd, K. M. Williams, V. Bansal, K. Belous, A. M. Bakich, S. Korpar, Jolanta Brodzicka, John Yelton, T. Ohshima, Z. Doležal, K. Chilikin, Y. J. Kim, N. Dash, S. Iwata, H. Ozaki, H. Nakano, C. Ng, K. H. Kang, K. Cho, K. Inami, M. Sumihama, A. Heller, M. D. Peters, Motoki Iwasaki, Y. Ushiroda, N. Taniguchi, Y. M. Goh, S. H. Lee, K. Prothmann, R. Pestotnik, N. Gabyshev, D. Červenkov, A. Abdesselam, M. Steder, M. E. Sevior, I. S. Lee, D. Matvienko, Y. Miyazaki, R. Sinha, P. K. Behera, Yasushi Nagasaka, B. Kronenbitter, Sumio Yamada, E. Kato, M. Leitgab, Tao Luo, K. Tanida, F. Tenchini, T. Sumiyoshi, A. Bala, D. Epifanov, Soumya D. Mohanty, C. Pulvermacher, Martin Ritter, Dmytro Levit, Z. Natkaniec, S. L. Blyth, T. Sanuki, Shigeki Hirose, K. K. Joo, Hirokazu Miyake, R. Seidl, Y. Guan, E. Solovieva, Norihito Muramatsu, M. Huschle, K. Sakai, Y. Watanabe, S. K. Kim, A.L. Sibidanov, H. Kichimi, M. C. Chang, K. S. Park, V. Bhardwaj, T. K. Pedlar, T. Tsuboyama, H. Palka, L. E. Piilonen, G. Pakhlova, J. Wiechczynski, R. Kulasiri, S. U. Kataoka, S. Yashchenko, A. Moll, S. L. Olsen, D. Joffe, T. Julius, Po-Hsun Chen, R. Chistov, A. Vossen, O. Seon, Frank Simon, D. Semmler, Y. Unno, K. F. Chen, R. Ayad, T. Nozaki, S. Uehara, M. N. Wagner, Peter Kvasnicka, A. B. Kaliyar, Sunmin Ryu, C. W. Park, E. Won, C. Oswald, H. Atmacan, P. Vanhoefer, E. Panzenböck, B. Golob, M. Schram, N. K. Nisar, H. K. Moon, J. S. Lange, M. Ziegler, K. Adamczyk, Y. Soloviev, W. S. Hou, K. Arinstein, Y. Mikami, Alexei Kuzmin, V. Vorobyev, Nagao Kobayashi, Y. F. Liu, C. Kleinwort, Z. P. Zhang, H. Sahoo, Tara Nanut, T. Uglov, Yoji Hasegawa, S. Y. Suzuki, Richard T. Kouzes, K. Sumisawa, D. M. Asner, S. Himori, Kevin Varvell, A. Matyja, Jason Crnkovic, T. Mori, H. Aihara, Y. Usov, Jyoti Prakash Biswal, C. Liu, H. Nakazawa, A. J. Schwartz, H. Farhat, J. B. Kim, T. Higuchi, S. Ogawa, V. Gaur, Y. S. Sohn, Ferdinando Giordano, M. Nakao, E. Waheed, S. McOnie, J. MacNaughton, and P. Kapusta
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Maximum likelihood, Electron–positron annihilation, 01 natural sciences, law.invention, Nuclear physics, KEKB, law, 0103 physical sciences, Radiative transfer, Michel parameters, Statistical analysis, 010306 general physics, Collider, Lepton
Abstract: We present the first measurement of the Michel parameters η ‾ and ξκ in the radiative leptonic decay of the τ lepton using 703 fb-1 of data collected with the Belle detector at the KEKB e + e − collider. The Michel parameters are measured by an unbinned maximum likelihood fit to the kinematic information of e + e − → τ + τ − → ( π + π 0 ν ‾ ) ( l − ν ν ‾ γ ) ( l = e or μ ) . The preliminary values of the measured Michel parameters are η ‾ = − 2.0 ± 1.5 ± 0.8 and ξ κ = 0.6 ± 0.4 ± 0.2 , where the first error is statistical and the second is systematic.
Published: 2017
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7. First measurements of absolute branching fractions of the Ξc+ baryon at Belle

Author: P. Goldenzweig, S. Pardi, M. Uchida, L. K. Li, D. Liventsev, D. M. Asner, J. F. Strube, S. Nishida, Jyoti Prakash Biswal, Sudhanwa Patra, M. Starič, A. B. Kaliyar, M. Bračko, Z. S. Stottler, G. S. Varner, J. Schueler, I. Adachi, V. Chekelian, A. M. Bakich, L. Li Gioi, E. Won, N. Gabyshev, D. Červenkov, M. Salehi, Y. Onuki, A. Rostomyan, P. Wang, J. K. Lee, V. Gaur, R. Van Tonder, B. K. Pal, V.E. Shebalin, D. Epifanov, L. E. Piilonen, H. Atmacan, Deepak Kumar Sahoo, V.N. Zhilich, R. Mizuk, R. Mussa, Y. Kato, P. C. Lu, C. P. Shen, M. Nakao, Seok Kim, R. B. Garg, J. G. Shiu, G. Pakhlova, B. Bhuyan, B. G. Fulsom, S. E. Vahsen, J. Libby, J. MacNaughton, T. E. Browder, V. Babu, D. Matvienko, R. Kulasiri, G.V. Russo, V. Bhardwaj, T. K. Pedlar, H. Ye, T. Aushev, C. Beleño, W. S. Hou, T. Ferber, T. Uglov, V. Savinov, Y. B. Li, M. Nayak, Y. Choi, K. J. Nath, Seokhee Park, R. Ayad, K. Inami, T. Hara, Ya-Qiu Jin, M. Sumihama, Motoki Iwasaki, Y. Ushiroda, S. Eidelman, Z. P. Zhang, A. Ishikawa, K. Miyabayashi, L. Santelj, K. Senyo, S. Al Said, Y. Seino, P. Pakhlov, M. Niiyama, Y. Iwasaki, Y. J. Kwon, T. Matsuda, J. H. Yin, T. Kawasaki, M. Z. Wang, K. Kinoshita, Shoichi Watanuki, K. Tanida, U. Tamponi, O. Schneider, A. K. Giri, H. Park, A. Bozek, S. Cunliffe, Victoria Zhukova, B. G. Cheon, N. K. Nisar, A. Vinokurova, K. Lalwani, S. Uno, C. Schwanda, D. Cinabro, S. Jia, J. S. Lange, Shih-Chang Lee, A. Kuzmin, M. Masuda, G. B. Mohanty, H. Kichimi, P. Krokovny, Andrey Sokolov, H. Aihara, A. Chen, S. Ogawa, J. Haba, O. Grzymkowska, G. Inguglia, C. H. Wang, K. Cho, H. Ono, S. Paul, B. Shwartz, J. E. Fast, L. Cao, H. Miyata, S. Korpar, D. Dossett, J. K. Ahn, K. K. Joo, F. Tenchini, K. Chilikin, H. Hayashii, Hyunyong Kim, A. J. Schwartz, T. Sumiyoshi, Bo Wang, K. Nishimura, C. H. Kim, R. Kroeger, M. E. Sevior, I. S. Lee, Martin Ritter, T. Bilka, M. Campajola, T. Sanuki, Y. Ban, K. Hayasaka, A. Bobrov, Y. Yusa, A. Garmash, H. E. Cho, Peter Kodys, W. W. Jacobs, R. Pestotnik, B. Grube, Somnath Choudhury, Toru Iijima, V. Bansal, V. V. Zhulanov, S. Di Carlo, G. Karyan, T. J. Moon, Y. Unno, Jihwa Lee, P. K. Behera, Y. Sakai, M. Merola, K. T. Kim, K. Lieret, D. Y. Kim, G. Schnell, T. Kuhr, C. H. Li, E. Solovieva, M. Takizawa, D. Joffe, Seongbae Yang, John Yelton, Z. Doležal, Frank Simon, Vladimir Popov, D. Kotchetkov, P. Križan, Massimo Berger, C. Z. Yuan, and E. Prencipe
Subjects: Physics, Baryon, Particle physics, KEKB, 010308 nuclear & particles physics, Branching fraction, Product (mathematics), Electron–positron annihilation, 0103 physical sciences, 010306 general physics, Lambda, 01 natural sciences, Bar (unit)
Abstract: We present the first measurements of the absolute branching fractions of $\Xi_c^+$ decays into $\Xi^- \pi^+ \pi^+$ and $p K^- \pi^+$ final states. Our analysis is based on a data set of $(772\pm 11)\times 10^{6}$ $B\bar{B}$ pairs collected at the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB $e^+e^-$ collider. We measure the absolute branching fraction of $\bar{B}^{0} \to \bar{\Lambda}_{c}^{-} \Xi_{c}^{+}$ with the $\Xi_c^+$ recoiling against $\bar{\Lambda}_c^-$ in $\bar{B}^0$ decays resulting in ${\cal B}(\bar{B}^{0} \to \bar{\Lambda}_{c}^{-} \Xi_{c}^{+}) = [1.16 \pm 0.42(\rm stat.) \pm 0.15(\rm syst.)] \times 10^{-3}$. We then measure the product branching fractions ${\cal B}(\bar{B}^{0} \to \bar{\Lambda}_c^- \Xi_c^+){\cal B}(\Xi_c^+ \to \Xi^- \pi^+ \pi^+)$ and ${\cal B}(\bar{B}^{0} \to \bar{\Lambda}_c^- \Xi_c^+){\cal B}(\Xi_c^+ \to p K^- \pi^+)$. Dividing these product branching fractions by $\bar{B}^{0} \to \bar{\Lambda}_{c}^{-} \Xi_{c}^{+}$ yields: ${\cal B}(\Xi_c^+ \to \Xi^- \pi^+ \pi^+) = [2.86 \pm 1.21(\rm stat.) \pm 0.38(\rm syst.)]\%$ and ${\cal B}(\Xi_c^+ \to p K^- \pi^+)=[0.45 \pm 0.21(\rm stat.) \pm 0.07(\rm syst.)]\%$. Our result for ${\cal B}(\Xi_c^+ \to \Xi^- \pi^+ \pi^+)$ can be combined with $\Xi_c^+$ branching fractions measured relative to $\Xi_c^+ \to \Xi^- \pi^+ \pi^+$ to set the absolute scale for many $\Xi_c^+$ branching fractions.
Published: 2019
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8. Evidence for the decay B0→pp¯π0

Author: L. E. Piilonen, K. Nishimura, G. Pakhlova, H. Miyata, R. Kulasiri, Bo Wang, D. Joffe, Seongbae Yang, K. Hayasaka, A. Bobrov, C.-L. Hsu, Peter Kodys, W. W. Jacobs, S. Di Carlo, G. Karyan, K. T. Kim, Frank Simon, P. C. Lu, R. Mizuk, C. Beleño, K. Adamczyk, Vladimir Popov, G.V. Russo, S. K. Choi, A. Ishikawa, W. S. Hou, A. K. Giri, M. Masuda, G. B. Mohanty, L. Cao, C. P. Shen, P. Križan, Y. Sakai, Seok Kim, R. B. Garg, B. Bhuyan, I. Adachi, H. Aihara, K. Senyo, V. Babu, B. G. Fulsom, M. Salehi, T. Aushev, Jyoti Prakash Biswal, M. Takizawa, A. B. Kaliyar, T. E. Browder, Y. Iwasaki, Y. J. Kwon, M. Uchida, John Yelton, L. K. Li, M. Iwasaki, Z. Doležal, J. Schueler, Z. S. Stottler, G. Schnell, T. Iijima, T. Ferber, E. Won, D. Y. Kim, O. Schneider, D. Liventsev, B. G. Cheon, K. Inami, J. F. Strube, V. Gaur, V. Savinov, E. Solovieva, J. Libby, F. Tenchini, M. Nakao, H. Atmacan, G. S. Varner, M. Z. Wang, J. MacNaughton, Jihwa Lee, H. Ono, K. Kinoshita, S. Ogawa, U. Tamponi, R. Itoh, J. Haba, T. Sumiyoshi, Sudhanwa Patra, S. Nishida, Shih-Chang Lee, D. Kotchetkov, A. Rostomyan, Jia-ju Zhang, P. Wang, P. Goldenzweig, S. Korpar, Z. P. Zhang, V. Chekelian, S. Sandilya, Y. Seino, M. Merola, T. Sanuki, Massimo Berger, R. Van Tonder, B. K. Pal, N. K. Nisar, Shoichi Watanuki, M. Starič, S. Eidelman, S. Pardi, J. G. Shiu, R. Ayad, P. Pakhlov, E. Prencipe, S. Jia, S. Uno, C. Schwanda, S. Cunliffe, H. Hayashii, C. Kiesling, Phillip Urquijo, Y. Guan, C. H. Kim, D. M. Asner, A. Bozek, Y. B. Li, C. MacQueen, D. Matvienko, R. Kroeger, M. E. Sevior, A. J. Schwartz, M. Bračko, C. H. Wang, Seokhee Park, Tao Luo, K. Tanida, S. Paul, L. Li Gioi, M. Campajola, T. Uglov, V.N. Zhilich, D. Cinabro, H. Kichimi, H. Ye, K. Miyabayashi, I. Badhrees, M. Nayak, N. Gabyshev, D. Červenkov, W. Sutcliffe, Y. Onuki, Ya-Qiu Jin, J. E. Fast, V. M. Aulchenko, D. Dossett, T. Matsuda, A. Garmash, T. Bilka, M. Watanabe, V. Bansal, A. Vinokurova, P. K. Behera, P. Krokovny, K. Cho, D. Epifanov, V. Bhardwaj, T. K. Pedlar, Victoria Zhukova, A. Chen, K. Chilikin, R. Pestotnik, Y. Yusa, K. K. Joo, T. V. Dong, Y. Choi, K. J. Nath, T. Hara, and Andrey Sokolov
Subjects: Physics, Particle physics, 010308 nuclear & particles physics, Branching fraction, Electron–positron annihilation, Resonance, 01 natural sciences, Belle experiment, Luminosity, Baryon, KEKB, 0103 physical sciences, 010306 general physics, Bar (unit)
Abstract: We report a search for the charmless baryonic decay $B^0\to p\bar{p}\pi^0$ with a data sample corresponding to an integrated luminosity of 711~$\rm fb^{-1}$ containing $(772\pm 10)\times 10^6$ $B^0\bar{B}^0$ pairs. The data was collected by the Belle experiment running on the $\Upsilon(4S)$ resonance at the KEKB $e^+e^-$ collider. We measure a branching fraction $\mathcal{B}(B^0\to p\bar{p}\pi^0)= (5.0\pm1.8\pm0.6 )\times 10^{-7}$, where the first uncertainty is statistical and the second is systematic. The signal has a significance of 3.1 standard deviations and constitutes the first evidence for this decay mode. We also search for the intermediate two-body decays $B^{0}\to\Delta^+\bar{p}$ and $B^0\to\bar{\Delta}^-p$, and set an upper limit on the branching fraction: $\mathcal{B}(B^0\to \Delta^+\bar{p})+\mathcal{B}(B^0\to\bar{\Delta}^-p)
Published: 2019
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9. Observation of Ξ(1620)0 and Evidence for Ξ(1690)0 in Ξc+→Ξ−π+π+ Decays

Author: V.N. Zhilich, Y. Kato, S. Al Said, K. T. Kim, K. Miyabayashi, I. Badhrees, M. Merola, J. K. Ahn, J. G. Shiu, H. Park, A. Bozek, Andrey Sokolov, R. Mizuk, S. K. Choi, C. Kiesling, Y. Choi, K. J. Nath, H. Ono, K. Chilikin, Phillip Urquijo, C. Beleño, Y. B. Li, James E. Fast, K. Senyo, Semen Eidelman, P. Pakhlov, G. Schnell, D. Epifanov, M. Iwasaki, S. Hirose, Iki Adachi, M. Takizawa, B. G. Cheon, S. Uno, C. Schwanda, S. Nishida, M. Sumihama, N. Taniguchi, Vikas Bansal, A. Garmash, S. Sandilya, N. K. Nisar, B. Pal, C. P. Shen, L. E. Piilonen, E. Nakano, M. Uchida, John Yelton, Z. Doležal, L. K. Li, X. L. Wang, V. Bhardwaj, C. Van Hulse, Z. Natkaniec, Z. Drásal, J. B. Kim, T. K. Pedlar, Soumen Paul, V. Babu, M. Niiyama, M. Starič, Z. P. Zhang, V. Chekelian, T. Aushev, V. Gaur, G. S. Varner, S. Korpar, Massimo Berger, D. Kotchetkov, Eleonora Guido, S. E. Vahsen, T. Nakano, T. Julius, R. Itoh, Shih-Chang Lee, C. Z. Yuan, Peter Kodys, W. W. Jacobs, K. K. Joo, B. Bhuyan, A. B. Kaliyar, R. Ayad, H. K. Moon, J. S. Lange, B. G. Fulsom, Seema Bahinipati, G. Pakhlova, R. Mussa, G. B. Mohanty, H. B. Jeon, T. Matsuda, M. Gelb, Y. Iwasaki, Y. J. Kwon, D. Y. Kim, A. Ishikawa, F. Tenchini, V. Savinov, O. Schneider, S. Di Carlo, Jyoti Prakash Biswal, G. Karyan, T. Sumiyoshi, M. Nakao, A. Chen, Y. Yusa, S. Zakharov, P. Križan, G. Bonvicini, T. V. Dong, Martin Ritter, T. A. Shibata, H. Miyata, J. F. Strube, V. Vorobyev, T. Sanuki, E. Won, A. K. Giri, V. Zhukova, S. H. Kim, P. Krokovny, Rakesh Kumar, R. Pestotnik, M. Masuda, P. L. Wang, K. H. Kang, K. Cho, H. Atmacan, S. Cunliffe, L. Li Gioi, T. Bilka, G.V. Russo, M. Watanabe, V.E. Shebalin, T. E. Browder, U. Tamponi, W. S. Hou, T. Mori, H. Aihara, S. Jia, C. H. Wang, H. Ye, Tara Nanut, T. Uglov, A. Kuzmin, M. Bračko, Rocky Bala Garg, Eberhard Widmann, A. M. Bakich, N. Dash, B.A. Shwartz, N. Gabyshev, D. Červenkov, D. Liventsev, Vladimir Zhulanov, Y. Jin, R. Kroeger, M. E. Sevior, I. S. Lee, P. Goldenzweig, Tao Luo, K. Tanida, Bingran Wang, D. Matvienko, D. Cinabro, M. Lubej, G. Inguglia, E. Solovieva, J. Haba, A. Vossen, Somnath Choudhury, S. Pardi, Frank Simon, Vladimir Popov, J. Libby, D. M. Asner, K. Hayasaka, Y. Seino, Shoichi Watanuki, Dipak Kumar Sahoo, Luka Santelj, K. Inami, M. Z. Wang, K. Kinoshita, T. Czank, and H. Hayashii
Subjects: Physics, Particle physics, Electron–positron annihilation, Quark model, Hyperon, General Physics and Astronomy, Strangeness, 01 natural sciences, Baryon, KEKB, 0103 physical sciences, Pi, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics
Abstract: We report the first observation of the doubly-strange baryon $\Xi(1620)^0$ in its decay to $\Xi^-\pi^+$ via $\Xi_c^+ \rightarrow \Xi^- \pi^+ \pi^+$ decays based on a $980\,{\rm fb}^{-1}$ data sample collected with the Belle detector at the KEKB asymmetric-energy $e^+ e^-$ collider. The mass and width are measured to be 1610.4 $\pm$ 6.0 (stat) $^{+5.9}_{-3.5}$ (syst)~MeV$/c^2$ and 59.9 $\pm$ 4.8 (stat) $^{+2.8}_{-3.0}$ (syst)~MeV, respectively. We obtain 4.0$\sigma$ evidence of the $\Xi(1690)^0$ with the same data sample. These results shed light on the structure of hyperon resonances with strangeness $S=-2$.
Published: 2019
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10. Observation of B+→pΛ¯K+K− and B+→p¯ΛK+K+

Author: D. Cinabro, M. Lubej, G. Inguglia, G. Schnell, T. Iijima, P. Chang, Somnath Choudhury, T. Kuhr, H. Miyata, M. Uchida, Bo Wang, S. Nishida, J. E. Fast, P. Goldenzweig, M. Sumihama, L. K. Li, D. Liventsev, S. Pardi, J. K. Ahn, K. Hayasaka, X. L. Wang, V. Chekelian, S. Sandilya, Andrey Sokolov, Y. Sakai, S. Okuno, D. Kotchetkov, M. Starič, A. Rabusov, T. Bilka, R. Kroeger, M. E. Sevior, I. S. Lee, G. S. Varner, R. Van Tonder, B. K. Pal, Eleonora Guido, H. Ono, V. Babu, M. Watanabe, E. Solovieva, D. Joffe, J. Libby, A. Vossen, Frank Simon, Vladimir Popov, R. Itoh, A. Rostomyan, S. Eidelman, T. Matsuda, G. Bonvicini, L. Li Gioi, Shih-Chang Lee, Y. Seino, P. Pakhlov, S. E. Vahsen, A. Vinokurova, T. Aushev, H. Ye, Shoichi Watanuki, V.N. Zhilich, H. Park, A. Bozek, P. Krokovny, M. Merola, A. B. Kaliyar, C. B. Van Hulse, M. Z. Wang, K. Kinoshita, Y. Iwasaki, Y. J. Kwon, D. Matvienko, K. Cho, V. V. Zhulanov, O. Schneider, B. Shwartz, U. Tamponi, T. Ferber, R. B. Garg, B. Bhuyan, K. Miyabayashi, I. Badhrees, D. Epifanov, Shigeki Hirose, M. Takizawa, S. Jia, E. Won, B. G. Fulsom, T. E. Browder, A. Garmash, V. Bansal, A. K. Giri, W. Sutcliffe, Z. Doležal, C. H. Wang, V. Savinov, P. K. Behera, H. Atmacan, S. Paul, A. Zupanc, Y. Unno, J. B. Kim, Tara Nanut, M. Gelb, J. H. Yin, J. G. Shiu, R. Ayad, K. T. Kim, T. Uglov, J. B. Singh, S. K. Choi, Massimo Berger, N. K. Nisar, Tao Luo, K. Tanida, V. M. Aulchenko, H. K. Moon, J. S. Lange, M. Masuda, G. B. Mohanty, C. Z. Yuan, E. Prencipe, G.V. Russo, S. Cunliffe, K. Senyo, W. S. Hou, I. Adachi, V. Vorobyev, C. P. Shen, H. Hayashii, Seok Kim, M. Salehi, Hyunyong Kim, T. Kawasaki, Victoria Zhukova, T.-A. Shibata, A. M. Bakich, H. Kichimi, R. Mussa, P. C. Lu, H. B. Jeon, L. Cao, A. Chen, A. Kuzmin, M. C. Chang, Phillip Urquijo, K. Inami, S. Ogawa, Z. Drásal, C.-L. Hsu, A. Ishikawa, Y. B. Li, D. M. Asner, K. Chilikin, H. Ozaki, Peter Kodys, W. W. Jacobs, P. Križan, F. Tenchini, S. Di Carlo, N. Gabyshev, D. Červenkov, R. Mizuk, R. Pestotnik, C. Beleño, M. Iwasaki, T. Sumiyoshi, B. G. Cheon, Martin Ritter, T. Sanuki, Eberhard Widmann, L. E. Piilonen, J. Haba, G. Pakhlova, J. F. Strube, R. Kulasiri, S. Korpar, D. Y. Kim, T. Julius, N. Dash, R. Chistov, K. K. Joo, C. Kiesling, T. V. Dong, M. Bračko, Y. Choi, K. J. Nath, L. Santelj, Z. Natkaniec, Jyoti Prakash Biswal, V. Gaur, S. Al Said, M. Nakao, S. Uno, C. Schwanda, V. Bhardwaj, T. K. Pedlar, Y.-T. Lai, M. Nayak, T. Mori, H. Aihara, Ya-Qiu Jin, Y. Usov, Z. P. Zhang, and V.E. Shebalin
Subjects: Physics, KEKB, 010308 nuclear & particles physics, Electron–positron annihilation, 0103 physical sciences, Analytical chemistry, Resonance, 010306 general physics, Lambda, 01 natural sciences, Bar (unit)
Abstract: We report the study of B+→pΛ¯K+K- and B+→p¯ΛK+K+ decays using a 772×106 BB¯ pair data sample recorded on the ϒ(4S) resonance with the Belle detector at KEKB. The following branching fractions are measured: B(B+→pΛ¯K+K-)=(4.10-0.43+0.45±0.50)×10-6, B(B+→p¯ΛK+K+)=(3.70-0.37+0.39±0.44)×10-6, B(ηc→pΛ¯K-+c.c.)=(2.83-0.34+0.36±0.35)×10-3 and B(B+→pΛ¯ϕ)=( 7.95±2.09±0.77)×10-7, where c.c. denotes the corresponding charge-conjugation process. The intermediate resonance decays are excluded in the four-body decay measurements. We also find evidence for B(ηc→Λ(1520)Λ¯+c.c.)=(3.48±1.48±0.46)×10-3 and B(B+→Λ(1520)Λ¯K+)=( 2.23±0.63±0.25)×10-6. No significant signals are found for J/ψ→Λ(1520)Λ¯+c.c. and B+→Λ¯(1520)ΛK+; we set the 90% confidence level upper limits on their decay branching fractions as
Published: 2019
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11. Measurement of time-dependent CP violation in B0→KS0π0π0 decays

Author: S. Al Said, K. T. Kim, K. Chilikin, V.N. Zhilich, T. Matsuda, S. K. Choi, T. A. Shibata, H. Miyata, Prafulla Kumar Behera, G.V. Russo, Y. Iwasaki, Y. J. Kwon, Y. Guan, S. Uno, S.I. Eidelman, C. Schwanda, R. Pestotnik, Jyoti Prakash Biswal, A. Vossen, U. Tamponi, O. Seon, N. Dash, F. Tenchini, D. Kotchetkov, K. Miyabayashi, I. Badhrees, V. Gaur, G. B. Mohanty, V. Babu, T. Aushev, T. Sumiyoshi, Yoshinobu Unno, H. Atmacan, O. Schneider, S. H. Kim, Tao Luo, S. Jia, Rakesh Kumar, K. Tanida, Y. Yusa, G. Schnell, V. Vorobyev, T. Sanuki, K. H. Kang, M. Merola, B. Bhuyan, J. Libby, D. M. Asner, C. H. Wang, T. E. Browder, A. Chen, V.M. Aulchenko, L. Li Gioi, T. Kuhr, K. Hayasaka, M. Takizawa, Z. Drásal, J. H. Yin, S. Cunliffe, H. Ye, K. Senyo, N. K. Nisar, M. Z. Wang, K. Kinoshita, Vikas Bansal, Peter Kodys, W. W. Jacobs, Y. Seino, E. Nakano, D. Epifanov, B. Pal, T. K. Pedlar, Bingran Wang, C. Kiesling, Vladimir Popov, S. Di Carlo, B. Golob, S. Ogawa, M. Sumihama, C. Van Hulse, Z. P. Zhang, V. Savinov, D. Cinabro, H. K. Moon, A. K. Giri, S. Hirose, J. S. Lange, E. Waheed, J. G. Shiu, A. Garmash, T. Kawasaki, M. Lubej, G. Inguglia, M. Uchida, L. E. Piilonen, M. Masuda, Y. B. Li, L. K. Li, G. Pakhlova, V. Bhardwaj, C. P. Shen, Shih-Chang Lee, M. Iwasaki, M. Bračko, B. G. Cheon, Kohei Ogawa, G. S. Varner, E. Prencipe, K. Inami, E. Won, R. Itoh, A. J. Schwartz, D. Liventsev, L. Cao, Y. Ushiroda, S. Pardi, S. Korpar, Vladimir Zhulanov, A. Rostomyan, P. Wang, Y. Jin, R. Kroeger, B. G. Fulsom, H. Park, A. Bozek, Rocky Bala Garg, Kevin Varvell, M. E. Sevior, I. S. Lee, Tara Nanut, P. Goldenzweig, T. Uglov, H. Hayashii, H. Aihara, Y. Usov, J. Haba, K. Nishimura, James E. Fast, H. Ono, R. Mizuk, R. Ayad, Seema Bahinipati, D. Y. Kim, J. B. Kim, S. Sandilya, S. Nishida, A. M. Bakich, M. Starič, Soumen Paul, Z. Natkaniec, V. Chekelian, A. Ishikawa, R. Van Tonder, M. Nakao, P. Križan, K. K. Joo, D. Červenkov, T. V. Dong, Y. Choi, K. J. Nath, and Y. Sakai
Subjects: Physics, Particle physics, 010308 nuclear & particles physics, Electron–positron annihilation, Resonance, 01 natural sciences, Belle experiment, law.invention, Amplitude, KEKB, law, 0103 physical sciences, CP violation, 010306 general physics, Collider
Abstract: We report a measurement of time-dependent CP violation in B0→KS0π0π0 decays using a data sample of 772×106 BB¯ pairs collected by the Belle experiment running at the ϒ(4S) resonance at the KEKB e+e- collider. This decay proceeds mainly via a b→sdd¯ “penguin” amplitude. The results are sin2ϕ1eff=0.92-0.31+0.27 (stat.) ±0.11 (syst.) and A=0.28±0.21 (stat.) ±0.04 (syst.), which are the most precise measurements of CP violation in this decay mode to date. The value for the CP-violating parameter sin2ϕ1eff is consistent with that obtained using decay modes proceeding via a b→cc¯s “tree” amplitude.
Published: 2019
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12. First Evidence for cos2β>0 and Resolution of the Cabibbo-Kobayashi-Maskawa Quark-Mixing Unitarity Triangle Ambiguity

Author: V. B. Golubev, K. Chilikin, L. Zani, J. R. Wilson, Iki Adachi, T. S. Miyashita, Doo Young Kim, A. Palano, S. Emery, M. Feindt, J. B. Kim, K. Griessinger, D. Epifanov, A. Hafner, W. R. Innes, David Hutchcroft, O. Long, R. Cenci, Brian Meadows, J. M. Izen, M. Bellis, Eleonora Guido, H. Neal, K. Inami, H. Ye, R. Kass, S. Martellotti, D. W G S Leith, G. Schnell, E. Won, R. Pestotnik, S. Nishida, A. Calcaterra, J. P. Coleman, J. A. McKenna, T. E. Browder, J. Ocariz, M. T. Graham, F. Ferroni, R. J. Sobie, A. Roodman, S. Pardi, J. L. Ritchie, Noritaka Shimizu, Vikas Bansal, Eleonora Luppi, A. Beaulieu, Tara Nanut, T. Uglov, A. V. Gritsan, G. Wormser, A. G. Denig, Vitaly Vorobyev, B. N. Ratcliff, R. Y. So, T. Kuhr, S. R. Wagner, G. De Nardo, H. M. Lacker, M. Starič, D. Liventsev, E. Nakano, Z. Drásal, V. Savinov, D. J. Summers, C. H. Cheng, H. Ono, D. A. Roberts, S. Al Said, T. Matsuda, A. J S Smith, D. S. Chao, Vladimir Zhulanov, R. Kroeger, E. Ben-Haim, M. E. Sevior, I. S. Lee, S. J. Sekula, C. Bozzi, R. Mizuk, M. Piccolo, F. Di Lodovico, S. Uno, R. Kulasiri, T. Schroeder, A. J. Lankford, S. Sandilya, R. Godang, P. Goldenzweig, P. Pakhlov, N. Tasneem, J. Albert, G.V. Russo, J. Cochran, Yu. G. Kolomensky, H. Hayashii, J. Libby, C. Van Hulse, T. A. Shibata, Z. C. Huard, U. Tamponi, S. Passaggio, H. Miyata, B. Pal, Y. B. Li, Marcin Chrzaszcz, F. Le Diberder, Michael Sokoloff, Ray Franklin Cowan, P. C. Kim, F. U. Bernlochner, P. Patteri, Prafulla Kumar Behera, W. S. Hou, I. M. Peruzzi, B. Oberhof, F. Simonetto, J. G. Shiu, G. J. King, V. Babu, K. T. Kim, J. K. Ahn, A. Soffer, M. Z. Wang, K. Kinoshita, B. Bhuyan, N. Guttman, H. Park, A. Bozek, S. H. Kim, J. Dorfan, M. Gelb, H. Koch, Vladimir Popov, A. Zallo, S. Jia, D. N. Brown, R. Stroili, R. Ayad, K. Cho, C. Hearty, M. Iwasaki, P. K. Resmi, Marcello Rotondo, B. G. Cheon, James E. Fast, A. Kuzmin, M. Ebert, T. K. Pedlar, T. Kumita, K. Yu. Todyshevx, F. Forti, Y. Choi, K. J. Nath, E. A. Kravchenko, L. Santelj, K. H. Kang, T. Leddig, Shih-Chang Lee, D. Matvienko, C. Voß, M. Bomben, J. Haba, Dominik Müller, X. C. Lou, C. Chen, G. Finocchiaro, C. Z. Yuan, Y. Jin, A. J. Schwartz, C. H. Wang, Alberto Lusiani, Semen Eidelman, E. Grauges, L. Vitale, S. Ogawa, A. Rossi, Y. Watanabe, J. P. Lees, A. Filippi, S. E. Vahsen, G. A. Cowan, C. Bünger, C. Sciacca, R. C. Field, Gabriele Simi, G. Eigen, R. Gorodeisky, F. Martinez-Vidal, J. J. Walsh, C. Schwanda, R. Itoh, H. Ahmed, D. Cinabro, Tao Luo, F. Tenchini, Th. Müller, G. Rizzo, Y. Sakai, D. Bernard, J. Chauveau, S. I. Serednyakov, F. Palombo, S. Korpar, E. Gabathuler, T. Ferber, Tagir Aushev, C. Cartaro, Y. Onuki, A. Jawahery, M. Nayak, G. Cibinetto, M. K. Sullivan, M. Margoni, Y. Guan, A. Oyanguren, E. Waheed, R. M. Seddon, Nicola Neri, J. W. Gary, V. Gaur, W. Panduro Vazquez, Y. Iwasaki, C. Touramanis, S. Luitz, K. R. Schubert, P. Taras, S. Hirose, D. J. Payne, E. Fioravanti, Y. Li, Y. J. Kwon, V.N. Zhilich, F. Ferrarotto, E. M. T. Puccio, G. B. Mohanty, P. L. Wang, B. Golob, T. Lueck, Roland Waldi, Biplab Dey, Peter Kodys, Fergus Wilson, M. A. Giorgi, E. Paoloni, A. Zupanc, F. De Mori, A. B. Kaliyar, P. F. Harrison, H. Kichimi, D. G. Hitlin, H. K. Moon, M. R. Convery, A. Chen, F. Bianchi, G. Piredda, O. Schneider, U. Mallik, R. Cheaib, Y. Yusa, Bingran Wang, M. Röhrken, K. Senyo, J. S. Lange, V. Santoro, W. J. Wisniewski, C. Hast, W. W. Jacobs, A. M. Eisner, I. M. Nugent, M. T. Hedges, M. Carpinelli, K. Miyabayashi, I. Badhrees, M. Posocco, B. G. Fulsom, R. F. Schwitters, G. Varner, R. Mussa, A. M. Lutz, K. T. Flood, G. Casarosa, Simon Akar, M. Takizawa, Pavel Krokovny, R. Calabrese, V. E. Blinov, A. R. Buzykaev, A. Ishikawa, G. Vasseur, Roger Barlow, Ju-Young Kim, Miriam Heß, Y. Seino, S. Bettarini, R. de Sangro, M. Nakao, M. Biasini, P. Križan, G. Raven, Alexander Bondar, D. Gamba, R. Sacco, L. Cremaldi, Yu. I. Skovpen, C. P. Shen, K. Honscheid, G. Calderini, Elisa Manoni, R. Kowalewski, N. Arnaud, V.E. Shebalin, M. Heck, L. K. Li, M. V. Purohit, S. Di Carlo, D. M. Asner, K. Hayasaka, Sw. Banerjee, Soumen Paul, M. Uchida, G. Pakhlova, P. R. Burchat, G. Karyan, V. Bhardwaj, C. L. Hsu, J. A. Ernst, S. L. Wu, P. Ongmongkolkul, H. Atmacan, D. B. Macfarlane, Alessandro Pilloni, K. K. Joo, S. Dittrich, D. R. Peimer, Kiyoshi Tanida, Timothy Gershon, D. Aston, L. Li Gioi, A. Garmash, F. Anulli, Z. Doležal, J. M. Roney, Yoshinobu Unno, S. Zakharov, M. Lubej, G. Inguglia, V. Zhukova, M. Merola, A. K. Giri, K. Sumisawa, S. M. Spanier, G. Batignani, M. Masuda, C. L. Davis, M. Fritsch, A. P. Onuchin, L. Sun, Adrian John Bevan, Somnath Choudhury, Leo Piilonen, O. Seon, Frank Simon, D. J. Lange, Matteo Rama, James G. Smith, V. P. Druzhinin, D. M. Wright, M. S. Alam, E. Solovieva, R. Prepost, N. Dash, M. Rozanska, D. Kotchetkov, T. Adye, A. Randle-Conde, T. Julius, M. Verderi, R. Faccini, V. Poireau, T. Sumiyoshi, J. M. Losecco, G. Marchiori, F. C. Porter, Martin Ritter, T. Sanuki, S. Cunliffe, J. Va'Vra, W. S. Lockman, M. Salehi, H. Aihara, George Lafferty, C. P. Jessop, T. Hara, T. Mori, Oliver Grünberg, G. R. Bonneaud, N. K. Nisar, I. Pavelkin, D. Bettoni, Z. P. Zhang, S. Prell, B. G. Pushpawela, A. Gaz, S. H. Robertson, L. Lanceri, Jyoti Prakash Biswal, B. Echenard, M. Davier, J. MacNaughton, A. M. Bakich, W. Dunwoodie, D. Červenkov, Rocky Bala Garg, T. S. Mattison, W. Gradl, E. P. Solodov, I. Garzia, Thomas Latham, C. Patrignani, V. Tisserand, and M. Bračko
Subjects: Quark, Physics, Particle physics, Unitarity, 010308 nuclear & particles physics, Electron–positron annihilation, Hadron, General Physics and Astronomy, Dalitz plot, 01 natural sciences, B-factory, KEKB, 0103 physical sciences, CP violation, 010306 general physics
Abstract: We present first evidence that the cosine of the CP-violating weak phase 2β is positive, and hence exclude trigonometric multifold solutions of the Cabibbo-Kobayashi-Maskawa (CKM) Unitarity Triangle using a time-dependent Dalitz plot analysis of B^{0}→D^{(*)}h^{0} with D→K_{S}^{0}π^{+}π^{-} decays, where h^{0}∈{π^{0},η,ω} denotes a light unflavored and neutral hadron. The measurement is performed combining the final data sets of the BABAR and Belle experiments collected at the ϒ(4S) resonance at the asymmetric-energy B factories PEP-II at SLAC and KEKB at KEK, respectively. The data samples contain (471±3)×10^{6}BB[over ¯] pairs recorded by the BABAR detector and (772±11)×10^{6}BB[over ¯] pairs recorded by the Belle detector. The results of the measurement are sin2β=0.80±0.14(stat)±0.06(syst)±0.03(model) and cos2β=0.91±0.22(stat)±0.09(syst)±0.07(model). The result for the direct measurement of the angle β of the CKM Unitarity Triangle is β=[22.5±4.4(stat)±1.2(syst)±0.6(model)]°. The measurement assumes no direct CP violation in B^{0}→D^{(*)}h^{0} decays. The quoted model uncertainties are due to the composition of the D^{0}→K_{S}^{0}π^{+}π^{-} decay amplitude model, which is newly established by performing a Dalitz plot amplitude analysis using a high-statistics e^{+}e^{-}→cc[over ¯] data sample. CP violation is observed in B^{0}→D^{(*)}h^{0} decays at the level of 5.1 standard deviations. The significance for cos2β>0 is 3.7 standard deviations. The trigonometric multifold solution π/2-β=(68.1±0.7)° is excluded at the level of 7.3 standard deviations. The measurement resolves an ambiguity in the determination of the apex of the CKM Unitarity Triangle.
Published: 2018
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13. Measurement of cos2β in B0→D(*)h0 with D→KS0π+π− decays by a combined time-dependent Dalitz plot analysis of BaBar and Belle data

Author: C. Bünger, T. Matsuda, J. W. Gary, T. S. Mattison, S. H. Kim, S. J. Sekula, A. Jawahery, P. Krokovny, M. Feindt, I. Adachi, D. B. MacFarlane, C. Hearty, P. Goldenzweig, K. H. Kang, K. Cho, S. Sandilya, A. G. Denig, R. F. Schwitters, M. Rozanska, D. Kotchetkov, E. Fioravanti, B. Golob, F. Palombo, T. Lueck, P. Pakhlov, J. B. Kim, K. Yu. Todyshevx, T. Leddig, D. Epifanov, N. K. Nisar, J. S. Lange, Z. C. Huard, V.N. Zhilich, Shih-Chang Lee, W. S. Lockman, M. R. Convery, D. N. Brown, A. Calcaterra, M. Z. Wang, K. Kinoshita, D. J. Summers, A. Filippi, H. Park, A. Bozek, Simon Akar, R. Prepost, R. Mussa, D. Gamba, M. Bellis, A. Ishikawa, F. De Mori, J. E. Fast, Cheng Chen, M. Starič, N. Tasneem, G.V. Russo, J. P. Coleman, F. Anulli, Alessandro Gaz, S. H. Robertson, Aidan Randle-Conde, W. S. Hou, G. J. King, Victoria Zhukova, F. F. Wilson, R. J. Sobie, L. Vitale, B. T. Meadows, P. Križan, G. Raven, Denis Bernard, S. Nishida, K. Miyabayashi, I. Badhrees, R. Ayad, James R. Wilson, V. Bhardwaj, R. Cowan, E. A. Kravchenko, Elisa Guido, J. L. Ritchie, Herbert Koch, T. K. Pedlar, A. P. Onuchin, A. Chen, S. Martellotti, F. Martinez-Vidal, Marco Bomben, M. D. Sokoloff, S. E. Vahsen, A. J. S. Smith, P. R. Burchat, R. Calabrese, C. Cartaro, M. Rotondo, V. Vorobyev, U. Mallik, I. Pavelkin, G. Schnell, D. Cinabro, K. Griessinger, M. Iwasaki, D. Matvienko, P. F. Harrison, G. Cibinetto, A. Oyanguren, E. Luppi, S. Emery, M. Merola, Peter S. Kim, T. S. Miyashita, N. Neri, G. Vasseur, E. Paoloni, D. Y. Kim, B. K. Pal, B. G. Cheon, K. T. Kim, L. M. Cremaldi, R. B. Garg, B. Bhuyan, A. V. Gritsan, Shigeki Hirose, K. T. Flood, A. M. Eisner, Y. Iwasaki, R. Godang, Tao Luo, K. Tanida, F. Di Lodovico, B. G. Fulsom, G. De Nardo, J. Chauveau, M. T. Hedges, A. B. Kaliyar, J. K. Ahn, Y. J. Kwon, G. Eigen, I. M. Nugent, V. E. Blinov, S. Bettarini, T. E. Browder, D. J. Payne, M. Ebert, A. J. Bevan, M. Röhrken, K. Chilikin, H. M. Lacker, Tara Nanut, T. Kuhr, T. A. Shibata, H. Miyata, T. Aushev, R. Sacco, A. J. Schwartz, E. Grauges, V. V. Zhulanov, G. Inguglia, O. Schneider, T. Uglov, V. Savinov, A. Palano, C. P. Jessop, S. M. Spanier, Alessandro Pilloni, J. Ocariz, R. Mizuk, Mario Giorgi, M. Heß, H. Kichimi, E. Won, M. K. Sullivan, Yu. G. Kolomensky, D. W. G. S. Leith, H. Atmacan, J. P. Lees, D. R. Peimer, H. Ono, D. G. Hitlin, Bingran Wang, S. Zakharov, Semen Eidelman, David Hutchcroft, L. Li Gioi, A. Zupanc, Wu S. L., K. Hayasaka, G. Calderini, E. Nakano, F. Simonetto, J. Va’vra, D. S. Chao, M. Davier, R. Cenci, R. Cheaib, R. Waldi, A. Zallo, S. Korpar, V. P. Druzhinin, C. Bozzi, G. Cowan, Noritaka Shimizu, J. M. LoSecco, M. V. Purohit, Douglas Wright, L. Zani, R. Gorodeisky, P. Patteri, M. Fritsch, D. A. Roberts, Yu. I. Skovpen, B. Dey, P. Ongmongkolkul, K. Honscheid, M. Piccolo, F. Forti, J. J. Walsh, R. Kroeger, M. E. Sevior, I. S. Lee, A. M. Lutz, R. J. Barlow, R. Stroili, M. T. Graham, A. Hafner, J. M. Roney, Z. Drásal, J. Albert, K. Senyo, E. M. T. Puccio, X. C. Lou, G. Batignani, V.E. Shebalin, Somnath Choudhury, N. Guttman, A. Kuzmin, J. G. Shiu, G. Wormser, K. K. Joo, Y. Unno, M. Posocco, J. G. Smith, S. Al Said, K. Inami, C. Z. Yuan, J. Cochran, E. Ben-Haim, C. Hast, M. Heck, D. J. Lange, G. Piredda, Hamad Ahmed, W. J. Wisniewski, G. Marchiori, S. Ogawa, G. D. Lafferty, Y. B. Li, H. A. Neal, V. Santoro, J. Libby, M. Lubej, W. Dunwoodie, A. M. Rossi, S. Passaggio, W. Panduro Vazquez, S. Uno, C. Schwanda, Tim Adye, V. B. Golubev, U. Tamponi, Y. Choi, K. J. Nath, G. Casarosa, L. Santelj, E. Waheed, R. D. Kass, A. Roodman, R. Faccini, F. Ferrarotto, A. J. Lankford, F. Le Diberder, S. Jia, R. M. Seddon, J. M. Izen, Crisostomo Sciacca, D. Aston, M. Nayak, M. Uchida, F. Ferroni, A. R. Buzykaev, G. Rizzo, M. Rama, L. Lanceri, So R. Y., A. Beaulieu, Y. Seino, J. A. McKenna, C. H. Cheng, T. J. Gershon, D. Liventsev, Y. Jin, C. H. Wang, S. Paul, Martino Margoni, S. Pardi, T. Müller, K. Sumisawa, D. M. Asner, T. E. Latham, M. Carpinelli, Ju-Young Kim, Maurizio Biasini, D. R. Muller, G. S. Varner, R. de Sangro, Stephen Robert Wagner, Y. Yusa, K. R. Schubert, A. K. Giri, Tamara Vazquez Schroeder, R. Itoh, C. L. Davis, Elisa Manoni, Li L. K., I. M. Peruzzi, Owen Rosser Long, M. Masuda, C. B. Van Hulse, G. B. Mohanty, J. A. Ernst, S. I. Serednyakov, F. Bianchi, L. Sun, S. Dittrich, P. K. Resmi, M. Gelb, Pu Wang, R. Kowalewski, Peter Kodys, A. Garmash, W. W. Jacobs, V. Bansal, G. R. Bonneaud, J. Dorfan, S. Di Carlo, G. Karyan, P. K. Behera, M. Verderi, N. Arnaud, A.E. Bondar, M. Takizawa, C. Touramanis, Z. Doležal, O. Grünberg, P. Taras, E. P. Solodov, O. Seon, Frank Simon, Y. Sakai, S. Prell, I. Garzia, V. Poireau, A. Soffer, A. Lusiani, N. Dash, E. Solovieva, Li Y. B., R. C. Field, G. Finocchiaro, M. S. Alam, S. Cunliffe, B. Oberhof, L. E. Piilonen, G. Pakhlova, R. Kulasiri, T. Hara, T. Julius, W. Gradl, T. Mori, H. Aihara, B. N. Ratcliff, S. Luitz, F. Tenchini, T. Sumiyoshi, Martin Ritter, Z. P. Zhang, T. Sanuki, B. G. Pushpawela, Jyoti Prakash Biswal, D. Bettoni, V. Gaur, M. Nakao, B. Echenard, Florian Urs Bernlochner, J. MacNaughton, C. Patrignani, V. Tisserand, M. Bračko, A. M. Bakich, Sw. Banerjee, G. Simi, D. Červenkov, E. Gabathuler, W. R. Innes, F. C. Porter, M. Chrzaszcz, and C. Voß
Subjects: Physics, Particle physics, Unitarity, Meson, 010308 nuclear & particles physics, Electron–positron annihilation, Hadron, Dalitz plot, 01 natural sciences, B-factory, KEKB, 0103 physical sciences, CP violation, 010306 general physics
Abstract: We report measurements of sin2β and cos2β using a time-dependent Dalitz plot analysis of B0→D(*)h0 with D→KS0π+π- decays, where the light unflavored and neutral hadron h0 is a π0, η, or ω meson. The analysis uses a combination of the final data sets of the BaBar and Belle experiments containing 471×106 and 772×106 BB¯ pairs collected at the ϒ(4S) resonance at the asymmetric-energy B factories PEP-II at SLAC and KEKB at KEK, respectively. We measure sin2β=0.80±0.14(stat)±0.06(syst)±0.03(model) and cos2β=0.91±0.22(stat)±0.09(syst)±0.07(model). The result for the direct measurement of the angle is β=(22.5±4.4(stat)±1.2(syst)±0.6(model))°. The last quoted uncertainties are due to the composition of the D0→KS0π+π- decay amplitude model, which is newly established by a Dalitz plot amplitude analysis of a high-statistics e+e-→cc¯ data sample as part of this analysis. We find the first evidence for cos2β>0 at the level of 3.7 standard deviations. The measurement excludes the trigonometric multifold solution π/2-β=(68.1±0.7)° at the level of 7.3 standard deviations and therefore resolves an ambiguity in the determination of the apex of the CKM Unitarity Triangle. The hypothesis of β=0° is ruled out at the level of 5.1 standard deviations, and thus CP violation is observed in B0→D(*)h0 decays. The measurement assumes no direct CP violation in B0→D(*)h0 decays.
Published: 2018
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14. Measurement of the branching fraction and time-dependent CP asymmetry for B0→J/ψπ0 decays

Author: Pavel Krokovny, S. Cunliffe, Y. Guan, D. Epifanov, J. Libby, K. Trabelsi, M. Merola, Seok Kim, T. K. Pedlar, J. E. Fast, E. Nakano, D. Matvienko, F. Tenchini, Samo Korpar, M. Sumihama, Motoki Iwasaki, H. Hayashii, R. B. Garg, B. Bhuyan, T. Sumiyoshi, Y-J Kwon, B. G. Fulsom, Martin Ritter, R. Mizuk, G. Schnell, K. Chilikin, R. Kroeger, M. E. Sevior, T. Bilka, T. Matsuda, T. Sanuki, T.-A. Shibata, D. M. Asner, G. Pakhlova, H. Miyata, K. Hayasaka, C. Beleño, Y. Sakai, R. Kulasiri, Yang Li, Seema Bahinipati, Bo Wang, Y. Choi, K. J. Nath, V. Savinov, T. Hara, L. Santelj, L. Li Gioi, T. Julius, T. Uglov, M. V. Purohit, H. Ono, K. Inami, M. Nayak, M. Gelb, Z. P. Zhang, B. G. Cheon, C.-L. Hsu, K. Senyo, G. Varner, Y. Seino, M. Z. Wang, K. Kinoshita, Peter Kodys, W. W. Jacobs, A. Kuzmin, M. Uchida, L. K. Li, S. Nishida, S. Ogawa, U. Tamponi, Tagir Aushev, N. Dash, E. Solovieva, E. Prencipe, S. Jia, D. Cinabro, S. Di Carlo, S. C. Lee, G. Russo, H. Park, A. Bozek, K. T. Kim, G. Karyan, Rahul Kumar, A. Garmash, V. Bansal, Z. Natkaniec, Kevin Varvell, C. H. Wang, S. Al Said, D. Kotchetkov, R. Itoh, A. K. Giri, Y. Unno, P. Wang, S. Paul, V. M. Aulchenko, M. Masuda, P. K. Behera, Y. Tao, T. Mori, H. Aihara, X. L. Wang, G. B. Mohanty, R. Ayad, K. Cho, V. Chekelian, Jyoti Prakash Biswal, K. Lalwani, S. Uno, C. Schwanda, S. Uehara, R. Van Tonder, B. K. Pal, V. Gaur, Deepak Kumar Sahoo, L. Cao, Leo Piilonen, D. Joffe, O. Seon, Frank Simon, Vladimir Popov, Somnath Choudhury, S. Pardi, M. Takizawa, John Yelton, Z. Doležal, R. Pestotnik, Victoria Zhukova, A. Chen, Eberhard Widmann, T. Higuchi, D. Červenkov, P. Goldenzweig, S. Sandilya, M. Starič, S. E. Vahsen, V.N. Zhilich, Y. Iwasaki, O. Schneider, M. Bračko, K. Miyabayashi, I. Badhrees, A. J. Schwartz, D. Y. Kim, W. S. Hou, Andrey Sokolov, V. Vorobyev, J. H. Yin, Semen Eidelman, P. C. Lu, A. Ishikawa, B. Golob, M. Nakao, P. Križan, J. Schueler, E. Won, H. Atmacan, and K. Tanida
Subjects: Physics, Particle physics, 010308 nuclear & particles physics, Branching fraction, Electron–positron annihilation, media_common.quotation_subject, Resonance, 01 natural sciences, Asymmetry, Belle experiment, law.invention, KEKB, law, 0103 physical sciences, CP violation, 010306 general physics, Collider, media_common
Abstract: We measure the branching fraction and time-dependent CP-violating asymmetry for B0→J/ψπ0 decays using a data sample of 711 fb-1 collected on the ϒ(4S) resonance by the Belle experiment running at the KEKB e+e- collider. The branching fraction is measured to be B(B0→J/ψπ0)=[1.62±0.11(stat)±0.06(syst)]×10-5, which is the most precise measurement to date. The measured CP asymmetry parameters are S=-0.59±0.19(stat)±0.03(syst) and A=-0.15±0.14(stat)+0.04-0.03(syst). The mixing-induced CP asymmetry (S) differs from the case of no CP violation by 3.0 standard deviations, and the direct CP asymmetry (A) is consistent with zero.
Published: 2018
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15. Measurement of the decays Λc→Σππ at Belle

Author: Tagir Aushev, Y. Onuki, Iki Adachi, H. Miyata, M. Watanabe, Bo Wang, U. Tamponi, V. Gaur, S. Jia, Doo Young Kim, Y. Jin, O. Grzymkowska, C. H. Wang, K. Suzuki, S. Paul, V. M. Aulchenko, L. Li Gioi, J. Libby, D. M. Asner, M. Lubej, K. Hayasaka, A. Kuzmin, H. Ye, M. Nayak, G. Varner, Victoria Zhukova, F. Tenchini, A. B. Kaliyar, M. Niiyama, A. Chen, R. Mussa, A. Garmash, Elisa Guido, Shih-Chang Lee, S. Nishida, Takuro Sanuki, G. Schnell, B. G. Cheon, T. Uglov, D. Kotchetkov, V.N. Zhilich, R. Kulasiri, Z. Natkaniec, V.E. Shebalin, S. Al Said, M. T. Hedges, B. Shwartz, Pavel Krokovny, M. Salehi, T. Iijima, A. Ishikawa, J. Haba, Y. Seino, P. Križan, V. Bansal, Peter Kodys, W. W. Jacobs, Tao Luo, T. Nakano, K. K. Joo, S. Korpar, T. Kuhr, K. Senyo, A. Zupanc, T. Julius, G. Russo, H. Park, A. Bozek, S. Uno, C. Schwanda, K. Chilikin, H. Hayashii, Hyunyong Kim, S. Zakharov, T. Kawasaki, M. Sumihama, Motoki Iwasaki, D. Cinabro, I. Jaegle, Y. Watanabe, H. Kichimi, K. Miyabayashi, I. Badhrees, S. Di Carlo, M. Uchida, Andrey Sokolov, M. Merola, H. Atmacan, T.-A. Shibata, Y. Yusa, G. Karyan, L. K. Li, P. K. Behera, Massimo Berger, M. Takizawa, C. Z. Yuan, H. Ono, R. Mizuk, D. Liventsev, C. P. Shen, Noritaka Shimizu, Phillip Urquijo, M. Starič, Y. B. Li, T. Nanut, V. V. Zhulanov, Seok Kim, A. K. Giri, Y. Choi, K. J. Nath, R. Kroeger, M. E. Sevior, I. S. Lee, E. Won, R. Pestotnik, K. Inami, T. Hara, L. Santelj, A. Rostomyan, Semen Eidelman, X. L. Wang, Y. Sakai, R. Itoh, W. S. Hou, T. Sumiyoshi, Martin Ritter, V. Babu, M. Z. Wang, K. Kinoshita, J. B. Kim, M. Masuda, C. Kiesling, P. Wang, T. Czank, N. Dash, E. Solovieva, G. B. Mohanty, Y. Unno, B. K. Pal, V. Vorobyev, T. Ferber, I. Pavelkin, R. Ayad, K. Cho, C. B. Van Hulse, G. Pakhlova, R. B. Garg, M. Bračko, B. Bhuyan, Leo Piilonen, T. E. Browder, J. K. Ahn, A. J. Schwartz, P. Pakhlov, A. Vossen, A. M. Bakich, V. Savinov, N. K. Nisar, H. K. Moon, O. Seon, Frank Simon, J. S. Lange, Vladimir Popov, N. Gabyshev, D. Červenkov, Eberhard Widmann, J. F. Strube, Dipanwita Dutta, D. Matvienko, Z. P. Zhang, Jyoti Prakash Biswal, M. Nakao, P. Goldenzweig, S. Sandilya, H. Aihara, T. K. Pedlar, Y. Iwasaki, Y. J. Kwon, O. Schneider, B. G. Fulsom, Kevin Varvell, T. Mori, Y. Usov, T. Matsuda, G. Bonvicini, A. Vinokurova, J. G. Shiu, K. H. Kang, D. Epifanov, V. Bhardwaj, M. Gelb, G. Inguglia, S. Okuno, K. T. Kim, Y. Guan, Kiyoshi Tanida, John Yelton, Z. Doležal, and J. E. Fast
Subjects: Physics, KEKB, 010308 nuclear & particles physics, Full data, Electron–positron annihilation, 0103 physical sciences, Pi, Analytical chemistry, 010306 general physics, Lambda, 01 natural sciences
Abstract: We report measurements of the branching fractions of the decays Lambda(+)(c) -> Sigma(+)pi(-)pi(+), Lambda(+)(c) -> Sigma(0)pi(+)pi(0) and Lambda(+)(c) -> Sigma(+)pi(0)pi(0) relative to the reference channel Lambda(+)(c) -> pK(-)p(+). The analysis is based on the full data sample collected at and near the gamma(4S) resonance by the Belle detector at the KEKB asymmetric-energy ethorne-collider, corresponding to an integrated luminosity of 711 fb(-1). We measure B(Lambda(+)(c) -> Sigma(+)pi(-)pi(+))/B(Lambda(+)(c) -> pK(-)pi(+)) = 0.719 +/- 0.003 +/- 0.024, B(Lambda(+)(c) -> Sigma(0) pi(+)pi(0))/B(Lambda(+)(c) -> pK(-)pi(+)) = 0.575 +/- 0.005 +/- 0.036 and B(Lambda(+)(c) -> Sigma(+)pi(0)pi(0))/B(Lambda(+)(c) -> pK(-)pi(+)) = 0.247 +/- 0.006 +/- 0.019. The listed uncertainties are statistical and systematic, respectively.
Published: 2018
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16. Observation of ϒ(2S)→γηb(1S) Decay

Author: L. E. Piilonen, D. Epifanov, B. Pal, T. V. Dong, Y. Choi, K. J. Nath, K. Kinoshita, E. Prencipe, G. Schnell, A. Garmash, T. Iijima, V.N. Zhilich, T. K. Pedlar, Y. Sakai, R. Mussa, C. P. Shen, K. Miyabayashi, I. Badhrees, H. B. Jeon, A. Ishikawa, S. Eidelman, T. Kuhr, T. Julius, M. Nakao, N. K. Nisar, V. Babu, P. Križan, T. Aushev, Soumen Paul, J. H. Yin, S. E. Vahsen, Z. P. Zhang, T. Ferber, H. Park, T. Matsuda, A. Bozek, S. Uno, G. Pakhlova, J. G. Shiu, G. Bonvicini, K. K. Joo, H. K. Moon, S. Cunliffe, R. Kulasiri, J. S. Lange, R. Pestotnik, A. Vinokurova, A. Vossen, X. L. Wang, V. Chekelian, H. Hayashii, G. B. Mohanty, Phillip Urquijo, M. Sumihama, Z. Drásal, R. Van Tonder, S. H. Kim, Eleonora Guido, Frank Simon, P. Krokovny, D. Joffe, Vladimir Popov, B. Bhuyan, Andrey Sokolov, Y. B. Li, K. Cho, V. Zhukova, M. Salehi, P. L. Wang, T. Mori, H. Aihara, Luka Santelj, V. Savinov, S. Hirose, James E. Fast, A. Zupanc, W. Sutcliffe, Jyoti Prakash Biswal, G.V. Russo, V. M. Aulchenko, M. Iwasaki, J. F. Strube, W. S. Hou, B. G. Cheon, L. Li Gioi, Shih-Chang Lee, K. Inami, E. Solovieva, H. J. Kim, Massimo Berger, V. Vorobyev, N. Dash, B. Shwartz, R. Itoh, A. Bondar, F. Tenchini, C. Z. Yuan, S. Korpar, D. Kotchetkov, T. Sumiyoshi, E. Won, Martin Ritter, T. Sanuki, A. Chen, V.E. Shebalin, H. Kichimi, S. Al Said, T. A. Shibata, H. Miyata, Prafulla Kumar Behera, M. Niiyama, C. Schwanda, V. Gaur, R. Mizuk, K. Chilikin, C. Beleño, K. T. Kim, Yoshinobu Unno, S. K. Choi, A. K. Giri, K. Sumisawa, H. Atmacan, M. Takizawa, Z. Doležal, M. Masuda, L. Cao, Peter Kodys, W. W. Jacobs, S. Di Carlo, A. Kuzmin, S. Ogawa, U. Tamponi, S. Jia, C. H. Wang, Tara Nanut, T. Bilka, T. Uglov, M. Watanabe, T. E. Browder, H. Ye, M. Nayak, P. Pakhlov, S. Nishida, Jochen Dingfelder, Z. Natkaniec, R. Ayad, D. Y. Kim, M. Merola, H. Ono, K. Senyo, Vikas Bansal, I. Adachi, J. B. Kim, C. Van Hulse, Jasvinder A. Singh, S. Sandilya, M. Starič, M. Gelb, Tao Luo, K. Tanida, Y. Iwasaki, Y. J. Kwon, O. Schneider, J. Libby, D. M. Asner, K. Hayasaka, Linhu Li, Y. Seino, Bingran Wang, Shoichi Watanuki, D. Cinabro, A. Rabusov, M. Lubej, G. Inguglia, Somnath Choudhury, S. Pardi, S. Okuno, D. Liventsev, Vladimir Zhulanov, Y. Jin, R. Kroeger, M. E. Sevior, I. S. Lee, P. Goldenzweig, J. Haba, T. Kawasaki, M. Uchida, V. Bhardwaj, G. S. Varner, A. Rostomyan, B. G. Fulsom, C. Kiesling, M. Bračko, Rocky Bala Garg, Eberhard Widmann, D. Matvienko, A. M. Bakich, N. Gabyshev, and D. Červenkov
Subjects: Physics, Photon, 010308 nuclear & particles physics, Branching fraction, Electron–positron annihilation, General Physics and Astronomy, 01 natural sciences, Measure (mathematics), law.invention, Nuclear physics, KEKB, law, 0103 physical sciences, 010306 general physics, Collider
Abstract: We report the observation of ϒ(2S)→γηb(1S) decay based on an analysis of the inclusive photon spectrum of 24.7 fb-1 of e+e- collisions at the ϒ(2S) center-of-mass energy collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. We measure a branching fraction of B[ϒ(2S)→γηb(1S)]=(6.1-0.7-0.6+0.6+0.9)×10-4 and derive an ηb(1S) mass of 9394.8-3.1-2.7+2.7+4.5 MeV/c2, where the uncertainties are statistical and systematic, respectively. The significance of our measurement is greater than 7 standard deviations, constituting the first observation of this decay mode.
Published: 2018
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17. Observation of <math><mrow><msup><mrow><mi>e</mi></mrow><mrow><mo>+</mo></mrow></msup><msup><mrow><mi>e</mi></mrow><mrow><mo>−</mo></mrow></msup><mo>→</mo><msup><mrow><mi>π</mi></mrow><mrow><mo>+</mo></mrow></msup><msup><mrow><mi>π</mi></mrow><mrow><mo>−</mo></mrow></msup><msup><mrow><mi>π</mi></mrow><mrow><mn>0</mn></mrow></msup><msub><mrow><mi>χ</mi></mrow><mrow><mi>b</mi><mn>1</mn><mo>,</mo><mn>2</mn></mrow></msub><mo>(</mo><mn>1</mn><mi>P</mi><mo>)</mo></mrow></math> and search for <math><mrow><msup><mrow><mi>e</mi></mrow><mrow><mo>+</mo></mrow></msup><msup><mrow><mi>e</mi></mrow><mrow><mo>−</mo></mrow></msup><mo>→</mo><mi>ϕ</mi><msub><mrow><mi>χ</mi></mrow><mrow><mi>b</mi><mn>1</mn><mo>,</mo><mn>2</mn></mrow></msub><mo>(</mo><mn>1</mn><mi>P</mi><mo>)</mo></mrow></math> at <math><mrow><msqrt><mrow><mi>s</mi></mrow></msqrt><mo>=</mo><mn>10.96</mn><mi>—</mi><mn>11.05</mn><mtext> </mtext><mtext> </mtext><mi>GeV</mi></mrow></math>

Author: K. T. Kim, P. Goldenzweig, S. K. Choi, S. Sandilya, M. Starič, R. Kroeger, M. E. Sevior, I. S. Lee, M. Gelb, M. Takizawa, B. G. Cheon, G. Schnell, T. Iijima, Z. Doležal, Jyoti Prakash Biswal, J. Haba, U. Tamponi, T. Kuhr, S. Korpar, Tao Luo, K. Tanida, V. Gaur, M. Nakao, R. Ayad, R. Mussa, H. B. Jeon, N. Dash, T. Matsuda, M. Niiyama, Y. Iwasaki, Y. J. Kwon, J. G. Shiu, D. Cinabro, A. Garmash, Phillip Urquijo, M. Lubej, O. Schneider, Y. B. Li, S. Nishida, S. Jia, G. Inguglia, A. M. Bakich, P. Chang, A. Ishikawa, T. Mori, H. Aihara, J. H. Yin, V. Bansal, T.-A. Shibata, Somnath Choudhury, A. Vinokurova, D. Matvienko, D. Kotchetkov, J. Libby, S. Ogawa, Shigeki Hirose, C. H. Wang, X. L. Wang, Z. P. Zhang, N. Gabyshev, D. Červenkov, V. Chekelian, S. Paul, P. Krokovny, B. Golob, F. Tenchini, I. Adachi, K. H. Kang, K. Cho, D. Epifanov, M. Merola, N. K. Nisar, M. Nayak, R. Van Tonder, B. K. Pal, S. Eidelman, Y. Seino, P. K. Behera, C. P. Shen, Seok Kim, Shoichi Watanuki, S. Pardi, H. K. Moon, Motoki Iwasaki, P. Pakhlov, M. Salehi, J. S. Lange, V. Babu, D. M. Asner, J. E. Fast, Peter Kodys, W. W. Jacobs, P. Križan, Doyen Sahoo, S. Di Carlo, T. Sumiyoshi, Kohei Ogawa, Ya-Qiu Jin, T. Aushev, K. Inami, G.V. Russo, D. Joffe, T. K. Pedlar, C. Kiesling, V.N. Zhilich, S. Al Said, T. Ferber, R. Mizuk, W. S. Hou, T. Bilka, T. Sanuki, H. Park, A. Bozek, C. B. Van Hulse, Andrey Sokolov, H. Miyata, Tara Nanut, M. Z. Wang, K. Kinoshita, H. Ono, V. Vorobyev, O. Seon, Frank Simon, C. Beleño, Bo Wang, Shih-Chang Lee, M. Bračko, I. Jaegle, Vladimir Popov, S. Cunliffe, R. B. Garg, T. Uglov, B. Bhuyan, J. C. Dingfelder, I. Badhrees, K. Hayasaka, A. Bobrov, L. Li Gioi, B. G. Fulsom, Eberhard Widmann, K. Nishimura, E. Nakano, T. E. Browder, E. Won, Y. Sakai, Z. Natkaniec, V. V. Zhulanov, S. Uno, L. E. Piilonen, G. Pakhlova, V. Savinov, C. Schwanda, H. Ye, R. Kulasiri, T. Julius, Y. Unno, J. B. Kim, B. Shwartz, K. Senyo, E. Solovieva, T. Kawasaki, W. Sutcliffe, H. Hayashii, A. K. Giri, D. Y. Kim, M. Uchida, L. K. Li, M. Masuda, G. B. Mohanty, V. M. Aulchenko, D. Liventsev, G. S. Varner, L. Cao, R. Itoh, A. Rostomyan, P. Wang, K. Chilikin, R. Pestotnik, H. Yamamoto, C. Z. Yuan, E. Prencipe, Victoria Zhukova, A. Chen, Z. Drásal, K. K. Joo, Y. Yusa, Seema Bahinipati, T. V. Dong, Y. Choi, K. J. Nath, and L. Santelj
Subjects: Physics, KEKB, 010308 nuclear & particles physics, Collider physics, Electron–positron annihilation, 0103 physical sciences, Center (category theory), Analytical chemistry, Pi, 010306 general physics, 01 natural sciences, Omega
Abstract: We report searches for the processes e+e−→π+π−π0χbJ and e+e−→ϕχbJ (J=1, 2) based on data samples collected by the Belle experiment at the KEKB collider. We report the first observation of the process e+e−→(π+π−π0)non−ωχb1 and first evidence for e+e−→ωχbJ in the vicinity of the ϒ(11020) resonance, with center-of-mass energies from 10.96 to 11.05 GeV. The significances for (π+π−π0)non−ωχb1 and ωχbJ are greater than 5.3σ and 4.0σ, respectively. We also investigate the energy dependence of the e+e−→π+π−π0χbJ cross section, but we cannot determine whether the contributions are from the ϒ(10860) and ϒ(11020) resonances or nonresonant continuum processes. The signals for e+e−→ϕχbJ are not significant, and the upper limits of the Born cross sections at the 90% confidence level are 0.7 and 1.0 pb for e+e−→ϕχb1 and ϕχb2, respectively, for center-of-mass energies from 10.96 to 11.05 GeV.
Published: 2018

18. Inclusive study of bottomonium production in association with an $$\eta $$ η meson in $$e^+e^-$$ e + e - annihilations near $$\varUpsilon (5S)$$ Υ ( 5 S )

Author: G. Schnell, Y. Iwasaki, Y. J. Kwon, S. Uehara, O. Schneider, J. Libby, D. M. Asner, K. Hayasaka, H. Ye, B. G. Fulsom, S. Al Said, Yang Li, Y. Choi, K. J. Nath, E. Won, S. Sandilya, B. Bhuyan, R. Pestotnik, M. Gelb, M. Nayak, Y. Sakai, N. Dash, A. Chen, H. Hayashii, T. Sumiyoshi, T. E. Browder, H. Aihara, G. Inguglia, V. Zhukova, T. K. Pedlar, D. Matvienko, Z. Drásal, Martin Ritter, S. Zakharov, D. Kotchetkov, T. Sanuki, Soumen Paul, V. Savinov, M. Uchida, L. K. Li, Andrey Sokolov, C. Schwanda, D. Cinabro, M. Salehi, H. Ono, M. Watanabe, B. Pal, X. L. Wang, S. Okuno, V. Bhardwaj, U. Tamponi, R. Mizuk, Phillip Urquijo, James E. Fast, V. Babu, Massimo Berger, K. K. Joo, M. Z. Wang, K. Kinoshita, T. Czank, E. Solovieva, Semen Eidelman, T. Julius, R. Mussa, T. Luo, I. Jaegle, H. B. Jeon, M. Iwasaki, J. Haba, A. Ishikawa, B. G. Cheon, V. Gaur, Y. Yusa, Leo Piilonen, Y. Seino, P. Križan, Y. Jin, C. H. Wang, Iki Adachi, Doo Young Kim, M. Takizawa, A. Vossen, C. Z. Yuan, P. Wang, K. Senyo, S. Cunliffe, T. Ferber, F. Tenchini, R. Itoh, O. Seon, J. B. Kim, Vikas Bansal, S. Korpar, M. Bračko, Yoshinobu Unno, C. Van Hulse, H. K. Moon, G. Varner, A. M. Bakich, N. Shimizu, R. Ayad, K. Cho, Pavel Krokovny, A. Bozek, E. Widmann, Z. Natkaniec, Peter Kodys, K. Trabelsi, G.V. Russo, C. P. Shen, K. Chilikin, S. Di Carlo, T. Hara, N. Gabyshev, D. Červenkov, T. Kawasaki, W. S. Hou, M. T. Hedges, P. Pakhlov, Tara Nanut, T. Uglov, T. Mori, V. Vorobyev, K. Inami, H. Kichimi, V.E. Shebalin, Bingran Wang, M. Masuda, A. Rostomyan, S. Nishida, B.A. Shwartz, Jyoti Prakash Biswal, H. Park, M. Starič, D. Liventsev, Vladimir Zhulanov, D. Epifanov, V.N. Zhilich, R. Kroeger, M. E. Sevior, I. S. Lee, P. Goldenzweig, A. Garmash, Tagir Aushev, J. F. Strube, Y. Onuki, M. Merola, H. J. Kim, V.M. Aulchenko, I. Badhrees, E. L. Barberio, N. K. Nisar, Z. P. Zhang, K. T. Kim, R. Kulasiri, G. Pakhlova, Shih-Chang Lee, Y. Watanabe, T. Matsuda, S. Uno, L. Li Gioi, A. Vinokurova, J. G. Shiu, S. H. Kim, K. H. Kang, H. Atmacan, A.E. Bondar, Kiyoshi Tanida, Z. Doležal, A. Zupanc, T. A. Shibata, H. Miyata, Prafulla Kumar Behera, Rocky Bala Garg, Gagan Bihari Mohanty, and Elisa Guido
Subjects: Physics, Particle physics, Physics and Astronomy (miscellaneous), Meson, 010308 nuclear & particles physics, Electron–positron annihilation, Hadron, Quarkonium, 01 natural sciences, Belle experiment, Particle decay, KEKB, 0103 physical sciences, High Energy Physics::Experiment, Production (computer science), Nuclear Experiment, 010306 general physics, Engineering (miscellaneous)
Abstract: We study bottomonium production in association with an $$\eta $$ meson in $$e^+e^-$$ annihilations near the $$\varUpsilon (5S)$$ , at a centre-of-mass energy of $$\sqrt{s}=10.866$$ GeV. The results are based on the 121.4 fb $$^{-1}$$ data sample collected by the Belle experiment at the asymmetric-energy KEKB collider. Only the $$\eta $$ meson is reconstructed and the missing-mass spectrum of $$\eta $$ candidates is investigated. We observe the $$e^+e^-\rightarrow \eta \varUpsilon _J(1D)$$ process and find evidence for the $$e^+e^-\rightarrow \eta \varUpsilon (2S)$$ process, while no significant signals of $$\varUpsilon (1S)$$ , $$h_b(1P)$$ , nor $$h_b(2P)$$ are found. Cross sections for the studied processes are reported.
Published: 2018
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19. Search for ϒ(1S,2S)→Zc+Zc(′)− and e+e−→Zc+Zc(′)− at s=10.52 , 10.58, and 10.867 GeV

Author: Pavel Krokovny, Shih-Chang Lee, Suyong Choi, A. K. Giri, U. Tamponi, M. Starič, M. Sumihama, Motoki Iwasaki, B. Shwartz, S. Uno, K. Trabelsi, E. Nakano, Y. J. Kwon, J. Libby, D. M. Asner, C. Schwanda, D. Cinabro, C. P. Shen, M. Lubej, K. Hayasaka, R. Kroeger, M. E. Sevior, I. S. Lee, A. Garmash, S. Jia, Seok Kim, M. Masuda, Tagir Aushev, O. Schneider, G.V. Russo, A. Zupanc, V. M. Aulchenko, V. Bansal, K. Kinoshita, V. Babu, B. G. Fulsom, Meng Wang, Vladimir Popov, Y. Jin, R. Mussa, H. B. Jeon, J. B. Kim, S. Nishida, A. Ishikawa, M. Merola, S. Paul, T. Ferber, W. S. Hou, Y. Seino, B. G. Cheon, R. Kulasiri, Jyoti Prakash Biswal, Elisa Guido, G. Schnell, T. Iijima, J. E. Fast, Iki Adachi, P. Križan, V.E. Shebalin, M. Uchida, Z. Natkaniec, C. Z. Yuan, Doo Young Kim, K. Chilikin, Tara Nanut, S. Pardi, S. Okuno, Zhicai Zhang, T. Kuhr, V. Vorobyev, C. B. Van Hulse, L. K. Li, P. Goldenzweig, S. Sandilya, K. T. Kim, T.-A. Shibata, C. Beleño, Andrey Sokolov, G. Pakhlova, T. Uglov, J. Haba, D. Liventsev, T. Bilka, V. V. Zhulanov, M. Salehi, Tao Luo, V. Gaur, T. K. Pedlar, T. Kumita, T. Julius, M. Nakao, M. Watanabe, K. Inami, Semen Eidelman, M. T. Hedges, S. Korpar, Peter Kodys, W. W. Jacobs, J. MacNaughton, Chunjie Wang, S. Di Carlo, G. Karyan, Shigeki Hirose, T. Matsuda, L. Li Gioi, G. Inguglia, H. Aihara, T. Sumiyoshi, Young-Il Choi, Martin Ritter, R. Itoh, Phillip Urquijo, Kiyoshi Tanida, P. Wang, T. Sanuki, S. Ogawa, H. Miyata, Prafulla Kumar Behera, Y. B. Li, F. Tenchini, Somnath Choudhury, G. Varner, H. Hayashii, Hyunyong Kim, S. Zakharov, Z. Doležal, H. Ye, A. Vinokurova, J. G. Shiu, S. Cunliffe, P. Pakhlov, V.N. Zhilich, Y. Usov, M. Gelb, Bo Wang, H. Ono, I. Jaegle, K. Miyabayashi, I. Badhrees, K. Senyo, E. Won, T. Kawasaki, R. Mizuk, R. Pestotnik, H. K. Moon, J. S. Lange, M. Niiyama, Yang Li, M. Nayak, K. J. Nath, T. Hara, L. Santelj, Victoria Zhukova, R. Ayad, K. Cho, Y. Sakai, A. Chen, M. Takizawa, N. Dash, E. Solovieva, Leo Piilonen, A. Vossen, Frank Simon, D. Kotchetkov, Rocky Bala Garg, Eberhard Widmann, J. F. Strube, B. Bhuyan, V. Savinov, Samo Stanič, A. Rostomyan, X. L. Wang, V. Chekelian, B. K. Pal, C. Kiesling, M. Bračko, H. Park, A. Bozek, N. Gabyshev, D. Červenkov, and S. Al Said
Subjects: Physics, KEKB, Annihilation, 010308 nuclear & particles physics, Branching fraction, 0103 physical sciences, Analytical chemistry, High Energy Physics::Experiment, 010306 general physics, 01 natural sciences
Abstract: The first search for double charged charmoniumlike state production in gamma (IS) and gamma (2S) decays and in e(+) e(-) annihilation at root s = 10.52, 10.58, and 10.867 GcV is conducted using data collected with the Belle detector at the KEKB asymmetric energy electron-positron collider. No significant signals are observed in any of the studied modes, and the 90% credibility level upper limits on their product branching fractions in gamma(1S) and gamma(2S) decays [B(gamma(1S, 2S) -> Z(c)(+)Z(c)((')-)) x B(Z(c)(+) -> pi(+) + c (c) over bar ) (c (c) over bar = J / psi, chi(c1) (1P), psi(2S))] and the product of Born cross section and branching fraction for e(+)e(-) -> Z(c)(+)Z(c)((')-)) (sigma(e(+)e(-) -> Z(c)(+)Z(c)((')-)) x B(Z(c)(+) -> pi(+) + c (c) over bar )) at root s = 10.52, 10.58, and 10.867 GeV are determined. Here, Z(c) refers to the Z(c) (3900) and Z(c) (4200) observed in the pi J/psi final state, the Z(c1)(4050) and Z(c2)(4250) in the pi chi(c1)(1P) final state, and the Z(c)(4050) and Z(c)(4430) in the pi psi(2S) final state.
Published: 2018
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20. Measurement of time-dependent CP asymmetries in B0→KS0ηγ decays

Author: U. Tamponi, S. Jia, Soumen Paul, H. Aihara, Tagir Aushev, Y. Jin, C. H. Wang, Elisa Guido, M. Iwasaki, R. Ayad, K. Cho, T. Hara, G. Schnell, T. Iijima, H. Ye, Y. Usov, Byung Gu Cheon, I. Jaegle, T. Matsuda, S. Uno, T. Bilka, V.M. Aulchenko, Jyoti Prakash Biswal, Leo Piilonen, M. Watanabe, T. Kuhr, R. Itoh, A. Vossen, A. B. Kaliyar, S. Pardi, Yang Li, H. K. Moon, J. G. Shiu, J. S. Lange, S. Korpar, Peter Kodys, W. W. Jacobs, Pavel Krokovny, Frank Simon, J. MacNaughton, V.E. Shebalin, Andrey Sokolov, H. J. Kim, S. H. Kim, Y. Choi, K. J. Nath, M. Uchida, L. Santelj, L. K. Li, T. Nanut, R. Kulasiri, A. J. Schwartz, Dipak Kumar Sahoo, B. Pal, K. Trabelsi, Z. P. Zhang, W. S. Hou, S. Okuno, S. Di Carlo, A. Rostomyan, C. P. Shen, M. Sumihama, V. Gaur, H. Ono, R. Mizuk, G. Karyan, C. Z. Yuan, Y. Sakai, V. Chekelian, V. Vorobyev, V. Babu, S. Sandilya, S. Cunliffe, Phillip Urquijo, K. Senyo, K. Chilikin, E. Solovieva, N. Dash, Vikas Bansal, T. Ferber, S. Ogawa, Z. Natkaniec, M. Gelb, T. K. Pedlar, T. Kumita, Y. B. Li, G. Varner, E. Widmann, James E. Fast, G. B. Mohanty, E. Nakano, F. Tenchini, V.N. Zhilich, C. Beleño, D. Kotchetkov, C. Van Hulse, Shih-Chang Lee, Iki Adachi, P. Pakhlov, M. T. Hedges, Doo Young Kim, Y. Yusa, S. Al Said, Hitoshi Yamamoto, G. Inguglia, P. Wang, V. Zhukova, J. Haba, N. Gabyshev, D. Červenkov, Semen Eidelman, M. Takizawa, M. Salehi, K. Inami, Y. Iwasaki, Y. J. Kwon, R. Mussa, H. B. Jeon, K. Miyabayashi, J. B. Kim, E. Won, N. Shimizu, S. Nishida, R. Pestotnik, T. Uglov, O. Schneider, H. Nakano, I. Badhrees, G. Russo, H. Park, A. Ishikawa, Tao Luo, B. G. Fulsom, A. Bozek, C. Schwanda, Y. Seino, M. Nakao, A. K. Giri, K. Sumisawa, P. Križan, D. Cinabro, M. Nayak, C. Kiesling, Somnath Choudhury, B. Bhuyan, M. Masuda, S. Hirose, T. Kawasaki, Bingran Wang, T. Sumiyoshi, V. Savinov, J. Libby, D. M. Asner, M. Lubej, K. Hayasaka, J. F. Strube, M. Bračko, Xuejun Wang, Martin Ritter, B.A. Shwartz, Rocky Bala Garg, T. Sanuki, H. Hayashii, M. Starič, D. Liventsev, M. Z. Wang, K. Kinoshita, Vladimir Zhulanov, R. Kroeger, M. E. Sevior, I. S. Lee, P. Goldenzweig, Vladimir Popov, T. Julius, Samo Stanič, Kiyoshi Tanida, Z. Doležal, K. T. Kim, S. K. Choi, T. A. Shibata, H. Miyata, Prafulla Kumar Behera, A. Garmash, S. Zakharov, A. Zupanc, M. Merola, Y. Guan, M. Niiyama, G. Pakhlova, and L. Li Gioi
Subjects: Physics, Particle physics, Annihilation, 010308 nuclear & particles physics, Detector, Resonance, 01 natural sciences, Symmetry (physics), law.invention, KEKB, law, 0103 physical sciences, CP violation, High Energy Physics::Experiment, Invariant mass, Astrophysics::Earth and Planetary Astrophysics, Nuclear Experiment, 010306 general physics, Collider, Astrophysics::Galaxy Astrophysics
Abstract: We report a measurement of time-dependent CP violation parameters in B0→KS0ηγ decays. The study is based on a data sample, containing 772×106BB¯ pairs, that was collected at the ϒ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We obtain the CP violation parameters of S=-1.32±0.77(stat)±0.36(syst) and A=-0.48±0.41(stat)±0.07(syst) for the invariant mass of the KS0η system up to 2.1 GeV/c2.
Published: 2018
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21. Production cross sections of hyperons and charmed baryons from e+e− annihilation near s=10.52 GeV

Author: D. Matvienko, K. Chilikin, Kiyoshi Tanida, T. Luo, Y. Watanabe, D. M. Asner, K. Hayasaka, Z. Doležal, J. Libby, H. J. Kim, D. Dutta, P. Kodyš, Hitoshi Miyata, R. Mussa, E. Nakano, S. Uno, Y. Yusa, V. Chekelian, Minu Kim, Y. Choi, Jyoti Prakash Biswal, W. W. Jacobs, G. Bonvicini, C. H. Wang, B. G. Cheon, T. Uglov, Y. Unno, A. Sokolov, R. Itoh, S. Sandilya, D. Joffe, C. H. Li, R. Gillard, S. Pardi, K. T. Kim, Meng Wang, L. Santelj, Leo Piilonen, V. Bansal, Semen Eidelman, R. Mizuk, H. K. Moon, C. Van Hulse, K. J. Nath, A. Vossen, M. Sumihama, V. Shebalin, J. Haba, H. Sahoo, E. Barberio, R. Seidl, Li-Xin Li, Frank Simon, T. K. Pedlar, B. Bhuyan, P. Pakhlov, V. Zhilich, Zhengkang Zhang, T. Nanut, S. Uehara, Toru Iijima, V. Babu, S. Di Carlo, G. Karyan, H. Hayashii, S. Nishida, H. Farhat, T. Julius, Iki Adachi, Doo Young Kim, K. Miyabayashi, V. Bhardwaj, Pavel Krokovny, P. Wang, M. Masuda, V. Zhulanov, T. Matsuda, G. Schnell, T. Ferber, M. Uchida, S. H. Kim, Z. Natkaniec, B. Pal, S. Al Said, A. Ishikawa, H. Park, K. Senyo, I. Jaegle, Y. Kato, B. Shwartz, I. Badhrees, V. Savinov, Y. Seino, M. Nakao, A. M. Bakich, K. K. Joo, Tagir Aushev, A. Zupanc, J. S. Lange, K. Cho, C. Pulvermacher, M. C. Chang, D. Liventsev, T. A. Shibata, M. Ritter, N. Gabyshev, B. G. Fulsom, R. Kulasiri, H. Aihara, O. Schneider, N. K. Nisar, Y. J. Kim, A. Bobrov, J. E. Fast, I. S. Lee, K. Kinoshita, A. Bozek, V. Aulchenko, Takao Mori, A. Garmash, Y-J Kwon, M. Starič, R. Ayad, M. Niiyama, N. Dash, C. Z. Yuan, K. M. Williams, E. Solovieva, T. Sumiyoshi, M. Berger, K. Inami, C. Schwanda, M. E. Sevior, Y. Yamashita, E. Widmann, F. Tenchini, S. Ogawa, D. Cinabro, Y. Sato, T. Hara, V. Gaur, A. Kuzmin, Y. Jin, P. Križan, H. Ye, J. B. Kim, Y. Iwasaki, A. Chen, G. Varner, D. Kotchetkov, D. Červenkov, G. Pakhlova, L. Li Gioi, M. Merola, Z. Drásal, P. Katrenko, C. P. Shen, J. G. Shiu, T. Nakano, M. Nayak, T. E. Browder, R. Chistov, P. Goldenzweig, E. Won, H. Ono, M. Bračko, M. Takizawa, Yang Li, and Y. Sakai
Subjects: Physics, Particle physics, Annihilation, Meson, 010308 nuclear & particles physics, Electron–positron annihilation, Nuclear Theory, High Energy Physics::Phenomenology, Hyperon, 01 natural sciences, Baryon, Nuclear physics, Diquark, Charmed baryons, KEKB, 0103 physical sciences, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics
Abstract: We measure the inclusive production cross sections of hyperons and charmed baryons from e(+)e(-) annihilation using a 800 fb(-1) data sample taken near the gamma(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The feed-down contributions from heavy particles are subtracted using our data, and the direct production cross sections are presented for the first time. The production cross sections divided by the number of spin states for S = -1 hyperons follow an exponential function with a single slope parameter except for the Sigma(1385)(+) resonance. Suppression for Sigma(1385)(+) and Xi(1530)(0) hyperons is observed. Among the production cross sections of charmed baryons, a factor of 3 difference for Lambda(+)(c) states over Sigma(c) states is observed. This observation suggests a diquark structure for these baryons.
Published: 2018
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22. Search for CP violation in the D+→π+π0 decay at Belle

Author: H. J. Kim, M. Nayak, C. H. Wang, C. Van Hulse, K. T. Kim, A. Rostomyan, D. Joffe, B. K. Pal, Kiyoshi Tanida, Jyoti Prakash Biswal, K. Prasanth, Z. Doležal, T. Uglov, P. K. Resmi, A. Zupanc, M. Gelb, J. S. Lange, D. Dutta, E. Guido, H. B. Jeon, Pavel Krokovny, V. Zhukova, P. Goldenzweig, A. Ishikawa, V. Savinov, J. H. Kang, S. Sandilya, Y. Yamashita, M. Iwasaki, Prafulla Kumar Behera, Y. Choi, M. Nakao, V. Shebalin, A. B. Kaliyar, R. Pestotnik, Junho Kim, T. Julius, K. Cho, M. Masuda, A. Kuzmin, T. Kawasaki, D. Greenwald, H. Ye, V. Bansal, E. Won, Wei-Shu Hou, L. K. Li, R. Kroeger, T. Ferber, D. Liventsev, S. Jia, H. Park, Zhengkang Zhang, D. Matvienko, V. Popov, G. Pakhlova, D. Y. Kim, B. Shwartz, T. Nanut, M. Berger, O. Schneider, W. Ostrowicz, C. Z. Yuan, E. Nakano, M. Niiyama, G. Russo, Iki Adachi, S. E. Vahsen, L. Santelj, P. Pakhlov, Samo Korpar, D. Epifanov, J. Libby, S. Pardi, T. Horiguchi, I. Badhrees, N. K. Nisar, A. Sokolov, A. Garmash, Y. Guan, K. Trabelsi, Eberhard Widmann, J. F. Strube, N. Gabyshev, Phillip Urquijo, M. Ritter, V. Zhilich, Y. Jin, M. Sumihama, S. Nishida, S. Ogawa, M. Salehi, G. Schnell, T. E. Browder, B. G. Fulsom, Y. Sakai, V. Bhardwaj, L. Li Gioi, F. Tenchini, M. T. Hedges, J. Haba, Chawon Park, Sayantan Choudhury, P. Križan, E. Waheed, V. Babu, S. Di Carlo, Z. Natkaniec, A. Chen, V. V. Zhulanov, K. Senyo, Y. Ono, D. M. Asner, M. Lubej, K. Hayasaka, K. Kinoshita, G. Karyan, K. Inami, J. Rauch, P. Wang, D. Kotchetkov, R. Itoh, Takao Mori, W. W. Jacobs, B. G. Cheon, Y. Yusa, H. Ono, O. Seon, R. Mizuk, Y. Seino, S. Uno, R. Ayad, M. Mrvar, Semen Eidelman, M. Takizawa, T. Sumiyoshi, C. Pulvermacher, S. Okuno, D. Červenkov, H. Hayashii, P. Kodyš, Hitoshi Miyata, S. Zakharov, A. Bobrov, H. Aihara, M. Merola, S. H. Kim, C. Kiesling, P. Katrenko, T. Sanuki, Y. Unno, B. Golob, K. Chilikin, Kevin Varvell, T. Luo, V. Gaur, U. Tamponi, M. Bračko, G. B. Mohanty, Y-J Kwon, S. Bahinipati, C. P. Shen, J. G. Shiu, M. Starič, Y. Usov, M. E. Sevior, G. Varner, Y. Watanabe, S. Al Said, T. Kuhr, R. Kumar, R. Kulasiri, K. H. Kang, A. M. Bakich, K. K. Joo, T. A. Shibata, Y. J. Kim, C. Schwanda, D. Cinabro, S. Stanič, Z. Drásal, T. Aziz, K. J. Nath, Ihn Sik Seong, M. Uchida, H. Atmacan, J. E. Fast, Meng Wang, Bingran Wang, A. J. Schwartz, A. Bozek, N. Dash, E. Solovieva, K. Miyabayashi, T. Matsuda, S. Paul, Leo Piilonen, Frank Simon, and H. Yamamoto
Subjects: Physics, Particle physics, Meson, 010308 nuclear & particles physics, Branching fraction, Electron–positron annihilation, 01 natural sciences, Belle experiment, law.invention, KEKB, law, 0103 physical sciences, CP violation, High Energy Physics::Experiment, Charm (quantum number), 010306 general physics, Collider
Abstract: We search for CP violation in the charged charm meson decay D+ -> pi(+)pi(0), based on a data sample corresponding to an integrated luminosity of 921 fb(-1) collected by the Belle experiment at the KEKB e(+)e(-) asymmetric-energy collider. The measured CP-violating asymmetry is [+2.31 +/- 1.24(stat) +/- 0.23(syst)] %, which is consistent with the standard model prediction and has a significantly improved precision compared to previous results.
Published: 2018
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23. Measurement of the decays B→ηℓνℓ and B→η′ℓνℓ in fully reconstructed events at Belle

Author: L. Li Gioi, Y. Yamashita, K. Kinoshita, H. Ye, E. Nakano, B. G. Cheon, Meng Wang, S. Al Said, J. G. Shiu, Phillip Urquijo, U. Tamponi, Y. B. Li, C. B. Van Hulse, Y. Sakai, S. Okuno, S. Korpar, Victoria Zhukova, P. Goldenzweig, S. Sandilya, H. Hayashii, G. Schnell, A. Chen, M. Masuda, C. H. Wang, S. Ogawa, T. Iijima, F. Tenchini, T. K. Pedlar, M. J. Kim, T. Sumiyoshi, J. E. Fast, N. Dash, E. Solovieva, S. Uno, M. T. Hedges, Martin Ritter, Kevin Varvell, C. Schwanda, H. Miyata, M. Starič, D. Kotchetkov, T. Sanuki, Y. J. Kim, L. E. Piilonen, R. Kulasiri, T.-A. Shibata, J. C. Dingfelder, V. Babu, T. Aushev, A. M. Bakich, D. Cinabro, A. Zupanc, M. Salehi, A. Frey, T. Ferber, M. E. Sevior, I. S. Lee, D. Joffe, G. Inguglia, V.N. Zhilich, Peter Kodys, T. Mori, H. Aihara, Y. Usov, V.E. Shebalin, Jyoti Prakash Biswal, Tao Luo, K. Tanida, N. Gabyshev, D. Červenkov, R. Chistov, A. Bobrov, R. Ayad, O. Seon, Frank Simon, S. Di Carlo, K. Inami, G. Karyan, Y. Watanabe, D. M. Asner, R. Pestotnik, J. Libby, M. Lubej, T. Nanut, K. Miyabayashi, V. Gaur, I. Badhrees, H. Ono, Y. Iwasaki, C. Beleño, D. Matvienko, Y. Seino, M. Nakao, M. Nayak, T. Uglov, Y. Unno, O. Schneider, M. Takizawa, Ya-Qiu Jin, M. Bračko, Eberhard Widmann, H. Farhat, John Yelton, Z. Doležal, J. B. Kim, K. T. Kim, R. Gillard, S. K. Choi, Z. P. Zhang, H. B. Jeon, A. Ishikawa, P. Križan, K. K. Joo, Chawon Park, Y. Choi, V. V. Zhulanov, K. J. Nath, T. Hara, Y. Yook, S. Nishida, B. K. Pal, S. Eidelman, D. Y. Kim, H. Park, T. Matsuda, B. Bhuyan, B. G. Fulsom, T. E. Browder, A. Vinokurova, P. Krokovny, K. H. Kang, K. Cho, M. Uchida, D. Liventsev, G. S. Varner, R. Itoh, P. Wang, K. Senyo, W. S. Hou, V. Vorobyev, C. W. Park, E. Won, H. K. Moon, A. Garmash, V. Bansal, and P. K. Behera
Subjects: Physics, Particle physics, Meson, 010308 nuclear & particles physics, Branching fraction, Electron–positron annihilation, Eta meson, 01 natural sciences, Belle experiment, KEKB, 0103 physical sciences, High Energy Physics::Experiment, B meson, Nuclear Experiment, 010306 general physics, Lepton
Abstract: We report branching fraction measurements of the decays B+ -> eta l(+)v(l) and B+ -> eta'l(+)v(l) based on 711 fb(-1) of data collected near the (sic)(4S) resonance with the Belle experiment at the KEKB asymmetric-energy e(+)e(-) collider. This data sample contains 772 million B (B) over bar events. One of the two B mesons is fully reconstructed in a hadronic decay mode. Among the remaining ("signal-B") daughters, we search for the eta meson in two decay channels, eta -> gamma gamma and eta -> pi(+)pi(-)pi(0), and reconstruct the eta' meson in eta' -> eta pi(+)pi(-) with subsequent decay of the eta into gamma gamma Combining the two. modes and using an extended maximum likelihood, the B+ -> eta l(+)v(l) branching fraction is measured to be (4.2 +/- 1.1 (stat.) +/- 0.3 (syst.)) x 10(-5). For B+ -> eta l(+)v(l),we observe no significant signal and set an upper limit of 0.72 x 10(-4) at 90% confidence level.
Published: 2017
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24. Search for B→hνν¯ decays with semileptonic tagging at Belle

Author: Jyoti Prakash Biswal, Chawon Park, Tao Luo, V. V. Zhulanov, Tariq Aziz, Y. Yook, Elisa Guido, G. Schnell, A. Garmash, J. Libby, M. Lubej, B. G. Cheon, D. Y. Kim, H. Ono, B. Bhuyan, B. G. Fulsom, R. Mussa, H. B. Jeon, A. Ishikawa, T. E. Browder, Seema Bahinipati, M. Z. Wang, K. Kinoshita, P. Križan, M. Uchida, V. Gaur, L. K. Li, Y. Choi, K. J. Nath, T. Hara, L. Santelj, M. Nakao, D. Liventsev, J. E. Fast, V. Bansal, T. Kuhr, Y. Seino, Y. Iwasaki, M. T. Prim, Y. Sakai, A. J. Schwartz, Y. J. Kwon, Y. Watanabe, M. Masuda, A.E. Bondar, Z. Natkaniec, G. B. Mohanty, G. S. Varner, H. Kichimi, Toru Iijima, M. T. Hedges, O. Schneider, V. Savinov, D. Cinabro, S. Wehle, T. K. Pedlar, G. Inguglia, T. Tsuboyama, Y. Unno, K. Trabelsi, R. Itoh, M. Takizawa, P. K. Behera, K. M. Williams, K. Chilikin, R. Ayad, A. Zupanc, P. Chang, J. Kahn, P. Wang, P. Goldenzweig, C. P. Shen, S. Sandilya, Seok Kim, M. J. Kim, S. Korpar, S. Eidelman, M. Starič, Z. Doležal, C.-L. Hsu, T. Kumita, Y. Yusa, H. Farhat, T. Matsuda, J. B. Kim, V. Babu, D. M. Asner, Peter Kodys, C. B. Van Hulse, V.E. Shebalin, C. Z. Yuan, T. Aushev, W. W. Jacobs, P. Katrenko, Yukinori Sato, S. Al Said, Z. P. Zhang, S. Okuno, T. Nanut, H. Hayashii, Hyunyong Kim, J. G. Shiu, G. Bonvicini, S. Di Carlo, Phillip Urquijo, H. Park, T. Ferber, A. Bozek, G. Karyan, Y. B. Li, M. Watanabe, J. Haba, M. Gelb, Felix Metzner, R. Mizuk, P. Krokovny, S. Nishida, V.N. Zhilich, N. Dash, L. Li Gioi, T.-A. Shibata, K. H. Kang, K. Cho, E. Nakano, E. Solovieva, Y. Yamashita, A. Kuzmin, H. Yamamoto, A. Rostomyan, K. T. Kim, K. Senyo, Ihn Sik Seong, V. Chekelian, K. K. Joo, R. Gillard, S. Ogawa, T. Mori, H. Aihara, M. Heck, I. Adachi, S. Uno, T. Kawasaki, M. E. Sevior, B. K. Pal, C. Schwanda, E. Waheed, V. Vorobyev, T. Schlüter, Dipanwita Dutta, H. Ye, Victoria Zhukova, I. Jaegle, D. Joffe, C. H. Li, K. Miyabayashi, A. Chen, I. Badhrees, A. Vossen, K. Inami, Z. Drásal, Frank Simon, U. Tamponi, T. Uglov, B. Golob, N. K. Nisar, H. K. Moon, D. Kotchetkov, J. S. Lange, O. Grzymkowska, C. H. Wang, M. Ziegler, T. Keck, M. Nayak, S. Paul, A. B. Kaliyar, C. W. Park, E. Won, Ya-Qiu Jin, Y. Onuki, E. L. Barberio, Y. Ushiroda, B. Shwartz, L. Pesántez, J. Grygier, H. Miyata, Bo Wang, K. Hayasaka, A. Bobrov, L. E. Piilonen, G. Pakhlova, R. Kulasiri, T. Julius, R. Chistov, D. Matvienko, Hirokazu Miyake, F. Tenchini, T. Sumiyoshi, C. Pulvermacher, Martin Ritter, T. Sanuki, A. M. Bakich, N. Gabyshev, D. Červenkov, J. F. Strube, C. Kiesling, and M. Bračko
Subjects: Physics, Semileptonic decay, Particle physics, KEKB, Meson, 010308 nuclear & particles physics, 0103 physical sciences, 010306 general physics, 01 natural sciences
Abstract: We present the results of a search for the rare decays $B\ensuremath{\rightarrow}h\ensuremath{\nu}\overline{\ensuremath{\nu}}$, where $h$ stands for ${K}^{+},{K}_{\mathrm{S}}^{0},\phantom{\rule{0ex}{0ex}}{{K}^{*}}^{+},{{K}^{*}}^{0},{\ensuremath{\pi}}^{+},{\ensuremath{\pi}}^{0},{\ensuremath{\rho}}^{+}$ and ${\ensuremath{\rho}}^{0}$. The results are obtained with $772\ifmmode\times\else\texttimes\fi{}{10}^{6}\text{ }\text{ }B\overline{B}$ pairs collected with the Belle detector at the KEKB ${e}^{+}{e}^{\ensuremath{-}}$ collider. We reconstruct one $B$ meson in a semileptonic decay and require a single $h$ meson but nothing else on the signal side. We observe no significant signal and set upper limits on the branching fractions. The limits set on the ${B}^{0}\ensuremath{\rightarrow}{K}_{\mathrm{S}}^{0}\ensuremath{\nu}\overline{\ensuremath{\nu}}$, ${B}^{0}\ensuremath{\rightarrow}{{K}^{*}}^{0}\ensuremath{\nu}\overline{\ensuremath{\nu}}$, ${B}^{+}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}\ensuremath{\nu}\overline{\ensuremath{\nu}}$, ${B}^{0}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{0}\ensuremath{\nu}\overline{\ensuremath{\nu}}$, ${B}^{+}\ensuremath{\rightarrow}{\ensuremath{\rho}}^{+}\ensuremath{\nu}\overline{\ensuremath{\nu}}$, and ${B}^{0}\ensuremath{\rightarrow}{\ensuremath{\rho}}^{0}\ensuremath{\nu}\overline{\ensuremath{\nu}}$ channels are the world's most stringent.
Published: 2017
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25. Evidence for Isospin Violation and Measurement of CP Asymmetries in B→K*(892)γ

Author: D. Liventsev, Vladimir Zhulanov, Y. Jin, M. E. Sevior, P. Goldenzweig, B. G. Cheon, Tsuyoshi Horiguchi, L. E. Piilonen, K. Tanida, J. Haba, K. T. Kim, Y. Choi, K. J. Nath, R. Gillard, C. Pulvermacher, T. E. Browder, R. Itoh, T. Matsuda, S. Uno, M. T. Hedges, J. Libby, Takeo Higuchi, M. Lubej, K. Hayasaka, C. H. Li, G. Bonvicini, Elisa Guido, Y. Yamashita, Z. Drásal, S. Eidelman, A. Vinokurova, S. Korpar, G. Schnell, T. Iijima, D. Kotchetkov, Y. Sakai, V. Gaur, H. Ye, Y. Watanabe, S. H. Kim, P. Krokovny, Rakesh Kumar, Y. Iwasaki, Jyoti Prakash Biswal, T. Julius, W. S. Hou, R. Mussa, K. H. Kang, K. Cho, T. Kuhr, H. B. Jeon, Y. Seino, K. Prasanth, Y. J. Kwon, H. Park, A. Bozek, A. Ishikawa, M. Z. Wang, D. Epifanov, K. Kinoshita, T. A. Shibata, A. Zupanc, O. Schneider, H. Miyata, M. Nakao, T. Czank, Peter Kodys, Prafulla Kumar Behera, P. Križan, W. W. Jacobs, T. K. Pedlar, V. Vorobyev, T. Weber, Soumen Paul, V.N. Zhilich, Eberhard Widmann, B. Pal, Victoria Zhukova, A. Bobrov, S. Al Said, A. Chen, D. Matvienko, Saraju P. Mohanty, J. G. Shiu, K. Miyabayashi, I. Badhrees, M. Uchida, Liangbin Li, A. Rostomyan, Phillip Urquijo, V. Chekelian, S. Di Carlo, R. Pestotnik, V. Bhardwaj, B. Bhuyan, G. S. Varner, J. Rauch, T. Luo, V. M. Aulchenko, S. Watanuki, V. Savinov, F. Tenchini, A. M. Bakich, A. Vossen, Yu. V. Usov, R. Kulasiri, B. G. Fulsom, K. Sumisawa, T. Sumiyoshi, U. Tamponi, Frank Simon, A. J. Schwartz, N. Gabyshev, D. Červenkov, D. Cinabro, T. Hara, M. Masuda, T. Mori, H. Aihara, G. Inguglia, Ihn Sik Seong, S. Jia, T. Kawasaki, S. Hirose, N. Dash, J. F. Strube, C. H. Wang, H. Farhat, H. Hayashii, Luka Santelj, S. Pardi, S. Okuno, K. Inami, G. B. Mohanty, N. K. Nisar, D. Joffe, Y. Guan, Z. P. Zhang, Y. Ushiroda, M. Bračko, L. Li Gioi, K. K. Joo, E. Won, M. Takizawa, V. Babu, T. Aushev, G. Pakhlova, Z. Doležal, Hitoshi Yamamoto, T. Ferber, I. Adachi, I. Jaegle, B. Golob, M. Merola, H. K. Moon, A. Garmash, J. S. Lange, C. S. Park, M. Nayak, K. Senyo, Vikas Bansal, J. B. Kim, E. Nakano, C. Van Hulse, P. Pakhlov, Dipanwita Dutta, K. Trabelsi, C. P. Shen, Yongsun Kim, C. Schwanda, V.E. Shebalin, D. M. Asner, P. L. Wang, Andrey Sokolov, James E. Fast, R. Mizuk, K. Chilikin, S. Nishida, Yoshinobu Unno, Z. Natkaniec, T. Uglov, S. Sandilya, M. J. Kim, M. Starič, M. Gelb, T. Kumita, E. Solovieva, H. Ono, T. Nanut, A. Kuzmin, S. Ogawa, R. Ayad, and D. Y. Kim
Subjects: Physics, Particle physics, Meson, 010308 nuclear & particles physics, Electron–positron annihilation, General Physics and Astronomy, Sigma, 01 natural sciences, Nuclear physics, KEKB, Isospin, 0103 physical sciences, CP violation, B meson, 010306 general physics
Abstract: We report the first evidence for isospin violation in B -> K*gamma and the first measurement of the difference of CP asymmetries between B+->.K*(+)gamma and B-0 -> K-*0 gamma. This analysis is based on the data sample containing 772 x 10(6)BB pairs that was collected with the Belle detector at the KEKB energy-asymmetric e(+)e(-) collider. We find evidence for the isospin violation with a significance of 3.1 sigma, Delta(0+) = [+6.2 +/- 1.5(stat) +/- 0.6(syst) +/- 1.2(f (+-)/f(00))] %, where the third uncertainty is due to the uncertainty on the fraction of B+B- to (BB0)-B-0 production in gamma(4S) decays. The measured value is consistent with predictions of the standard model. The result for the difference of CP asymmetries is Delta A(CP) = [+2.4 +/- 2.8(stat) +/- 0.5(syst)] %, consistent with zero. The measured branching fractions and CP asymmetries for charged and neutral B meson decays are the most precise to date. We also calculate the ratio of branching fractions of B-0 -> K-*0 gamma to B-s(0) -> phi gamma.
Published: 2017
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26. Search for CP Violation and Measurement of the Branching Fraction in the Decay D0→KS0KS0

Author: S. Al Said, K. Sumisawa, Andrey Sokolov, Saraju P. Mohanty, M. Masuda, M. T. Hedges, Yongsun Kim, C. Schwanda, Luka Santelj, Liangbin Li, S. Eidelman, V. Chekelian, M. C. Chang, T. A. Shibata, D. Epifanov, H. Park, A. Bozek, H. Miyata, M. Uchida, B. Bhuyan, Yuki Sato, V. Savinov, R. Mizuk, Victoria Zhukova, V. Bhardwaj, N. K. Nisar, L. E. Piilonen, P. Katrenko, A. Zupanc, A. J. Schwartz, James E. Fast, A. Bobrov, H. Ono, K. M. Williams, K. Inami, Yang Li, Y. Choi, K. J. Nath, A. Chen, T. K. Pedlar, V. Babu, G. Schnell, T. Iijima, E. Won, G. S. Varner, T. Luo, A. Rostomyan, Yu. V. Usov, Z. P. Zhang, Y. Iwasaki, T. Julius, J. G. Shiu, T. Kuhr, K. Chilikin, M. Merola, B. Pal, C. Kiesling, M. Niiyama, L. Pesántez, T. Aushev, Y. Yook, Y. Sakai, Y. J. Kwon, T. Ferber, M. Z. Wang, K. Kinoshita, B. G. Fulsom, S. Uno, V.E. Shebalin, D. M. Asner, G. Pakhlova, Y. Unno, Peter Kodys, W. W. Jacobs, J. Stypula, L. Li Gioi, A. Garmash, C. S. Park, G. Bonvicini, F. Tenchini, G. B. Mohanty, O. Schneider, R. Ayad, Seema Bahinipati, S. Di Carlo, Y. Yusa, K. Senyo, T. Sumiyoshi, M. Bračko, C. Z. Yuan, V.N. Zhilich, G. Karyan, Phillip Urquijo, Jyoti Prakash Biswal, R. Pestotnik, Vikas Bansal, D. Joffe, A. B. Kaliyar, H. K. Moon, Martin Ritter, J. S. Lange, P. L. Wang, S. H. Kim, P. Krokovny, E. Nakano, T. Sanuki, Rakesh Kumar, V. Gaur, D. Y. Kim, Z. Drásal, K. Cho, Soumen Paul, W. S. Hou, J. F. Strube, K. Trabelsi, J. Kahn, I. Jaegle, K. Miyabayashi, I. Badhrees, C. P. Shen, C. Van Hulse, R. Mussa, A. M. Bakich, H. Hayashii, H. B. Jeon, I. Adachi, V. Vorobyev, K. K. Joo, A. Ishikawa, M. Nakao, F. Breibeck, S. Sandilya, P. Križan, Dipanwita Dutta, J. B. Kim, H. J. Kim, T. Kawasaki, M. J. Kim, H. Farhat, B. G. Cheon, N. Gabyshev, D. Červenkov, M. Starič, T. Kumita, R. Itoh, Eberhard Widmann, A. Bondar, S. Korpar, D. Matvienko, D. Kotchetkov, T. Hara, T. Mori, H. Aihara, V. M. Aulchenko, E. L. Barberio, R. Kulasiri, M. Takizawa, Y. Watanabe, B. Shwartz, John Yelton, Z. Doležal, K. T. Kim, R. Gillard, J. Libby, K. Hayasaka, C. H. Li, Y. Seino, D. Cinabro, M. Lubej, S. Pardi, S. Okuno, M. Watanabe, T. E. Browder, U. Tamponi, C. H. Wang, Y. Yamashita, H. Ye, K. Prasanth, H. Sahoo, Tara Nanut, T. Uglov, A. Kuzmin, S. Ogawa, E. Waheed, S. Nishida, N. Dash, Z. Natkaniec, K. Tanida, M. Nayak, P. Pakhlov, J. Haba, D. Liventsev, Vladimir Zhulanov, Y. Jin, M. E. Sevior, I. S. Lee, P. Goldenzweig, E. Solovieva, A. Vossen, and Frank Simon
Subjects: Physics, 010308 nuclear & particles physics, Branching fraction, media_common.quotation_subject, Electron–positron annihilation, Analytical chemistry, General Physics and Astronomy, 01 natural sciences, Asymmetry, law.invention, Standard Model, KEKB, law, 0103 physical sciences, CP violation, 010306 general physics, Collider, media_common
Abstract: We report a study of the decay D-0 -> (KSKS0)-K-0 using 921 fb(-1) of data collected at or near the (sic)(4S) and (sic)(5S) resonances with the Belle detector at the KEKB asymmetric energy e(+)e(-) collider. The measured time-integrated CP asymmetry is A(CP)(D-0 -> (KSKS0)-K-0) = (-0.02 +/- 1.53 +/- 0.02 +/- 0.17)%, and the branching fraction is B(D-0 -> (KSKS0)-K-0) = (1.321 +/- 0.023 +/- 0.036 +/- 0.044) x 10(-4), where the first uncertainty is statistical, the second is systematic, and the third is due to the normalization mode (D-0 -> K-S(0)pi(0)). These results are significantly more precise than previous measurements available for this mode. The A(CP) measurement is consistent with the standard model expectation.
Published: 2017
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27. Study of η and dipion transitions in ϒ(4S) decays to lower bottomonia

Author: T. Aushev, A. M. Bakich, D. Cinabro, Z. Natkaniec, K. T. Kim, R. Gillard, E. Widmann, S. K. Choi, G. Inguglia, V. Zhukova, N. Gabyshev, D. Červenkov, D. Epifanov, X. L. Wang, T. Ferber, K. Chilikin, T. K. Pedlar, K. Tanida, T. Matsuda, V.N. Zhilich, S. Uno, A. Vinokurova, S. H. Kim, P. Krokovny, K. H. Kang, K. Cho, B. Bhuyan, S. Pardi, M. T. Hedges, S. Watanuki, K. Inami, M. Uchida, V.E. Shebalin, K. K. Joo, T. E. Browder, Elisa Guido, A.E. Bondar, A. Garmash, E. Won, D. Matvienko, R. Mussa, V. Bhardwaj, E. Solovieva, M. Takizawa, H. B. Jeon, C. S. Park, K. Miyabayashi, I. Badhrees, A. Bobrov, V. Savinov, A. Ishikawa, Z. Doležal, D. M. Asner, K. Kinoshita, U. Tamponi, M. Nakao, V. Gaur, G. S. Varner, M. Watanabe, T. Luo, Vikas Bansal, G. Schnell, T. Iijima, S. Sandilya, P. Križan, Soumen Paul, J. Libby, P. Pakhlov, M. Lubej, K. Hayasaka, C. H. Li, B.A. Shwartz, E. Nakano, M. J. Kim, T. Nanut, W. S. Hou, R. Pestotnik, Y. Yamashita, Philip Lewis, P. Wang, M. Starič, M. Gelb, C. Van Hulse, Andrey Sokolov, Z. Drásal, M. Bračko, D. Liventsev, D. Kotchetkov, H. Ye, Y. Seino, B. G. Fulsom, H. Park, A. Bozek, T. A. Shibata, Vladimir Zhulanov, Y. Jin, T. Kumita, V. Vorobyev, M. E. Sevior, H. Farhat, B. Pal, H. Miyata, Prafulla Kumar Behera, S. Al Said, P. Goldenzweig, G. Pakhlova, James E. Fast, C. Z. Yuan, K. Trabelsi, C. P. Shen, A. Kuzmin, S. Ogawa, J. F. Strube, H. Hayashii, Liangbin Li, S. Nishida, S.I. Eidelman, S. Jia, D. Joffe, A. Rostomyan, V. Chekelian, A. Vossen, T. Kawasaki, Y. Iwasaki, Y. J. Kwon, C. H. Wang, H. K. Moon, J. S. Lange, Frank Simon, R. Itoh, J. Haba, Y. Choi, K. J. Nath, L. Santelj, M. Nayak, O. Schneider, Y. Sakai, L. Li Gioi, T. Uglov, Yongsun Kim, Byung Gu Cheon, I. Jaegle, K. M. Williams, M. Merola, A. Chen, C. Schwanda, K. Senyo, S. Korpar, A. Zupanc, J. G. Shiu, M. Niiyama, F. Tenchini, T. Sumiyoshi, C. Pulvermacher, Martin Ritter, T. Sanuki, L. E. Piilonen, Y. Watanabe, N. Dash, T. Julius, V.M. Aulchenko, R. Kulasiri, Jyoti Prakash Biswal, Peter Kodys, W. W. Jacobs, S. Di Carlo, G. Karyan, Yoshinobu Unno, K. Sumisawa, M. Masuda, T. Hara, T. Mori, H. Aihara, Y. Usov, N. K. Nisar, Z. P. Zhang, I. Adachi, J. B. Kim, R. Ayad, D. Y. Kim, H. Ono, and R. Mizuk
Subjects: Physics, KEKB, Meson, 010308 nuclear & particles physics, Electron–positron annihilation, 0103 physical sciences, Hadron, Pi, Analytical chemistry, Resonance, 010306 general physics, 01 natural sciences
Abstract: We study hadronic transitions between bottomonium states using 496 fb(-1) data collected at the gamma(4S) resonance with the Belle detector at the KEKB asymmetric energy e(+)e(-) collider. We measure: B(gamma(4S) -> pi(+)pi(-)gamma(1S)) = (8.2 +/- 0.5(stat.)+/- 0.4(syst.)) x 10(-5), B(gamma(4S) -> pi(+)pi(-)gamma(2S)) = (7.9 +/- 1.0(stat.)+/- 0.4(syst.)) x 10(-5), and B(gamma(4S) -> eta gamma(1S)) = (1.70 +/- 0.23(stat.) +/- 0.08(syst.)) x 10(-4). We measure the ratio of branching fractions R=B(gamma(4S) -> eta gamma(1S))/B(gamma(4S) -> pi(+)pi(-)gamma(1S)) = 2.07 +/- 0.30(stat.)+/- 0.11(syst.). We search for the decay gamma(1(3)D(1,2)) -> eta gamma(1S), but do not find significant evidence for such a transition. We also measure the initial state radiation production cross sections of the gamma(2S,3S) resonances and we find values compatible with the expected ones. Finally, the analysis of the gamma(4S) -> pi(+)pi(-)gamma(1S) events shows indications for a resonant contribution due to the f(0)(980) meson.
Published: 2017
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28. Search for Λc+→ϕpπ0 and branching fraction measurement of Λc+→K−π+pπ0

Author: K. Chilikin, K. Inami, M. Z. Wang, K. Kinoshita, U. Tamponi, J. F. Strube, H. Hayashii, T. A. Shibata, H. Miyata, Elisa Guido, Prafulla Kumar Behera, S.I. Eidelman, G. Schnell, Jyoti Prakash Biswal, T. Kuhr, V.N. Zhilich, B. G. Cheon, M. Niiyama, I. Adachi, K. T. Kim, K. Miyabayashi, I. Badhrees, M. Bračko, R. Itoh, T. Aushev, J. B. Kim, S. K. Choi, S. Korpar, P. Pakhlov, T. Ferber, S. Ogawa, Gagan Bihari Mohanty, A. J. Schwartz, Andrey Sokolov, J. G. Shiu, S. Nishida, H. Ono, R. Mizuk, D. Matvienko, A. M. Bakich, A. Zupanc, A. Bozek, M. Takizawa, R. Mussa, H. B. Jeon, E. Widmann, M. Uchida, A. Ishikawa, D. M. Asner, M. Nayak, S. Uno, M. Nakao, N. Gabyshev, D. Červenkov, John Yelton, V. Bhardwaj, Z. Doležal, R. Kulasiri, T. Nanut, M. Sumihama, Vikas Bansal, K. Tanida, E. Nakano, A. Vinokurova, A. Chen, G. S. Varner, T. Luo, Y. Yamashita, Liangbin Li, A. Rostomyan, Y. J. Kwon, C. Van Hulse, Z. Drásal, B. Pal, V. Chekelian, Massimo Berger, S. H. Kim, P. Krokovny, H. Ye, B. G. Fulsom, O. Schneider, Peter Kodys, T. Uglov, W. W. Jacobs, C. Z. Yuan, R. Ayad, Soumen Paul, K. Cho, T. E. Browder, A. Bobrov, S. Di Carlo, D. Liventsev, Y. Watanabe, S. Sandilya, D. Cinabro, V. Savinov, Vladimir Zhulanov, Y. Jin, M. E. Sevior, G. Karyan, I. Jaegle, D. Y. Kim, P. Goldenzweig, M. Starič, M. Merola, M. Watanabe, K. Senyo, R. Pestotnik, S. Jia, V. Zhukova, C. H. Wang, T. K. Pedlar, V. Gaur, D. Joffe, Y. Kato, Yang Li, Y. Choi, K. J. Nath, L. Santelj, Y. Sakai, S. Pardi, S. Al Said, Yongsun Kim, C. Schwanda, J. Libby, M. Lubej, K. Hayasaka, C. H. Li, C. L. Hsu, Y. Seino, Shoichi Watanuki, K. K. Joo, E. Won, H. K. Moon, W. S. Hou, V. Vorobyev, J. MacNaughton, L. E. Piilonen, Z. P. Zhang, Kevin Varvell, T. Hara, T. Mori, H. Aihara, F. Tenchini, T. Sumiyoshi, Martin Ritter, T. Sanuki, X. L. Wang, E. Solovieva, Frank Simon, N. Dash, G. Pakhlova, D. Kotchetkov, L. Li Gioi, A. Garmash, and C. S. Park
Subjects: Physics, Particle physics, 010308 nuclear & particles physics, Branching fraction, Electron–positron annihilation, Analytical chemistry, Lambda, 01 natural sciences, Belle experiment, Luminosity, Charmed baryons, KEKB, 0103 physical sciences, Pi, 010306 general physics
Abstract: We have searched for the Cabibbo-suppressed decay Lambda(+)(c) -> pi p(0) in e(+) e(-) collisions using a data sample corresponding to an integrated luminosity of 915 fb(-1). The data were collected by the Belle experiment at the KEKB e(+) e(-) asymmetric-energy collider running at or near the (4S) and (5S) resonances. No significant signal is observed, and we set an upper limit on the branching fraction of B(Lambda(+)(c) -> phi p(0)) K+ K- p pi(0) decays is found to be consistent with zero, and the corresponding upper limit on its branching fraction is set to be B(Lambda(+)(c) ->. K+ K- p pi(0))(NR) phi p. We see no evidence for this intermediate decay and set an upper limit on the product branching fraction of B(Lambda(+)(c) -> P-s(+) pi(0)) x B(P-s(+) -> phi p) K- pi(+) p pi(0);the result is B(Lambda(+)(c) -> K- pi(+) p pi(0)) = (4.42 +/- 0.05(stat)+/- 0.12(syst)+/- 0.16(norm))%, which is the most precise measurement to date.
Published: 2017
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29. Invariant-mass and fractional-energy dependence of inclusive production of dihadrons in e+e− annihilation at s=10.58 GeV

Author: Z. Drásal, G. Schnell, T. Iijima, P. Pakhlov, Eberhard Widmann, H. Park, G. Pakhlova, S. Nishida, Y. Yamashita, A. Bozek, L. Li Gioi, D. Joffe, T. Aushev, H. Ye, H. Farhat, A. Garmash, T. Ferber, K. Tanida, Liangbin Li, N. Dash, A. Zupanc, Y. Choi, V. Chekelian, K. J. Nath, W. S. Hou, K. T. Kim, D. Kotchetkov, B. Pal, L. Santelj, Eleonora Guido, R. Gillard, M. Uchida, K. Sumisawa, Y. Sakai, A. Chen, B. Bhuyan, S. K. Choi, V. Vorobyev, V. Bhardwaj, M. Masuda, J. G. Shiu, A. M. Bakich, T. E. Browder, Jyoti Prakash Biswal, C. P. Shen, Z. Natkaniec, D. Matvienko, M. J. Kim, M. Starič, A. Bobrov, G. S. Varner, Soumen Paul, T. Luo, V. Savinov, R. Kulasiri, T. A. Shibata, H. Miyata, A. Rostomyan, P. Wang, A. Vossen, Prafulla Kumar Behera, D. Cinabro, E. Won, N. Gabyshev, D. Červenkov, R. Pestotnik, S.I. Eidelman, T. K. Pedlar, Frank Simon, B. G. Fulsom, V.E. Shebalin, H. Hayashii, K. K. Joo, M. Watanabe, J. F. Strube, M. Lubej, V. Zhukova, M. Niiyama, B. G. Cheon, F. Tenchini, Peter Kodys, D. M. Asner, T. Matsuda, S. Uno, T. Sumiyoshi, V. Gaur, T. Kumita, R. Itoh, W. W. Jacobs, S. Jia, M. Takizawa, V.N. Zhilich, Y. Watanabe, S. Korpar, K. Chilikin, C. Pulvermacher, Z. Doležal, S. H. Kim, P. Krokovny, C. H. Wang, E. Solovieva, S. Al Said, H. K. Moon, K. H. Kang, K. Cho, J. S. Lange, M. Merola, I. Jaegle, K. Miyabayashi, K. Inami, Y. Iwasaki, Yongsun Kim, C. Schwanda, T. Mori, H. Aihara, Martin Ritter, S. Di Carlo, Y. J. Kwon, I. Badhrees, G. Karyan, N. K. Nisar, M. Bračko, O. Schneider, Z. P. Zhang, K. Kinoshita, U. Tamponi, K. Senyo, Vikas Bansal, L. E. Piilonen, E. Nakano, J. Haba, S. Pardi, C. Van Hulse, B.A. Shwartz, D. Liventsev, Vladimir Zhulanov, Y. Jin, J. Libby, K. Hayasaka, T. Julius, M. E. Sevior, P. Goldenzweig, Y. Seino, Shoichi Watanuki, R. Seidl, I. Adachi, J. B. Kim, H. Ono, R. Mizuk, Y. Unno, R. Ayad, D. Y. Kim, R. Mussa, H. B. Jeon, A. Ishikawa, M. Nakao, A. Kuzmin, P. Križan, S. Ogawa, Andrey Sokolov, James E. Fast, Tara Nanut, and T. Uglov
Subjects: Physics, Particle physics, Annihilation, 010308 nuclear & particles physics, Electron–positron annihilation, High Energy Physics::Phenomenology, Nuclear Theory, Hadron, Parton, 01 natural sciences, Nuclear physics, Pion, KEKB, 0103 physical sciences, High Energy Physics::Experiment, Invariant mass, Nuclear Experiment, 010306 general physics, Nucleon
Abstract: The inclusive cross sections for dihadrons of charged pions and kaons (e(+)e(-) -> hhX) in electron-positron annihilation are reported. They are obtained as a function of the total fractional energy and invariant mass for any di-hadron combination in the same hemisphere as defined by the thrust event-shape variable and its axis. Since same-hemisphere dihadrons can be assumed to originate predominantly from the same initial parton, di-hadron fragmentation functions are probed. These di-hadron fragmentation functions are needed as an unpolarized baseline in order to quantitatively understand related spindependent measurements in other processes and to apply them to the extraction of quark transversity distribution functions in the nucleon. The di- hadron cross sections are obtained from a 655 fb(-1) data sample collected at or near the Y (4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider.
Published: 2017
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30. Measurement of the branching fraction and CP asymmetry in B0→π0π0 decays, and an improved constraint on ϕ2

Author: H. Farhat, Vikas Bansal, E. Nakano, G. B. Mohanty, D. Liventsev, C. Van Hulse, A. Zupanc, Vladimir Zhulanov, Y. Jin, M. E. Sevior, I. S. Lee, Y. Yusa, M. Barrett, B. Bhuyan, B. Pal, Massimo Berger, Dipanwita Dutta, Yuki Sato, C. Z. Yuan, M. Nayak, P. Goldenzweig, D. Joffe, T. E. Browder, F. Tenchini, K. Tanida, A. Bobrov, B. G. Cheon, T. Sumiyoshi, M. Z. Wang, K. Kinoshita, U. Tamponi, A. Kuzmin, M. Merola, C. Pulvermacher, Martin Ritter, S. Sandilya, Yang Li, S. Nishida, A.E. Bondar, Y. Choi, K. J. Nath, S. Pardi, I. Adachi, V. Savinov, G. Schnell, T. Iijima, M. J. Kim, L. Santelj, S. Ogawa, M. Starič, K. Senyo, D. Dossett, T. Matsuda, S. Uno, T. Sanuki, K. M. Williams, Y. Sakai, A. Chen, C. H. Wang, R. Itoh, J. B. Kim, T. Kuhr, G. Bonvicini, L. E. Piilonen, Peter Kodys, W. W. Jacobs, E. Waheed, Z. Doležal, P. Katrenko, Y. Yamashita, Youngjoon Kwon, K. Chilikin, A. J. Schwartz, R. Mussa, K. T. Kim, R. Gillard, E. Won, T. Kawasaki, S. H. Kim, P. Krokovny, H. Ye, K. Inami, S. Korpar, P. Pakhlov, A. Ishikawa, K. Cho, L. Pesántez, M. Nakao, Y. Iwasaki, K. Trabelsi, J. Kahn, S. Di Carlo, P. Križan, J. Haba, S. Uehara, R. Ayad, H. Hayashii, H. Sahoo, V.N. Zhilich, M. Uchida, T. Julius, K. K. Joo, O. Schneider, Tara Nanut, J. F. Krohn, J. G. Shiu, T. Uglov, T. Bloomfield, Andrey Sokolov, V. Bhardwaj, G. Karyan, D. Y. Kim, V. Babu, Phillip Urquijo, V.E. Shebalin, M. Watanabe, I. Jaegle, K. Miyabayashi, T. Aushev, I. Badhrees, R. Kulasiri, H. Park, A. Bozek, T. Ferber, R. Pestotnik, G. S. Varner, H. Ono, R. Mizuk, Z. Drásal, T. Luo, T. A. Shibata, H. Miyata, V. Gaur, S.I. Eidelman, James E. Fast, P. Wang, W. S. Hou, B. G. Fulsom, Liangbin Li, D. M. Asner, D. Cinabro, Y. Unno, V. Chekelian, M. Masuda, H. K. Moon, J. S. Lange, S. Al Said, Y. Watanabe, J. Libby, Y. Chao, K. Hayasaka, C. H. Li, Yongsun Kim, C. L. Hsu, C. Schwanda, Y. Seino, V.M. Aulchenko, E. L. Barberio, A. Garmash, C. S. Park, G. Pakhlova, L. Li Gioi, N. Dash, D. Kotchetkov, M. C. Chang, M. Salehi, A. Vossen, Kevin Varvell, T. Hara, E. Solovieva, T. Mori, H. Aihara, Y. Usov, N. K. Nisar, Z. P. Zhang, Jyoti Prakash Biswal, J. MacNaughton, H. J. Kim, C. Kiesling, M. Bračko, Eberhard Widmann, A. M. Bakich, Z. Natkaniec, N. Gabyshev, D. Červenkov, and B.A. Shwartz
Subjects: Physics, Particle physics, 010308 nuclear & particles physics, Branching fraction, Electron–positron annihilation, media_common.quotation_subject, Resonance, 01 natural sciences, Asymmetry, KEKB, 0103 physical sciences, Pi, CP violation, 010306 general physics, media_common, Bar (unit)
Abstract: We measure the branching fraction and CP violation asymmetry in the decay B-0 -> pi(0)pi(0), using a data sample of 752 x 10(6) B (B) over bar pairs collected at the Y(4S) resonance with the Belle detector at the KEKB e(+)e(-) collider. The obtained branching fraction and direct CP asymmetry are B(B -> pi(0)pi(0)) = [1.31 +/- 0.19(stat) +/- 0.19(syst)] x 10(-6) and A(CP) = +0.14 +/- 0.36(stat) +/- 0.10(syst), respectively. The signal significance, including the systematic uncertainty, is 6.4 standard deviations. We combine these results with Belle's earlier measurements of B-0 -> pi(+)pi(-) and B-+/- -> pi(+/-)pi(0) to exclude the CP-violating parameter phi(2) from the range 15.5 degrees < phi(2) < 75.0 degrees at 95% confidence level.
Published: 2017
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31. Measurement of branching fraction and direct CP asymmetry in charmless B+→K+K−π+ decays at Belle

Author: Kevin Varvell, S. Eidelman, T. Mori, H. Aihara, K. T. Kim, D. Y. Kim, D. Matvienko, Eberhard Widmann, L. Pesántez, Melissa K. Takahashi, O. Schneider, J. Libby, V. Bhardwaj, T. K. Pedlar, Y. Usov, Tao Luo, Jyoti Prakash Biswal, Y. Seino, R. Ayad, Yukinori Sato, I. Adachi, J. G. Shiu, H. Farhat, M. Masuda, G. B. Mohanty, J. B. Kim, H. Ono, T. Aushev, Y. Watanabe, B. Shwartz, V. Gaur, F. Tenchini, V.E. Shebalin, Phillip Urquijo, S. Okuno, Y. Unno, T. Matsuda, P. Goldenzweig, M. Nakao, Chawon Park, V. V. Zhulanov, H. Park, A. Bozek, D. Joffe, S. Sandilya, A.E. Bondar, K. Chilikin, M. J. Kim, G. Bonvicini, Martin Ritter, T. Sanuki, G. Schnell, M. Takizawa, C. B. Van Hulse, M. Starič, Y. Onuki, R. Mussa, H. B. Jeon, K. M. Williams, A. Ishikawa, D. Cinabro, Y.-T. Lai, Y-J Kwon, B. G. Cheon, M. T. Hedges, M. Lubej, G. Inguglia, B. Bhuyan, T. Bloomfield, Frank Simon, C. Kiesling, B. G. Fulsom, T. E. Browder, P. Krokovny, P. Chang, M. Nayak, M. E. Sevior, C.-L. Hsu, K. H. Kang, K. Cho, Z. Natkaniec, Y. Sakai, H. Hayashii, Hyunyong Kim, Ya-Qiu Jin, K. K. Joo, T. Kuhr, V. M. Aulchenko, M. Bračko, Z. P. Zhang, Peter Kodys, W. W. Jacobs, B. Golob, S. Al Said, P. Katrenko, V. Savinov, H. Miyata, K. Hayasaka, A. Zupanc, E. L. Barberio, S. Ogawa, T.-A. Shibata, Zdenek Dolezal, V.N. Zhilich, S. Korpar, N. K. Nisar, N. Dash, O. Grzymkowska, C. H. Wang, J. Haba, Z. Drásal, A. M. Bakich, A. Garmash, L. E. Piilonen, G. Pakhlova, R. Kulasiri, I. Jaegle, S. Paul, K. Miyabayashi, I. Badhrees, J. S. Lange, K. Senyo, S. Di Carlo, S. Nishida, E. Solovieva, Massimo Berger, L. Li Gioi, Y. Yamashita, N. Gabyshev, E. Waheed, T. Julius, E. Nakano, T. Kawasaki, K. Inami, Seok Kim, R. Mizuk, A. B. Kaliyar, R. Chistov, M. Z. Wang, D. Kotchetkov, P. K. Behera, H. Ye, F. Strube, Y. Choi, K. J. Nath, X. L. Wang, T. Hara, V. Chekelian, S. Uno, C. Schwanda, M. Uchida, L. K. Li, C. W. Park, E. Won, B. K. Pal, Eleonora Guido, C. H. Li, Victoria Zhukova, D. Liventsev, A. Chen, K. Sumisawa, D. M. Asner, J. E. Fast, D. Dossett, H. Atmacan, G. S. Varner, M. Watanabe, P. Krizan, Tara Nanut, T. Uglov, A. Rostomyan, W. S. Hou, Alexei Kuzmin, and V. Vorobyev
Subjects: Physics, Particle physics, 010308 nuclear & particles physics, Branching fraction, media_common.quotation_subject, Electron–positron annihilation, Resonance, 01 natural sciences, Asymmetry, Nuclear physics, KEKB, 0103 physical sciences, CP violation, Invariant mass, B meson, 010306 general physics, media_common
Abstract: We report a study of the charmless hadronic decay of the charged B meson to the three-body final state K+K-pi(+). The results are based on a data sample that contains 772 x 10(6) B (B) over bar pairs collected at the Y (4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The measured inclusive branching fraction and direct CP asymmetry are (5.38 +/- 0.40 +/- 0.35) x 10(-6) and -0.170 +/- 0.073 +/- 0.017, respectively, where the first uncertainties are statistical and the second are systematic. The K+K- invariant mass distribution of the signal candidates shows an excess in the region below 1.5 GeV/c(2), which is consistent with the previous studies from BABAR and LHCb. In addition, strong evidence of a large direct CP asymmetry is found in the low K+K- invariant-mass region.
Published: 2017
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32. Measurement of the τ Lepton Polarization and R(D) in the Decay B¯→Dτ−ν¯τ

Author: J. G. Shiu, H. Farhat, S. Okuno, Phillip Urquijo, Kevin Varvell, L. E. Piilonen, D. Dutta, T. A. Shibata, H. Miyata, Prafulla Kumar Behera, Y. Choi, Y. Ushiroda, K. K. Joo, E. Won, Liangbin Li, A. Rostomyan, J. Libby, M. Niiyama, L. Pesántez, K. Trabelsi, T. Mori, H. Aihara, D. Greenwald, Vikas Bansal, I. Adachi, M. Lubej, K. Hayasaka, C. H. Li, C. P. Shen, C. L. Hsu, Soumen Paul, Peter Kodys, W. W. Jacobs, T. Julius, J. Grygier, V. Babu, G. Schnell, T. Iijima, M. Takizawa, T. Aushev, Y. Seino, B. G. Cheon, D. Epifanov, C. Van Hulse, T. Ferber, N. K. Nisar, Y. Iwasaki, Y. J. Kwon, John Yelton, R. Itoh, D. M. Asner, S. Eidelman, S. Di Carlo, A. Bondar, Z. Doležal, S. Nishida, T. Kuhr, A. Vossen, O. Schneider, T. Schlüter, O. Seon, Frank Simon, D. Cinabro, A. Zupanc, S. Korpar, D. Kotchetkov, R. Mizuk, V.N. Zhilich, K. Chilikin, Z. P. Zhang, A. Chen, G. Inguglia, Mikhail Danilov, M. Watanabe, H. Park, Jochen Dingfelder, Z. Drásal, T. E. Browder, S. Ogawa, K. Miyabayashi, I. Badhrees, Z. Natkaniec, B. Golob, S. Sandilya, M. J. Kim, R. Ayad, W. Ostrowicz, U. Tamponi, H. K. Moon, A. Bozek, P. Chang, G. Pakhlova, Yoshinobu Unno, B. Pal, Massimo Berger, J. S. Lange, P. L. Wang, M. Starič, F. Tenchini, T. Sumiyoshi, B. Bhuyan, K. Sumisawa, Jyoti Prakash Biswal, Meng Wang, C. Z. Yuan, H. Miyake, D. Y. Kim, I. Jaegle, T. Matsuda, S. Uno, Martin Ritter, K. Adamczyk, V.E. Shebalin, Yuki Sato, C. H. Wang, T. Sanuki, V. Gaur, E. Solovieva, K. T. Kim, Y. Yamashita, R. Chistov, M. Masuda, N. Dash, V. Savinov, D. Joffe, H. Kichimi, S. Al Said, R. Kumar, H. Ye, H. Ono, W. S. Hou, T. Kawasaki, S. Hirose, M. Rozanska, G. Bonvicini, Junho Kim, K. Prasanth, K. Senyo, M. Uchida, Kazuhiko Hara, M. Nayak, Yang Li, R. Pestotnik, K. J. Nath, P. Pakhlov, H. Atmacan, G. S. Varner, T. Luo, C. Schwanda, Y. Sakai, Takeo Higuchi, S. H. Kim, P. Krokovny, Yu. V. Usov, B. G. Fulsom, L. Li Gioi, A. Garmash, K. Cho, Y. Kato, T. Nanut, R. Mussa, A. Ishikawa, M. Nakao, C. W. Park, P. Križan, Andrey Sokolov, James E. Fast, T. Uglov, K. Kinoshita, Luka Santelj, K. Inami, R. Kulasiri, J. F. Strube, H. Hayashii, J. Haba, Y. Onuki, J. Hasenbusch, V. M. Aulchenko, G. B. Mohanty, E. L. Barberio, D. Liventsev, Vladimir Zhulanov, Y. Jin, M. E. Sevior, P. Goldenzweig, Y. Watanabe, A. M. Bakich, J. MacNaughton, N. Gabyshev, D. Červenkov, Eberhard Widmann, D. Matvienko, C. Kiesling, and M. Bračko
Subjects: Physics, Particle physics, Muon, Meson, 010308 nuclear & particles physics, Electron–positron annihilation, High Energy Physics::Phenomenology, General Physics and Astronomy, Elementary particle, Electron, 01 natural sciences, Positron, KEKB, 0103 physical sciences, High Energy Physics::Experiment, 010306 general physics, Lepton
Abstract: We report the first measurement of the tau lepton polarization P-tau(D*) in the decay (B) over bar -> D* tau(-) (v) over bar (tau) as well as a newmeasurement of the ratio of the branching fractions R(D*) = B((B) over bar -> D* tau(-) (v) over bar (tau)) / B((B) over bar -> D* l(-) (v) over bar (l)), where l(-) denotes an electron or a muon, and the tau is reconstructed in the modes tau(-) -> pi(-) v(tau) and tau(-) -> rho(-) v(tau). We use the full data sample of 772 x 10(6) B (B) over bar pairs recorded with the Belle detector at the (KEKB) over bar electron-positron collider. Our results, P-tau(D*) = -0.38 +/- 0.51 (stat)(-0.16)(+0.21) (syst) and R(D*) = 0.270 +/- 0.035 (stat)(- 0.025)(+0.028) (syst), are consistent with the theoretical predictions of the standard model.
Published: 2017
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33. First measurement of T -odd moments in D0→KS0π+π−π0 decays

Author: G. Schnell, S. Ogawa, M. Starič, I. Jaegle, K. Miyabayashi, I. Badhrees, M. Z. Wang, K. Kinoshita, B. Shwartz, T. Kuhr, R. Mizuk, H. Ono, Y. Yusa, A. Garmash, H. Yamamoto, K. Senyo, D. Liventsev, Y. Unno, V. Babu, T. Kawasaki, T.-A. Shibata, A. Rostomyan, V. Chekelian, V. M. Aulchenko, Victoria Zhukova, I. Adachi, T. Aushev, Hua Ye, K. Sumisawa, D. M. Asner, A. Chen, M. Niiyama, L. Pesántez, B. K. Pal, P. Goldenzweig, T. Ferber, M. Salehi, T. Nanut, K. Inami, S. Sandilya, A. Zupanc, M. J. Kim, T. Matsuda, B. Bhuyan, A. M. Bakich, Seema Bahinipati, K. J. Nath, M. Uchida, Z. Drásal, T. Hara, L. Santelj, M. Masuda, B. G. Fulsom, L. K. Li, G. B. Mohanty, T. Kumita, G. Bonvicini, T. E. Browder, Z. P. Zhang, S. Nishida, H. Miyata, R. Ayad, R. Mussa, P. Wang, Massimo Berger, Hiroaki Aihara, A. J. Schwartz, A. Bozek, H. B. Jeon, A. Vinokurova, S. Uehara, D. Kotchetkov, Y. Iwasaki, Y. J. Kwon, P. Krokovny, Z. Natkaniec, A. Bobrov, P. Pakhlov, S. H. Kim, B. G. Cheon, D. Matvienko, C. Z. Yuan, E. Waheed, O. Schneider, K. Chilikin, Y. J. Kim, A. Ishikawa, Peter Kodys, K. H. Kang, K. Cho, W. W. Jacobs, Y. Sakai, E. Barberio, N. K. Nisar, H. K. Moon, K. Trabelsi, K. K. Joo, H. Park, C. P. Shen, A. Kuzmin, J. S. Lange, S. Di Carlo, M. Nayak, G. Karyan, Yukinori Sato, G. Varner, T. Uglov, A. B. Kaliyar, K. Hayasaka, S. Uno, J. G. Shiu, D. Epifanov, Samo Korpar, R. Pestotnik, M. T. Hedges, Ya-Qiu Jin, E. Won, H. Farhat, J. B. Kim, Phillip Urquijo, V. Bhardwaj, P. Križan, W. S. Hou, N. Dash, E. Solovieva, Rahul Kumar, V. Vorobyev, V.E. Shebalin, S. Al Said, Leo Piilonen, D. Joffe, A. Vossen, Frank Simon, C. Schwanda, Jyoti Prakash Biswal, T. Sumiyoshi, V. Gaur, Andrey Sokolov, M. Nakao, Chawon Park, V. V. Zhulanov, Y. Yook, Semen Eidelman, Y. Watanabe, T. Mori, D. Y. Kim, G. Pakhlova, R. Kulasiri, T. Julius, R. Chistov, R. Itoh, R. Sinha, F. Tenchini, C. Pulvermacher, Martin Ritter, T. Sanuki, L. Li Gioi, Y. Yamashita, K. T. Kim, Tao Luo, K. Tanida, D. Cinabro, Dipanwita Dutta, R. Gillard, C. Kiesling, C. H. Li, C. B. Van Hulse, M. Bračko, S. K. Choi, Eberhard Widmann, J. F. Strube, J. Libby, M. Lubej, K. Prasanth, Y. Seino, S. Okuno, N. Gabyshev, M. E. Sevior, I. S. Lee, J. E. Fast, A.E. Bondar, J. Haba, M. Takizawa, D. Červenkov, K. M. Williams, John Yelton, Y. Choi, Z. Doležal, Daniel Greenwald, V. Bansal, M. Watanabe, U. Tamponi, C. H. Wang, S. Paul, and V.N. Zhilich
Subjects: Physics, Particle physics, 010308 nuclear & particles physics, Electron–positron annihilation, media_common.quotation_subject, 01 natural sciences, Asymmetry, Belle experiment, Charm quark, Luminosity, Nuclear physics, KEKB, 0103 physical sciences, Pi, CP violation, 010306 general physics, media_common
Abstract: We report the first measurement of the T-odd moments in the decay D-0 -> K-S(0) pi + pi(-)pi(0) from a data sample corresponding to an integrated luminosity of 966 fb(-1) collected by the Belle experiment at the KEKB asymmetric-energy e(+)e(-) collider. From these moments we determine the CP-violation-sensitive asymmetry a(CP)(T-odd) = [-0.28 +/- 1.38 (stat.)(-0.76)(+0.23) (syst.)] x 10(-3) , which is consistent with no CP violation. In addition, we perform a(CP)(T-odd) measurements in different regions of the D-0 -> K-S(0) pi + pi(-)pi(0) phase space;these are also consistent with no CP violation.
Published: 2017
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34. Lepton-Flavor-Dependent Angular Analysis of B→K*ℓ+ℓ−

Author: G. B. Mohanty, Vikas Bansal, E. Nakano, Y. Yusa, C. Van Hulse, T. Sumiyoshi, D. Joffe, M. Uchida, T. Schlüter, Tariq Aziz, Dipanwita Dutta, Yang Li, K. J. Nath, A. Zupanc, A. Bozek, Soumen Paul, S. E. Vahsen, J. Libby, M. Lubej, C. H. Li, James E. Fast, Luka Santelj, Eberhard Widmann, T. Luo, Y. Yook, C. L. Hsu, Semen Eidelman, B. Pal, R. Mussa, W. Bartel, H. B. Jeon, R. Kulasiri, B. G. Fulsom, A. Ishikawa, L. Pesántez, S. Wehle, B. Bhuyan, Yuki Sato, M. Nakao, L. Koch, Y. Seino, C. W. Park, Hiroaki Aihara, N. Gabyshev, P. Križan, Elisa Guido, Y. Ushiroda, C. Niebuhr, M. T. Hedges, Y. Yamashita, A. Bobrov, R. Chistov, J. Rauch, G. Schnell, C. Z. Yuan, V. Savinov, H. Ye, G. Varner, J. G. Shiu, S. Sandilya, K. Senyo, I. Jaegle, K. Inami, T. A. Shibata, K. Trabelsi, M. J. Kim, D. Liventsev, Prafulla Kumar Behera, C. P. Shen, H. Miyake, T. Kuhr, V. Babu, M. Starič, Z. Drásal, T. Aushev, Ihn Sik Seong, Phillip Urquijo, Peter Kodys, W. W. Jacobs, Liangbin Li, A. Rostomyan, T. Kumita, K. Sumisawa, T. Kawasaki, V. Chekelian, H. Ono, D. Červenkov, T. Ferber, T. Matsuda, J. F. Strube, T. E. Browder, P. Wang, G. Bonvicini, H. Hayashii, G. Karyan, Y. Onuki, D. Cinabro, E. Solovieva, H. Kichimi, S. Al Said, K. T. Kim, G. Inguglia, Meng Wang, Y. Iwasaki, R. Gillard, S. H. Kim, P. Chang, Y. J. Kwon, N. Dash, K. Hayasaka, P. Krokovny, V.M. Aulchenko, C. Pulvermacher, M. Watanabe, K. Kinoshita, U. Tamponi, H. Park, A. Kuzmin, F. Tenchini, T. Tsuboyama, O. Schneider, C. Kiesling, K. H. Kang, K. Cho, M. Masuda, C. H. Wang, R. Sinha, D. Epifanov, Toru Iijima, L. Li Gioi, A.E. Bondar, S. Yashchenko, M. Bračko, C. S. Park, O. Grzymkowska, M. Takizawa, Y. Sakai, T. Julius, Y. Choi, Z. Doležal, D. Kotchetkov, T. Hara, S. Ogawa, R. Mizuk, K. Chilikin, M. Nayak, R. Ayad, R. Itoh, Victoria Zhukova, C. Schwanda, K. M. Williams, A. Chen, Leo Piilonen, J. Haba, A. Vossen, O. Seon, Frank Simon, B.A. Shwartz, D. Y. Kim, Z. P. Zhang, S. Nishida, Vladimir Zhulanov, Y. Jin, M. E. Sevior, Jochen Dingfelder, P. Goldenzweig, Iki Adachi, Martin Ritter, Z. Natkaniec, J. B. Kim, A. M. Bakich, B. G. Cheon, T. Sanuki, D. M. Asner, Samo Korpar, B. Golob, E. Barberio, A. B. Kaliyar, J. S. Lange, M. Ziegler, W. S. Hou, V. Vorobyev, S. Uno, A. Garmash, K. K. Joo, E. Won, Kevin Varvell, T. Nanut, Hitoshi Yamamoto, Y. Watanabe, T. Mori, Y. Usov, N. K. Nisar, G. Pakhlova, V.N. Zhilich, Jyoti Prakash Biswal, K. Miyabayashi, V. Gaur, E. Waheed, H. Farhat, T. Uglov, P. Katrenko, A. J. Schwartz, H. J. Kim, and Yoshinobu Unno
Subjects: Physics, Particle physics, Muon, 010308 nuclear & particles physics, Electron–positron annihilation, General Physics and Astronomy, Sigma, Observable, Elementary particle, 01 natural sciences, Nuclear physics, KEKB, 0103 physical sciences, High Energy Physics::Experiment, 010306 general physics, Flavor, Lepton
Abstract: We present a measurement of angular observables and a test of lepton flavor universality in the B -> K(+)l(+)l(-) decay, where l is either e or mu. The analysis is performed on a data sample corresponding to an integrated luminosity of 711 fb(-1) containing 772 x 10(6) B (B) over bar pairs, collected at the Upsilon(4S) resonance with the Belle detector at the asymmetric-energy e(+)e(-) collider KEKB. The result is consistent with standard model (SM) expectations, where the largest discrepancy from a SM prediction is observed in the muon modes with a local significance of 2.6 sigma.
Published: 2017
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35. Observation of D0→ρ0γ and Search for CP Violation in Radiative Charm Decays

Author: A. Ishikawa, A. Garmash, C. S. Park, M. Nakao, C. W. Park, Marko Petrič, Jyoti Prakash Biswal, A. M. Bakich, A. Bondar, S. Korpar, I. Jaegle, Yang Li, V.N. Zhilich, Y. Choi, K. J. Nath, M. Nayak, J. Rauch, V. Gaur, J. Libby, J. G. Shiu, M. Lubej, K. Hayasaka, C. H. Li, K. T. Kim, K. Miyabayashi, I. Badhrees, K. Trabelsi, K. Senyo, Semen Eidelman, M. Masuda, C. P. Shen, Luka Santelj, C. Pulvermacher, F. Tenchini, S. Sandilya, V. Babu, T. Aushev, N. K. Nisar, T. E. Browder, H. Park, A. Bozek, M. J. Kim, T. Ferber, R. Gillard, B. G. Cheon, Y. Sakai, Y. Seino, S. K. Choi, G. Schnell, T. Iijima, N. Gabyshev, D. Červenkov, T. Sumiyoshi, Victoria Zhukova, Martin Ritter, A. Vossen, O. Seon, R. Ayad, Y. Yamashita, M. Uchida, L. Li Gioi, S. Okuno, A. Chen, V. Bhardwaj, A. Kuzmin, J.E. Fast, T. K. Pedlar, M. Starič, T. Sanuki, S. Ogawa, T. Kuhr, Soumen Paul, R. Kulasiri, D. Liventsev, Vladimir Zhulanov, N. Dash, M. E. Sevior, I. S. Lee, P. Goldenzweig, T. Matsuda, S. Al Said, D. Y. Kim, S. Uno, A. B. Kaliyar, M. Bračko, G. S. Varner, D. Cinabro, K. Prasanth, H. K. Moon, A. Vinokurova, Eberhard Widmann, T. Nanut, Liangbin Li, Peter Kodys, W. W. Jacobs, J. S. Lange, D. Matvienko, G. Inguglia, S. H. Kim, V. M. Aulchenko, U. Tamponi, A. Rostomyan, R. Pestotnik, Y. Ushiroda, K. H. Kang, K. Cho, L. Pesántez, Samo Stanič, S. Di Carlo, A. Zupanc, J. Yamaoka, M. Takizawa, G. B. Mohanty, V. Chekelian, Y. J. Kwon, B. G. Fulsom, E. Solovieva, Y. Watanabe, K. Inami, R. Mizuk, L. E. Piilonen, I. Adachi, O. Schneider, B. Shwartz, C. H. Wang, John Yelton, Z. Doležal, J. B. Kim, B. Pal, C. Schwanda, W. S. Hou, T. Julius, D. Joffe, Hiroaki Aihara, J. Stypula, T. A. Shibata, J. F. Strube, Z. P. Zhang, H. Miyata, Prafulla Kumar Behera, Y. Iwasaki, V. Vorobyev, H. Hayashii, T. Kawasaki, Yuki Sato, P. Krokovny, R. Chistov, K. Kinoshita, V. Savinov, V.E. Shebalin, K. K. Joo, E. Won, Vikas Bansal, D. M. Asner, T. Schlüter, Dipanwita Dutta, P. L. Wang, Meng Wang, P. Pakhlov, H. Farhat, B. Golob, S. Nishida, A. J. Schwartz, and G. Pakhlova
Subjects: Physics, Particle physics, KEKB, 010308 nuclear & particles physics, Branching fraction, 0103 physical sciences, Radiative transfer, General Physics and Astronomy, CP violation, 010306 general physics, 01 natural sciences
Abstract: We report the first observation of the radiative charm decay D-0 -> rho(0)gamma and the first search for CP violation in decays D-0 -> rho(0)gamma, phi gamma, and (K) over bar (*0)(892)gamma, using a data sample of 943 fb(-1) collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The branching fraction is measured to be B(D-0 -> rho(0)gamma) = (1.77 +/- 0.30 +/- 0.07) x 10(-5), where the first uncertainty is statistical and the second is systematic. The obtained CP asymmetries A(CP)(D-0 ->rho(0)gamma) = +0.056 +/- 0.152 +/- 0.006, A(CP)(D-0 -> phi gamma) = -0.094 +/- 0.066 +/- 0.001, and A(CP)(D-0 -> (K) over bar (*0) gamma = -0.003 +/- 0.020 +/- 0.000 are consistent with no CP violation. We also present an improved measurement of the branching fractions B(D-0 -> phi gamma) = (2.76 +/- 0.19 +/- 0.10) x 10(-5) and B(D-0 -> (K) over bar (*0) gamma = (4.66 +/- 0.21 +/- 0.21) x 10(-4).
Published: 2017
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36. Search for lepton-flavor and lepton-number-violating τ→ℓhh′ decay modes

Author: Marko Petrič, H. J. Hyun, P. Smerkol, T. A. Shibata, H. Miyata, M. Bischofberger, Y. Hoshi, S.I. Eidelman, P. Pakhlov, K. Hayasaka, I. Adachi, D. Matvienko, Y. Miyazaki, Yang Li, Norihito Muramatsu, S. Korpar, W. S. Hou, K. Trabelsi, H. J. Kim, Chang Liu, Z. P. Zhang, H. O. Kim, A. Bozek, S. Koblitz, D. M. Asner, Y. Choi, Yasuyuki Horii, C. P. Shen, A. Drutskoy, E. Nakano, Yukinori Sato, C. H. Wang, B.A. Shwartz, S. Uehara, R. Louvot, S. Nishida, J. G. Shiu, J. Dalseno, T. Aushev, Y. M. Goh, V. Gaur, M. Nakao, M. C. Chang, S. Okuno, G. Tatishvili, Phillip Urquijo, P. Krokovny, Jasvinder A. Singh, G. B. Mohanty, S. McOnie, Y. Iwasaki, Y. J. Kwon, Vladimir Zhulanov, B. Bhuyan, K. Cho, T. Iijima, Y. Yusa, M. Iwabuchi, Y. Teramoto, O. Schneider, T. E. Browder, O. Seon, Frank Simon, A.L. Sibidanov, D. Epifanov, Z. Q. Liu, B. R. Ko, A.S. Kuzmin, R. Mizuk, S. Ogawa, C. L. Lim, A. Moll, Y. S. Sohn, O. Nitoh, A. Garmash, M. Uchida, Y. Sakai, Hiroaki Aihara, H. K. Park, Y. Yamashita, M. J. Kim, D. Liventsev, T. Sumiyoshi, Byung Gu Cheon, Yongsun Kim, Yoshinobu Unno, T. Tsuboyama, Sang Hoon Lee, G. S. Varner, M. Starič, R. Itoh, S. Uno, C. Schwanda, K. T. Kim, Y. Onuki, K. Miyabayashi, P. Wang, T. Sanuki, L. E. Piilonen, V. Bhardwaj, Peter Kodys, C. Kiesling, H. Sahoo, Sunmin Ryu, E. Won, K. Senyo, G. Pakhlova, J. Haba, V.M. Aulchenko, Z. Doležal, E. Solovieva, M. Bračko, T. Julius, Po-Hsun Chen, R. Chistov, Samo Stanič, A. M. Bakich, T. Ohshima, N. Gabyshev, H. Hayashii, K. Inami, A. Chen, M. Shapkin, M. Röhrken, A. Ishikawa, A. Bay, C. W. Park, P. Križan, Andrey Sokolov, J. H. Kang, K. Nishimura, and James E. Fast
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Muon, Meson, 010308 nuclear & particles physics, Electron–positron annihilation, High Energy Physics::Phenomenology, Electron, 01 natural sciences, Lepton number, Nuclear physics, KEKB, Tau neutrino, 0103 physical sciences, High Energy Physics::Experiment, 010306 general physics, Lepton
Abstract: We search for lepton-flavor and lepton-number-violating τ decays into a lepton (l= electron or muon) and two charged mesons ( h , h ′ = π ± or K ± ) using 854 fb − 1 of data collected with the Belle detector at the KEKB asymmetric-energy e + e − collider. We obtain 90% confidence level upper limits on the τ → l h h ′ branching fractions in the range ( 2.0 – 8.4 ) × 10 − 8 . These results improve upon our previously published upper limits by factors of about 1.8 on average.
Published: 2013
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37. Search for a dark vector gauge boson decaying toπ+π−usingη→π+π−γdecays

Author: R. Mizuk, S. Nishida, Z. Drásal, Z. Natkaniec, T. Matsuda, H. Miyata, E. L. Barberio, V. Chekelian, E. Nakano, Chawon Park, M. Nayak, T. Schlüter, Dipanwita Dutta, C. H. Li, H. Nakazawa, G. Schnell, T. Iijima, Y. Choi, K. J. Nath, V. V. Zhulanov, P. Krokovny, K. Hayasaka, A. Bobrov, A. Zupanc, L. Santelj, B. G. Cheon, K. H. Kang, K. Cho, M. Masuda, T. Kuhr, K. T. Kim, K. Chilikin, Y. J. Kim, Tao Luo, G. B. Mohanty, R. Gillard, K. Trabelsi, U. Tamponi, B. Bhuyan, Y. Yook, B. G. Fulsom, J. Haba, D. Cinabro, H. Hayashii, C. P. Shen, A. Garmash, Seok Kim, Daniel Greenwald, D. Epifanov, D. Y. Kim, V. Savinov, B. Pal, T.-A. Shibata, V. Bansal, V.N. Zhilich, K. K. Joo, L. E. Piilonen, D. Matvienko, T. Aushev, Y. Watanabe, Peter Kodys, V.E. Shebalin, Yukinori Sato, J. G. Shiu, S. Eidelman, R. Kulasiri, P. Pakhlov, T. K. Pedlar, Y. Sakai, G. Inguglia, M. Takizawa, I. Jaegle, K. Miyabayashi, I. Badhrees, S. Al Said, P. K. Behera, Victoria Zhukova, T. Ferber, Y. Yusa, S. Di Carlo, A. Chen, K. Inami, Z. Doležal, D. Semmler, A. Bozek, H. B. Jeon, Phillip Urquijo, K. Senyo, Ihn Sik Seong, C. Z. Yuan, A. Ishikawa, Y. Iwasaki, Y. J. Kwon, T. Kawasaki, Y. B. Li, K. Kinoshita, S. Uno, J. Yamaoka, C. H. Wang, T. Julius, P. Križan, C. Schwanda, C. B. Van Hulse, M. Uchida, L. K. Li, O. Schneider, S. Paul, L. Li Gioi, M. Bračko, V. Chobanova, H. Farhat, J. B. Kim, D. Liventsev, S. Okuno, R. Chistov, G. S. Varner, P. Goldenzweig, J. Rauch, S. Sandilya, F. Tenchini, M. J. Kim, R. Itoh, H. Ye, N. Dash, M. Starič, T. Sumiyoshi, Meng Wang, C. Pulvermacher, Martin Ritter, J. Libby, T. Sanuki, A. M. Bakich, Y. Seino, J. E. Fast, M. Watanabe, N. Gabyshev, D. Červenkov, I. S. Lee, Eberhard Widmann, D. Joffe, O. Seon, Frank Simon, Y. Unno, I. Adachi, H. Sahoo, T. Uglov, S. Ogawa, Kevin Varvell, R. Ayad, S. Uehara, H. Aihara, Y. Usov, D. M. Asner, Jyoti Prakash Biswal, T. Nanut, V. Gaur, M. Nakao, Z. P. Zhang, E. Won, J. S. Lange, W. S. Hou, and V. Vorobyev
Subjects: Physics, Quark, Gauge boson, Particle physics, 010308 nuclear & particles physics, Fine-structure constant, 01 natural sciences, Belle experiment, law.invention, Baryon, Nuclear physics, KEKB, law, 0103 physical sciences, High Energy Physics::Experiment, Decay chain, 010306 general physics, Collider
Abstract: We report a search for a dark vector gauge boson U' that couples to quarks in the decay chain D*(+) -> D-0 pi(+), D-0 -> K-S(0) eta, eta -> U'gamma, U' -> pi(+)pi- No signal is found and we set a mass-dependent limit on the baryonic fine structure constant of 10(-3)-10(-2) in the U' mass range of 290 to 520 MeV/c(2). This analysis is based on a data sample of 976 fb(-1) collected by the Belle experiment at the KEKB asymmetric-energy e(+)e(-) collider.
Published: 2016
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38. Measurement of the branching ratio of B¯0→D+τ−ν¯τ relative to B¯0→D+ℓ−ν¯ℓ decays with a semileptonic tagging method

Author: Z. Natkaniec, H. Farhat, J. B. Kim, H. Yamamoto, T. Matsuda, D. Epifanov, Y. Sakai, V. Bhardwaj, T. K. Pedlar, A. Moll, G. Bonvicini, S. L. Olsen, Victoria Zhukova, M. V. Purohit, A. Vinokurova, A. Chen, D. M. Asner, K. Senyo, T. Kawasaki, B. Shwartz, P. Goldenzweig, S. Sandilya, M. Uchida, L. K. Li, A. J. Schwartz, Tao Luo, E. Solovieva, P. Krokovny, K. H. Kang, K. Cho, V. Chobanova, M. J. Kim, M. Starič, D. Liventsev, Tariq Aziz, H. Hayashii, G. Schnell, U. Tamponi, J. Rauch, T. Iijima, G. S. Varner, Y. Ushiroda, E. Nakano, Y. Choi, K. J. Nath, T. Hara, L. Santelj, A. M. Bakich, J. Libby, V.N. Zhilich, D. Joffe, Y. Watanabe, B. Golob, S. Ogawa, R. Itoh, C. B. Van Hulse, N. K. Nisar, B. Bhuyan, A. Rostomyan, P. Wang, Y. Kato, B. G. Fulsom, T.-A. Shibata, K. T. Kim, L. Pesántez, T. Kuhr, O. Seon, Frank Simon, H. B. Jeon, T. Schlüter, Dipanwita Dutta, H. K. Moon, J. S. Lange, I. Jaegle, K. Miyabayashi, I. Badhrees, A. Ishikawa, Y. Iwasaki, C. H. Li, Marko Petrič, N. Gabyshev, D. Červenkov, R. Ayad, Y. J. Kwon, K. Nakamura, O. Schneider, C. H. Wang, K. Trabelsi, Y. Onuki, V. Savinov, Y. Yusa, M. Rozanska, M. Danilov, D. Kotchetkov, Y. Seino, Tara Nanut, K. Hara, C. P. Shen, J. Hasenbusch, S. Paul, L. Li Gioi, Y. Yamashita, E. Won, D. Matvienko, S. Nishida, K. Chilikin, Y. J. Kim, D. Cinabro, K. Inami, Seok Kim, V. Babu, Shigeki Hirose, V. Chekelian, H. Atmacan, T. Horiguchi, P. Chang, T. Aushev, B. K. Pal, S. Eidelman, P. Pakhlov, T. Ferber, K. Adamczyk, S. Okuno, M. Bračko, R. Pestotnik, M. Takizawa, A. Garmash, Daniel Greenwald, J. Yamaoka, A. Bozek, V. Bansal, K. M. Williams, M. Z. Wang, K. Kinoshita, John Yelton, M. E. Sevior, W. S. Hou, J. E. Fast, Z. Doležal, A. Zupanc, J. F. Strube, H. Miyata, Chawon Park, P. K. Behera, V. V. Zhulanov, V. Vorobyev, Samo Stanič, Y. Yook, K. Hayasaka, C. Z. Yuan, D. Y. Kim, R. Mizuk, M. Masuda, G. B. Mohanty, B. G. Cheon, S. Korpar, Peter Kodys, P. Katrenko, S. Di Carlo, L. E. Piilonen, N. Dash, K. Negishi, G. Pakhlova, Yukinori Sato, J. G. Shiu, T. Julius, Phillip Urquijo, Y. B. Li, R. Chistov, F. Tenchini, T. Sumiyoshi, H. Aihara, Y. Usov, Z. P. Zhang, S. Uno, C. Schwanda, Jyoti Prakash Biswal, Rahul Kumar, V. Gaur, M. Nakao, V.E. Shebalin, and M. Nayak
Subjects: Physics, Particle physics, Muon, 010308 nuclear & particles physics, Branching fraction, Electron–positron annihilation, High Energy Physics::Phenomenology, Resonance, 01 natural sciences, Standard Model, Nuclear physics, KEKB, 0103 physical sciences, High Energy Physics::Experiment, B meson, 010306 general physics, Bar (unit)
Abstract: We report a measurement of the ratio R(D*) = B((B) over bar (0) -> D*(+)tau(-)(nu) over bar (tau))/B((B) over bar (0) -> D*(+)l(-)(nu) over bar (l))where l denotes an electron or a muon. The results are based on a data sample containing 772 x 10(6) B (B) over bar pairs recorded at the Upsilon(4S) resonance with the Belle detector at the KEKB e(+)e(-) collider. We select a sample of B-0(B) over bar (0) pairs by reconstructing both B mesons in semileptonic decays to D*(-/+)l(+/-). We measure R(D*) = 0.302 +/- 0.030(stat) +/- 0.011(syst), which is within 1.6 sigma of the Standard Model theoretical expectation, where the standard deviation sigma includes systematic uncertainties. We use this measurement to constrain several scenarios of new physics in a model-independent approach.
Published: 2016
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39. Energy Scan of thee+e−→hb(nP)π+π−(n=1, 2) Cross Sections and Evidence forϒ(11020)Decays into Charged Bottomoniumlike States

Author: A. Drutskoy, M. Niiyama, T. Matsuda, S. Uno, S. L. Olsen, K. Trabelsi, G. Bonvicini, J. Libby, C. H. Li, S. H. Kim, P. Krokovny, C. L. Hsu, C. Pulvermacher, K. H. Kang, Y. Watanabe, T. Aushev, Marko Petrič, A. Zupanc, K. Senyo, S. Nishida, Y. Seino, J. G. Shiu, B.A. Shwartz, T. Sumiyoshi, J. Dalseno, N. K. Nisar, Peter Kodys, T. Ferber, Martin Ritter, P. Katrenko, Y. Yamashita, M. Uchida, T. Sanuki, D. Matvienko, Phillip Urquijo, E. Nakano, D. Liventsev, V. Chobanova, D. Cinabro, T. K. Pedlar, A. Moll, Vladimir Zhulanov, G. Schnell, B. Pal, Z. P. Zhang, A. Garmash, K. Negishi, H. Li, M. E. Sevior, M. Lubej, Y. Onuki, L. E. Piilonen, P. Goldenzweig, D. M. Asner, G. Inguglia, C. Van Hulse, V. Zhukova, D. Semmler, G. S. Varner, J. Stypula, T. Luo, M. Masuda, Daniel Greenwald, T. Schlüter, R. Mizuk, C. Z. Yuan, D. A. Epifanov, T. A. Shibata, H. Miyata, Prafulla Kumar Behera, I. Tikhomirov, P. Wang, S. Okuno, V.M. Aulchenko, T. Julius, T. Kuhr, S.I. Eidelman, B. G. Fulsom, G. B. Mohanty, B. G. Cheon, K. Hayasaka, E. L. Barberio, Y. Teramoto, H. Atmacan, Y. Unno, Ruslan Chistov, Yongsun Kim, Jyoti Prakash Biswal, R. Ayad, S. Korpar, D. Y. Kim, C. Schwanda, P. Pakhlov, V. Gaur, I. Adachi, J. Yamaoka, J. B. Kim, H. J. Kim, E. Solovieva, A.E. Bondar, M. Takizawa, G. Pakhlova, A. Kuzmin, Kiyoshi Tanida, T. Hara, H. Aihara, N. Dash, Y. Usov, S. Ogawa, V. Bhardwaj, D. Kotchetkov, K. M. Williams, A. Chen, John Yelton, Z. Doležal, X. L. Wang, H. Park, Mikhail Danilov, A. Bozek, K. T. Kim, Tara Nanut, R. Gillard, T. Uglov, L. Li Gioi, S. K. Choi, O. Seon, Frank Simon, Y. Choi, K. J. Nath, R. Pestotnik, C. H. Wang, B. Bhuyan, T. E. Browder, Y. Sakai, Y. M. Goh, A. Bobrov, V.E. Shebalin, H. Hayashii, V. Savinov, Soumen Paul, Liangbin Li, V. Chekelian, K. Chilikin, K. Inami, M. Z. Wang, K. Kinoshita, U. Tamponi, V.N. Zhilich, I. Jaegle, S. Sandilya, K. Miyabayashi, I. Badhrees, M. J. Kim, M. Bračko, M. Starič, Y. Iwasaki, Y. J. Kwon, O. Schneider, B. Golob, A. M. Bakich, J. S. Lange, E. Won, D. Červenkov, W. S. Hou, V. Vorobyev, A. Ishikawa, M. Nakao, and C. W. Park
Subjects: Physics, KEKB, Isovector, 010308 nuclear & particles physics, Electron–positron annihilation, 0103 physical sciences, Pi, General Physics and Astronomy, Intermediate state, Atomic physics, 010306 general physics, 01 natural sciences
Abstract: Using data collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider, we measure the energy dependence of the e(+)e(-) -> h(b)(nP)pi(+)pi(-) (n = 1, 2) cross sections from thresholds up to 11.02 GeV. We find clear gamma(10860) and gamma(11020) peaks with little or no continuum contribution. We study the resonant substructure of the gamma(11020) -> h(b)(nP)pi(+)pi(_) transitions and find evidence that they proceed entirely via the intermediate isovector states Z(b)(10610) and Z(b)(10650). The relative fraction of these states is loosely constrained by the current data: The hypothesis that only Z(b)(10610) is produced is excluded at the level of 3.3 standard deviations, while the hypothesis that only Z(b)(10650) is produced is not excluded at a significant level.
Published: 2016
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40. Study of excitedΞcstates decaying intoΞc0andΞc+baryons

Author: M. Starič, J. E. Fast, T. Matsuda, B. Bhuyan, K. Miyabayashi, I. Badhrees, B. G. Fulsom, M. Takizawa, G. Bonvicini, P. Goldenzweig, S. Sandilya, K. M. Williams, V.E. Shebalin, John Yelton, Y. Choi, A. Vinokurova, K. T. Kim, R. Gillard, F. Tenchini, E. Barberio, G. Pakhlova, M. E. Sevior, S. H. Kim, U. Tamponi, D. Cinabro, H. B. Jeon, G. Inguglia, V. Savinov, H. K. Moon, J. S. Lange, T. Kumita, M. Danilov, M. Niiyama, G. Schnell, A. Ishikawa, C. H. Wang, T. Aushev, K. H. Kang, K. Cho, T. E. Browder, Jyoti Prakash Biswal, T. Julius, K. Hayasaka, M. Sumihama, M. Uchida, M. Nayak, H. Farhat, Z. P. Zhang, P. Wang, J. B. Kim, S. Nishida, T. Ferber, G. Varner, V. Gaur, S. Uno, L. K. Li, Eberhard Widmann, J. F. Strube, E. Won, T. Sumiyoshi, Andrey Sokolov, Y. Iwasaki, B. Pal, S. Paul, B. G. Cheon, Y. J. Kwon, D. Matvienko, A. Zupanc, T. K. Pedlar, O. Schneider, Samo Korpar, N. Dash, Chawon Park, S. Okuno, C. Schwanda, A. Moll, E. Solovieva, R. Itoh, V. V. Zhulanov, A. Rostomyan, J. G. Shiu, Phillip Urquijo, Y. B. Li, Hiroaki Aihara, Peter Kodys, N. Gabyshev, Y. Watanabe, V. M. Aulchenko, Y. Usov, C. Z. Yuan, A. Garmash, W. W. Jacobs, T. Schlueter, Tao Luo, C. Pulvermacher, Samo Stanič, K. Tanida, Zdenek Dolezal, Martin Ritter, D. Kotchetkov, T. Sanuki, D. M. Asner, S. Di Carlo, Semen Eidelman, T. Nanut, W. S. Hou, C. P. Shen, Y. Sakai, Hui Li, K. Negishi, I. Adachi, D. Y. Kim, J. Libby, M. Lubej, S. Ogawa, P. Pakhlov, P. Krizan, R. Mizuk, H. Miyata, T. Uglov, K. Senyo, Leo Piilonen, D. Joffe, D. Liventsev, H. Park, A. Kuzmin, Y. Seino, A. M. Bakich, O. Seon, Dipanwita Dutta, C. H. Li, R. Ayad, M. Bračko, M. Masuda, G. B. Mohanty, D. Červenkov, Victoria Zhukova, T.-A. Shibata, A. Chen, Seema Bahinipati, K. J. Nath, T. Hara, L. Santelj, Z. Drásal, P. Krokovny, A. Bozek, K. Chilikin, P. K. Behera, E. Kato, H. Hayashii, R. Pestotnik, K. K. Joo, C. B. Van Hulse, M. Z. Wang, K. Kinoshita, V.N. Zhilich, and Y. Kato
Subjects: Physics, Annihilation, 010308 nuclear & particles physics, Electron–positron annihilation, 01 natural sciences, 7. Clean energy, Nuclear physics, Baryon, KEKB, Pion, Photon emission, Excited state, 0103 physical sciences, High Energy Physics::Experiment, Atomic physics, 010306 general physics, Ground state
Abstract: Using a data sample of 980 fb(-1) of e(+)e(-) annihilation data taken with the Belle detector operating at the KEKB asymmetric-energy e(+)e(-) collider, we report the results of a study of excited Xi(c) states that decay, via the emission of photons and/or charged pions, into Xi(0)(c) or Xi(+)(c) ground state charmed-strange baryons. We present new measurements of the masses of all members of the Xi(0)(c), Xi(c)(2645), Xi(c)(2790), Xi(c)(2815), and Xi(c)(2980) isodoublets, measurements of the intrinsic widths of those that decay strongly, and evidence of previously unknown transitions.
Published: 2016
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41. Measurement of the CKM angleφ1inB0→D¯(*)0h0,D¯0→KS0π+π−decays with time-dependent binned Dalitz plot analysis

Author: Y. Sakai, T. Matsuda, P. Goldenzweig, S. Sandilya, N. Dash, E. Solovieva, B. G. Cheon, M. Starič, Hui Li, K. T. Kim, M. Masuda, G. B. Mohanty, A. Vinokurova, J. F. Strube, T. Kumita, J. Haba, Marko Petrič, J. E. Fast, P. Krokovny, K. H. Kang, K. Cho, A. Zupanc, L. E. Piilonen, Y. Iwasaki, D. Joffe, Y. J. Kwon, D. Matvienko, K. Senyo, R. Mizuk, D. Epifanov, T. Schlüter, Dipanwita Dutta, G. Pakhlova, Z. Drásal, C. Kiesling, H. K. Moon, M. Bračko, J. Rauch, A. M. Bakich, J. S. Lange, N. Gabyshev, D. Červenkov, O. Schneider, Frank Simon, S. Yashchenko, C. H. Li, B. Pal, M. Uchida, C. B. Van Hulse, L. K. Li, Z. P. Zhang, T. Julius, R. Ayad, V.N. Zhilich, V. Chobanova, K. Trabelsi, D. Liventsev, G. Schnell, V. Bhardwaj, T. K. Pedlar, R. Chistov, A. Moll, J. G. Shiu, C. P. Shen, D. Kotchetkov, C. W. Park, E. Won, G. S. Varner, Seok Kim, R. Itoh, T. Aushev, H. Hayashii, Hyunyong Kim, Peter Kodys, W. W. Jacobs, F. Tenchini, Phillip Urquijo, P. Wang, P. Vanhoefer, T. Sumiyoshi, Martin Ritter, T. Ferber, S. Di Carlo, D. M. Asner, T.-A. Shibata, B. Shwartz, Jyoti Prakash Biswal, W. S. Hou, T. Sanuki, K. Negishi, T. Nanut, J. Yamaoka, I. Jaegle, K. Miyabayashi, I. Badhrees, V. Gaur, K. K. Joo, V. Vorobyev, K. Inami, Victoria Zhukova, Yang Li, Seema Bahinipati, A. Garmash, Y. Choi, K. J. Nath, A. Chen, Daniel Greenwald, S. Ogawa, I. Adachi, M. Nakao, B. Bhuyan, B. G. Fulsom, K. Chilikin, M. Z. Wang, K. Kinoshita, P. K. Behera, R. Pestotnik, T. E. Browder, T. Uglov, Rahul Kumar, Kevin Varvell, D. Cinabro, A.E. Bondar, V. Savinov, M. Danilov, M. Takizawa, V.E. Shebalin, K. M. Williams, A. J. Schwartz, H. Aihara, John Yelton, Z. Doležal, Y. Usov, G. Inguglia, S. Eidelman, P. Pakhlov, H. Park, A. Bozek, M. Nayak, A. Drutskoy, Andrey Sokolov, S. Nishida, H. Farhat, J. B. Kim, V. Chekelian, Chawon Park, H. Miyata, J. Libby, M. Lubej, S. Uno, C. Schwanda, V. V. Zhulanov, K. Hayasaka, A. Bobrov, Y. Seino, S. Okuno, R. Mussa, A. Ishikawa, P. Križan, Y. Watanabe, D. Y. Kim, M. E. Sevior, C. H. Wang, S. Paul, and Y. Yamashita
Subjects: Physics, Particle physics, 010308 nuclear & particles physics, Cabibbo–Kobayashi–Maskawa matrix, Electron–positron annihilation, Resonance, Dalitz plot, 01 natural sciences, KEKB, 0103 physical sciences, Pi, CP violation, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Bar (unit)
Abstract: We report a measurement of the CP-violation parameter phi(1) obtained in a time-dependent analysis of B-0 -> (D) over bar(*)(0)h(0) decays followed by (D) over bar (0) -> K-S(0)pi(+)pi decay. A model-independent measurement is performed using the binned Dalitz plot technique. The measured value is phi(1) = 11.7 degrees +/- 7.8 degrees(stat) +/- 2.1 degrees (syst). Treating sin 2 phi(1) and cos 2 phi(1) as independent parameters, we obtain sin 2 phi(1) = 0.43 +/- 0.27(stat) +/- 0.08(syst) and cos 2 phi(1) = 1.06 +/- 0.33(stat)(-0.15)(+0.21)(syst). The results are obtained with a full data sample of 772 x 10(6)B (B) over bar pairs collected near the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider.
Published: 2016
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42. Studies of charmed strange baryons in theΛDfinal state at Belle

Author: G. B. Mohanty, S. Okuno, R. Mussa, A. Ishikawa, D. Liventsev, G. Schnell, T. Iijima, Vladimir Zhulanov, M. Uchida, M. Niiyama, Liangbin Li, M. Nakao, M. Watanabe, M. E. Sevior, P. Križan, P. Goldenzweig, Yang Li, S. L. Olsen, V. Chobanova, V. Chekelian, J. Rauch, Y. Choi, K. J. Nath, T. Kuhr, L. Santelj, V. Bhardwaj, A.E. Bondar, Y. Sakai, Peter Kodys, A. M. Bakich, T. A. Shibata, H. Miyata, Prafulla Kumar Behera, S.I. Eidelman, M. Takizawa, Kiyoshi Tanida, S. Nishida, Z. Natkaniec, Y. Yamashita, J. Haba, B. Bhuyan, John Yelton, Marko Petrič, S. Hirose, J. Libby, K. Hayasaka, C. H. Li, T. E. Browder, Z. Drásal, S. Di Carlo, R. Glattauer, Z. Doležal, H. K. Moon, H. Ye, H. Farhat, B. G. Cheon, H. Li, G. S. Varner, A. Bobrov, J. S. Lange, A. Zupanc, K. T. Kim, T. Luo, Ruslan Chistov, N. Gabyshev, D. Červenkov, R. Gillard, E. Kato, Y. Seino, S. K. Choi, Kevin Varvell, T. Ferber, R. Itoh, S. Sandilya, A. Kuzmin, D. Cinabro, T. Schlüter, V. Savinov, Andrey Sokolov, F. Tenchini, S. Ogawa, Mikhail Danilov, B. Pal, W. S. Hou, H. Hayashii, M. Lubej, G. Inguglia, V. Zhukova, S. Korpar, Dipanwita Dutta, A. Rostomyan, C. Kiesling, P. Pakhlov, P. Wang, T. Sumiyoshi, K. K. Joo, Y. Watanabe, B. G. Fulsom, C. Z. Yuan, V. Vorobyev, K. Kinoshita, Martin Ritter, D. A. Epifanov, H. Aihara, James E. Fast, M. Bračko, O. Seon, M. Starič, Y. Usov, J. G. Shiu, T. Sanuki, Y. Yook, J. Dalseno, O. Grzymkowska, C. H. Wang, C. Pulvermacher, G. Pakhlova, Jyoti Prakash Biswal, S. Wehle, R. Pestotnik, V.N. Zhilich, Y. Kato, Phillip Urquijo, K. Trabelsi, H. Park, A. Bozek, D. Matvienko, E. Won, M. Nayak, C. P. Shen, V. Gaur, I. Jaegle, K. Miyabayashi, I. Badhrees, K. M. Williams, Ihn Sik Seong, K. Chilikin, J. Yamaoka, L. Li Gioi, A. Garmash, C. S. Park, L. E. Piilonen, Y. Iwasaki, Y. J. Kwon, M. Masuda, D. M. Asner, E. Solovieva, S. Uehara, O. Schneider, N. Dash, S. Yashchenko, T. Julius, D. Kotchetkov, K. Senyo, Z. P. Zhang, M. Sumihama, V.M. Aulchenko, E. L. Barberio, Saraju P. Mohanty, I. Adachi, J. B. Kim, Yongsun Kim, C. Schwanda, R. Ayad, D. Y. Kim, R. Mizuk, Y. Unno, T. Matsuda, S. Uno, G. Bonvicini, S. H. Kim, P. Krokovny, K. Cho, A. Moll, D. Semmler, Tara Nanut, and T. Uglov
Subjects: Nuclear physics, Physics, Baryon, Particle physics, KEKB, 010308 nuclear & particles physics, Electron–positron annihilation, 0103 physical sciences, Hyperon, 010306 general physics, 01 natural sciences
Abstract: We report the discovery of Ξc(3055)0, observed by its decay into the final-state ΛD0, and present the first observation and evidence of the decays of Ξc(3055)+ and Ξc(3080)+ into ΛD+. We also perform a combined analysis of the ΛD+ with the Σc++K- and Σc∗++K- decay modes to measure the ratios of branching fractions, masses and widths with improved accuracy. We measure the ratios of branching fractions B(Ξc(3055)+→ΛD+)/B(Ξc(3055)+→Σc++K-)=5.09±1.01±0.76, B(Ξc(3080)+→ΛD+)/B(Ξc(3080)+→Σc++K-)=1.29±0.30±0.15, and B(Ξc(3080)+→Σc∗++K-)/B(Ξc(3080)+→Σc++K-)=1.07±0.27±0.04, where the uncertainties are statistical and systematic. The analysis is performed using a 980 fb-1 data sample collected with the Belle detector at the KEKB asymmetric-energy e+e- collider.
Published: 2016
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43. Search for a massive invisible particleX0inB+→e+X0andB+→μ+X0decays

Author: Yuki Sato, T. E. Browder, C. Pulvermacher, Mikhail Danilov, K. Chilikin, Saraju P. Mohanty, T. A. Shibata, H. Miyata, K. Inami, Prafulla Kumar Behera, V. Babu, E. Nakano, S.I. Eidelman, R. Mizuk, N. Dash, K. Hayasaka, S. Uno, S. Nishida, D. Cinabro, V. Bhardwaj, S. Sandilya, C. Van Hulse, L. E. Piilonen, M. Z. Wang, K. Kinoshita, U. Tamponi, Toru Iijima, A. Zupanc, G. B. Mohanty, Liangbin Li, A. Rostomyan, Ruslan Chistov, V. Chekelian, T. Schlüter, Dipanwita Dutta, G. Inguglia, K. Trabelsi, H. Ye, Y. Yusa, Andrey Sokolov, Y. Watanabe, S. Yashchenko, C. P. Shen, G. Bonvicini, J. Rauch, B. Pal, P. Križan, Hiroaki Aihara, T. Julius, P. Pakhlov, A. Moll, J. Stypula, James E. Fast, Y. Yook, T. Aushev, A. M. Bakich, T. Ferber, D. Y. Kim, M. Nayak, I. Badhrees, H. Hayashii, R. Mussa, Yang Li, H. B. Jeon, B.A. Shwartz, Y. Choi, I. Jaegle, S. H. Kim, P. Krokovny, K. H. Kang, K. Cho, A. Ishikawa, H. Park, K. J. Nath, A. Bozek, S. Okuno, N. K. Nisar, T. Hara, L. Santelj, J. G. Shiu, C. W. Park, I. Adachi, G. Pakhlova, Marko Petrič, Phillip Urquijo, Z. Doležal, N. Gabyshev, D. Červenkov, T. Sumiyoshi, D. Liventsev, Vladimir Zhulanov, O. Seon, Frank Simon, M. E. Sevior, I. S. Lee, Martin Ritter, J. B. Kim, P. Goldenzweig, Y. M. Goh, K. Senyo, O. Grzymkowska, C. H. Wang, P. Lukin, E. L. Barberio, T. Sanuki, D. Matvienko, J. Dalseno, Y. Teramoto, G. Schnell, V.E. Shebalin, D. M. Asner, T. K. Pedlar, Y. Sakai, E. Kato, Samo Stanič, L. Li Gioi, A. Garmash, J. Libby, M. Lubej, C. H. Li, A. Chen, C. S. Park, D. Semmler, M. Bračko, J. Yamaoka, B. G. Cheon, Jyoti Prakash Biswal, Y. Seino, V. Gaur, M. Nakao, K. T. Kim, R. Gillard, S. Korpar, S. Ogawa, Christoph Schwanda, Z. P. Zhang, T. Uglov, Kevin Varvell, K. Negishi, Y. Usov, H. K. Moon, Sunmin Ryu, E. Won, P. Vanhoefer, W. S. Hou, M. V. Purohit, M. Heck, M. Uchida, V. Chobanova, G. S. Varner, R. Itoh, P. Wang, M. N. Wagner, B. G. Fulsom, V.N. Zhilich, K. Miyabayashi, A. J. Schwartz, H. Farhat, Peter Kodys, P. Katrenko, M. J. Kim, M. Starič, Y. Iwasaki, Y. J. Kwon, O. Schneider, A.S. Kuzmin, Yoshinobu Unno, and M. Masuda
Subjects: Physics, Particle physics, 010308 nuclear & particles physics, Hadron, Rest frame, 01 natural sciences, Resonance (particle physics), law.invention, Momentum, KEKB, law, 0103 physical sciences, High Energy Physics::Experiment, B meson, 010306 general physics, Collider, Lepton
Abstract: We present a search for a non-Standard-Model invisible particle X-0 in the mass range 0.1-1.8 GeV/c(2) in B+ -> e(+)X(0) and B+ -> mu X-+(0) decays. The results are obtained from a 711 fb(-1) data sample that corresponds to 772 x 10(6) B (B) over bar pairs, collected at the Upsilon(4S) resonance with the Belle detector at the KEKB e(+)e(-) collider. One B meson is fully reconstructed in a hadronic mode to determine the momentum of the lepton of the signal decay in the rest frame of the recoiling partner B meson. We find no evidence of a signal and set upper limits on the order of 10(-6).
Published: 2016
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44. First observation ofγγ→pp¯K+K−and search for exotic baryons inpKsystems

Author: S. L. Olsen, K. Trabelsi, Yang Li, W. Ostrowicz, D. Cinabro, Y. Choi, C. P. Shen, K. J. Nath, F. Tenchini, L. Santelj, G. Inguglia, V. Zhukova, P. Chang, Wenxing Fang, T. Sumiyoshi, T. Uglov, Martin Ritter, Marko Petrič, B.A. Shwartz, R. Ayad, D. Liventsev, Vladimir Zhulanov, M. E. Sevior, P. Goldenzweig, O. Grzymkowska, C. H. Wang, T. Sanuki, Z. Drásal, J. Haba, A. Zupanc, M. Takizawa, Kiyoshi Tanida, U. Tamponi, S. Uehara, A. Moll, T. A. Shibata, H. Miyata, T. Iijima, V. Babu, Prafulla Kumar Behera, John Yelton, Z. Doležal, N. Dash, V.M. Aulchenko, B. Pal, T. Aushev, D. Y. Kim, E. L. Barberio, S.I. Eidelman, V.N. Zhilich, B. G. Cheon, G. B. Mohanty, D. Matvienko, C. C. Zhang, Y. Yusa, M. Watanabe, J. Stypula, T. Ferber, I. Adachi, I. Jaegle, K. Miyabayashi, C. Z. Yuan, Y. Iwasaki, Y. J. Kwon, K. T. Kim, J. B. Kim, Z. P. Zhang, O. Schneider, I. Badhrees, Yoshinobu Unno, A. Kuzmin, M. Sumihama, K. K. Joo, E. Won, K. Senyo, J. Libby, S. Ogawa, J. Dalseno, R. Gillard, S. K. Choi, J. Yamaoka, L. E. Piilonen, Saraju P. Mohanty, J. Rauch, M. Lubej, K. Hayasaka, C. H. Li, R. Glattauer, D. M. Asner, S. Korpar, Mikhail Danilov, R. Mizuk, R. Mussa, M. Masuda, E. Kato, Ruslan Chistov, H. B. Jeon, Yongsun Kim, E. Nakano, Jyoti Prakash Biswal, A. Ishikawa, C. Pulvermacher, T. Julius, K. Chilikin, S. Uno, C. Schwanda, Y. Seino, S. Sandilya, V. Gaur, C. Van Hulse, D. Semmler, J. G. Shiu, A. Garmash, C. S. Park, P. Križan, M. Nakao, Meng Wang, T. Matsuda, Y. Watanabe, M. Starič, K. Inami, T. Schlüter, Dipanwita Dutta, G. Bonvicini, Andrey Sokolov, Phillip Urquijo, Peter Kodys, T. Nanut, R. Pestotnik, H. Li, H. Aihara, D. Kotchetkov, Y. Usov, H. K. Moon, J. S. Lange, S. H. Kim, P. Krokovny, A. M. Bakich, K. M. Williams, A. Chen, James E. Fast, K. H. Kang, K. Cho, Frank Simon, W. S. Hou, G. Pakhlova, Y. Yook, J. F. Strube, L. Li Gioi, Z. Natkaniec, H. Hayashii, Y. Sakai, E. Solovieva, N. Gabyshev, D. Červenkov, G. Schnell, Samo Stanič, Ihn Sik Seong, M. Uchida, V. Chobanova, V. Bhardwaj, G. S. Varner, T. Luo, R. Itoh, P. Wang, C. Kiesling, B. G. Fulsom, M. Bračko, S. Nishida, Liangbin Li, V. Chekelian, P. Pakhlov, H. Park, A. Bozek, B. Bhuyan, T. E. Browder, A. Bobrov, V. Savinov, and L. Pesántez
Subjects: Nuclear physics, Physics, KEKB, 010308 nuclear & particles physics, Electron–positron annihilation, 0103 physical sciences, Analytical chemistry, Exotic hadron, 010306 general physics, 01 natural sciences, Gamma gamma
Abstract: The process gamma gamma -> p (p) over barK(+)K(-) and its intermediate processes are measured for the first time using a 980 fb(-1) data sample collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The production of p (p) over barK(+)K(-) and a Lambda(1520)(0) ((Lambda) over bar (1520)(0)) signal in the pK(-) ((p) over barK(+)) invariant mass spectrum are clearly observed. However, no evidence for an exotic baryon near 1540 MeV/c(2), denoted as Theta(1540)(0) ((Theta) over bar (1540)(0)) or Theta(1540)(++) (Theta(1540)(--)), is seen in the pK(-) ((p) over barK(+)) or pK(+) ((p) over barK(-)) invariant mass spectra. Cross sections for gamma gamma -> p (p) over barK(+)K(-), Lambda(1520)(0)(p) over barK(+) + c.c. and the products sigma(gamma gamma -> Theta(1540)(0)(p) over barK(+) + c.c.)B(Theta(1540)(0) -> pK(-)) and sigma(gamma gamma -> Theta(1540)(++)(p) over barK(-) + c.c.)B(Theta(1540)(++) -> pK(+)) are measured. We also determine upper limits on the products of the chi(c0) and chi(c2) two-photon decay widths and their branching fractions to p (p) over barK(+)K(-) at the 90% credibility level.
Published: 2016
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45. First Observation of the Doubly Cabibbo-Suppressed Decay of a Charmed Baryon:Λc+→pK+π−

Author: R. Mizuk, S. K. Kim, M. Masuda, L. E. Piilonen, Kevin Varvell, Sunmin Ryu, Y. Unno, E. Won, P. L. Wang, R. Mussa, H. B. Jeon, H. Aihara, P. Hamer, Iki Adachi, J. B. Kim, D. Y. Kim, Y. Usov, G. Pakhlova, G. B. Mohanty, H. Farhat, P. Vanhoefer, A. Ishikawa, M. Nakao, V. Babu, M. Z. Wang, Y. Yusa, K. Kinoshita, U. Tamponi, T. Aushev, N. K. Nisar, M. Uchida, V. Chobanova, C. W. Park, P. Križan, S. Yashchenko, G. Bonvicini, C. H. Wang, Z. P. Zhang, T. Julius, Peter Kodys, A. Vinokurova, C. Kiesling, W. W. Jacobs, P. Katrenko, T. Ferber, Y. S. Sohn, W. S. Hou, V.N. Zhilich, R. Chistov, H. Ye, K. M. Williams, J. G. Shiu, G. Schnell, T. Iijima, Nagao Kobayashi, J. Dalseno, A. Chen, Marko Petrič, S. H. Kim, P. Krokovny, K. H. Kang, K. Cho, V.E. Shebalin, Seongbae Yang, A. Vossen, M. Bračko, H. Park, G. S. Varner, Y. Iwasaki, Y. J. Kwon, A. Bozek, L. Li Gioi, A. Garmash, Daniel Greenwald, K. Negishi, T. Kuhr, J. Rauch, K. Miyabayashi, T. Sumiyoshi, H. Sahoo, I. Badhrees, Phillip Urquijo, Yang Li, Z. Drásal, R. Itoh, O. Schneider, Tara Nanut, D. Matvienko, Martin Ritter, O. Seon, Frank Simon, Y. Choi, S. Sandilya, Jyoti Prakash Biswal, K. J. Nath, T. Sanuki, A. Rostomyan, A. M. Bakich, T. Uglov, M. N. Wagner, D. M. Asner, T. K. Pedlar, K. T. Kim, B. G. Fulsom, B. Bhuyan, A. Moll, Yuki Sato, R. Gillard, K. Senyo, V. Trusov, Y. Watanabe, K. Trabelsi, Y. Sakai, V. Gaur, A. Zupanc, Y. M. Goh, N. Gabyshev, D. Červenkov, H. K. Moon, H. Hayashii, J. S. Lange, A. J. Schwartz, E. Nakano, J. Yamaoka, V. Savinov, M. Danilov, B. Pal, Luka Santelj, M. Nayak, B. H. Kim, B. G. Cheon, M. J. Kim, J. Stypula, E. Kato, K. Chilikin, H. J. Kim, B.A. Shwartz, A. Kuzmin, C. Z. Yuan, Ihn Sik Seong, S. Nishida, T. E. Browder, M. Starič, Liangbin Li, M. Takizawa, Kiyoshi Tanida, Samo Stanič, I. Jaegle, T. Schlüter, Dipanwita Dutta, S. Korpar, V. Chekelian, S. Ogawa, K. K. Joo, R. Pestotnik, T. Hara, D. Liventsev, John Yelton, K. Inami, Z. Doležal, Vladimir Zhulanov, X. L. Wang, M. Sumihama, V.M. Aulchenko, E. L. Barberio, Yongsun Kim, S. Uno, C. Schwanda, Andrey Sokolov, H. Li, M. Niiyama, S. L. Olsen, J. Grygier, T. A. Shibata, H. Miyata, S.I. Eidelman, K. Hayasaka, James E. Fast, M. E. Sevior, I. S. Lee, C. Pulvermacher, P. Goldenzweig, D. Cinabro, J. Haba, M. Lubej, G. Inguglia, N. Dash, V. Bhardwaj, J. Libby, C. H. Li, Y. Seino, S. Okuno, and Y. Teramoto
Subjects: Physics, Particle physics, 010308 nuclear & particles physics, Branching fraction, Electron–positron annihilation, General Physics and Astronomy, Lambda, 01 natural sciences, law.invention, Nuclear physics, Baryon, KEKB, law, 0103 physical sciences, Pi, High Energy Physics::Experiment, 010306 general physics, Collider
Abstract: We report the first observation of the decay Lambda(+)(c) -> pK(+)pi(-) using a 980 fb(-1) data sample collected by the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. This is the first observation of a doubly Cabibbo-suppressed decay of a charmed baryon. We measure the branching ratio of this decay with respect to its Cabibbo-favored counterpart to be B(Lambda(+)(c) -> pK(+)pi(-))/B(Lambda(+)(c) -> pK(-)pi(+)) = (2.35 +/- 0.27 +/- 0.21) x 10(-3), where the uncertainties are statistical and systematic, respectively.
Published: 2016
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46. Search forXYZstates inϒ(1S)inclusive decays

Author: J. B. Kim, A. M. Bakich, R. Mussa, A. Moll, H. B. Jeon, S. Okuno, P. Wang, T. Matsuda, A. Ishikawa, T. Uglov, J. Haba, P. Križan, J. Libby, C. H. Li, Y. Seino, D. Cinabro, Marko Petrič, G. Inguglia, V. Zhukova, A. Garmash, Peter Kodys, W. W. Jacobs, K. Kinoshita, G. Varner, G. Bonvicini, B. G. Cheon, D. Matvienko, W. S. Hou, T. Nanut, S. Di Carlo, T. Iijima, K. Hayasaka, V. Vorobyev, Y. J. Kwon, D. M. Asner, D. Y. Kim, H. Farhat, A. Vinokurova, Samo Korpar, Leo Piilonen, K. Negishi, S. L. Olsen, Dipanwita Dutta, S. Uno, T. Kuhr, J. G. Shiu, Meng Wang, K. Senyo, K. K. Joo, E. Won, J. Yamaoka, A. Zupanc, Z. P. Zhang, S. Nishida, O. Seon, M. Masuda, Frank Simon, O. Schneider, D. Liventsev, K. T. Kim, R. Itoh, S. H. Kim, N. Dash, T. Ferber, Ruslan Chistov, Ihn Sik Seong, B. Pal, S. D. Yang, G. Pakhlova, Y. Watanabe, M. Uchida, K. H. Kang, K. Cho, Hiroaki Aihara, T. Sumiyoshi, V. Chobanova, Andrey Sokolov, T. A. Shibata, V. Bhardwaj, S. Ogawa, D. Kotchetkov, C. Z. Yuan, S. K. Choi, Prafulla Kumar Behera, F. Tenchini, Jyoti Prakash Biswal, Y. Sakai, E. Barberio, Vladimir Zhulanov, H. K. Moon, M. Starič, Martin Ritter, M. E. Sevior, P. Goldenzweig, T. Sanuki, Yongsun Kim, C. Schwanda, T. Luo, J. S. Lange, James E. Fast, C. Pulvermacher, S. Sandilya, V. Gaur, Yoshinobu Unno, Y. Yook, T. Schlüter, K. Trabelsi, Semen Eidelman, M. Watanabe, B. G. Fulsom, M. Nakao, C. P. Shen, V.N. Zhilich, S. Yashchenko, H. Hayashii, E. Solovieva, C. H. Wang, T. E. Browder, T. Julius, K. Chilikin, M. Nayak, H. Li, A.E. Bondar, L. Li Gioi, K. M. Williams, A. Chen, M. Takizawa, Kiyoshi Tanida, Mikhail Danilov, Y. Choi, Z. Doležal, X. L. Wang, R. Pestotnik, Z. Drásal, P. Krokovny, J. Dalseno, A. Bozek, Y. Ban, Y. Yusa, I. Badhrees, Yang Li, K. J. Nath, L. Santelj, M. Bračko, G. Schnell, N. Gabyshev, Z. Natkaniec, Liangbin Li, A. Rostomyan, V. Chekelian, D. Červenkov, B. Bhuyan, V. Savinov, P. Pakhlov, and A. Kuzmin
Subjects: Nuclear physics, Physics, Particle physics, KEKB, 010308 nuclear & particles physics, Electron–positron annihilation, 0103 physical sciences, High Energy Physics::Experiment, Tetraquark, 010306 general physics, 01 natural sciences
Abstract: The branching fractions of the Upsilon(1S) inclusive decays into final states with a J/psi or psi(2S) are measured with improved precision to be B Upsilon(1S) -> J/psi + anything = (5.25 +/- 0.13(stat) +/- 0.25(syst) x 10(-4) and B Upsilon(1S) -> psi(2S) + anything = (1.23 +/- 0.17(stat) +/- 0.11(syst)) x 10(-4). The first search for Upsilon(1S) decays into XYZ states that decay into a J/psi or a psi(2S) plus one or two charged tracks yields no significant signals for XYZ states in any of the examined decay modes, and upper limits on their production rates in Upsilon(1S) inclusive decays are determined.
Published: 2016
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47. Search for the decayB0→ϕγ

Author: T. Nanut, T. A. Shibata, H. Miyata, Prafulla Kumar Behera, Y. Sakai, S. Ogawa, B. Bhuyan, T. Aushev, S.I. Eidelman, T. Uglov, Yuki Sato, M. Sumihama, T. E. Browder, T. Matsuda, I. Adachi, K. Hayasaka, M. Takizawa, T. Ferber, A. Bobrov, A. Zupanc, V. Savinov, Martin Ritter, Z. Doležal, D. Cinabro, T. Sanuki, M. Masuda, J. B. Kim, T. Iijima, L. Pesántez, E. Solovieva, S. Nishida, L. E. Piilonen, H. B. Jeon, H. Farhat, H. Sahoo, S. H. Kim, P. Krokovny, Y. Iwasaki, N. Dash, B.A. Shwartz, Liangbin Li, A. Ishikawa, Marko Petrič, A. Rostomyan, A. Moll, M. Watanabe, G. Schnell, T. Kuhr, G. Inguglia, V. Bhardwaj, V. Chekelian, K. H. Kang, K. Cho, S. Yashchenko, V.E. Shebalin, C. W. Park, W. S. Hou, P. Križan, Z. P. Zhang, B. G. Cheon, B. Pal, Tsuyoshi Horiguchi, T. Julius, O. Schneider, N. Taniguchi, Peter Kodys, W. W. Jacobs, M. Z. Wang, K. Kinoshita, K. T. Kim, R. Mizuk, S. Al Said, V. Vorobyev, D. Matvienko, M. E. Sevior, I. S. Lee, J. Haba, T. Schlüter, S. Wehle, R. Gillard, P. Goldenzweig, T. K. Pedlar, V.N. Zhilich, Yongsun Kim, Ruslan Chistov, W. Ostrowicz, K. Trabelsi, S. Sandilya, Samo Stanič, Hiroaki Aihara, J. Stypula, S. Uno, D. M. Asner, C. Schwanda, Z. King, C. P. Shen, S. Korpar, K. Negishi, Jyoti Prakash Biswal, Y. Yook, C. Z. Yuan, Y. Watanabe, H. Li, C. H. Wang, J. G. Shiu, B. Golob, V. Gaur, J. Libby, C. H. Li, Phillip Urquijo, J. Yamaoka, M. Nakao, K. Miyabayashi, R. Glattauer, C. L. Hsu, Sunmin Ryu, C. Kiesling, Yoshinobu Unno, K. K. Joo, E. Won, C. Pulvermacher, M. Starič, H. Atmacan, Y. Seino, J. F. Strube, T. Kumita, P. Vanhoefer, H. Hayashii, Kevin Varvell, T. Kawasaki, J. Rauch, S. Okuno, R. Ayad, A. M. Bakich, Frank Simon, K. Chilikin, M. Uchida, K. Inami, V. Chobanova, D. Kotchetkov, Y. Usov, N. Gabyshev, D. Červenkov, Y. Teramoto, G. S. Varner, T. Luo, R. Itoh, H. Nakazawa, P. Wang, B. G. Fulsom, D. Y. Kim, A. J. Schwartz, H. J. Kim, K. Senyo, Dipanwita Dutta, R. Pestotnik, K. M. Williams, L. Li Gioi, A. Garmash, A. Bozek, Yang Li, Y. Choi, K. J. Nath, T. Hara, L. Santelj, Y. M. Goh, J. Dalseno, Soumen Paul, E. Kato, and G. B. Mohanty
Subjects: Physics, Particle physics, 010308 nuclear & particles physics, Branching fraction, Electron–positron annihilation, Resonance, Astrophysics, 01 natural sciences, 3. Good health, law.invention, KEKB, law, 0103 physical sciences, High Energy Physics::Experiment, 010306 general physics, Collider, Bar (unit)
Abstract: We have searched for the decay B-0 -> phi gamma sing the full Belle data set of 772 x 10(6) B (B) over bar pairs collected at the gamma(4S) resonance with the Belle detector at the KEKB e(+)e(-) collider. No signal is observed, and we set an upper limit on the branching fraction of B(B-0 -> phi gamma) < 1.0 x 10(-7) at the 90% confidence level. This is the most stringent limit on this decay mode to date.
Published: 2016
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48. Observation of the DecayBs0→K0K¯0

Author: B. Bhuyan, R. Mussa, Marko Petrič, H. B. Jeon, A. Ishikawa, Yuki Sato, A. Drutskoy, T. E. Browder, C. W. Park, D. Matvienko, P. Križan, D. Cinabro, I. Adachi, S. Sandilya, A. Bobrov, K. Trabelsi, D. M. Asner, A. Vinokurova, S. H. Kim, P. Krokovny, Rakesh Kumar, V. Savinov, K. H. Kang, K. Cho, B. G. Cheon, T. K. Pedlar, V. Babu, Tariq Aziz, T. Aushev, Ihn Sik Seong, T. Kawasaki, A. Zupanc, R. Pestotnik, A. Kuzmin, H. K. Moon, V.N. Zhilich, B. Pal, M. Uchida, L. Pesántez, Peter Kodys, W. W. Jacobs, G. Pakhlova, Z. Drásal, P. Pakhlov, A. Moll, J. Haba, X. H. He, S. Ogawa, Y. Choi, P.A. Lukin, V. Chobanova, Hiroaki Aihara, J. Stypula, C. Pulvermacher, C. Z. Yuan, N. K. Nisar, T. Hara, H. Park, S. Korpar, G. S. Varner, T. Luo, M. J. Kim, K. Miyabayashi, T. Kuhr, A. Bozek, M. Masuda, S. Okuno, B.A. Shwartz, Y. M. Goh, I. Jaegle, Jyoti Prakash Biswal, Sunmin Ryu, M. Starič, R. Ayad, J. Yamaoka, L. Li Gioi, Seema Bahinipati, L. E. Piilonen, E. Ribežl, A. Garmash, K. K. Joo, E. Won, M. N. Wagner, S. Nishida, B. G. Fulsom, T. Kumita, Liangbin Li, A. Rostomyan, V. Chekelian, T. Julius, G. Schnell, S. Uehara, D. Y. Kim, A. J. Schwartz, H. J. Kim, K. M. Williams, R. Chistov, D. Liventsev, Vladimir Zhulanov, A. Chen, P. Vanhoefer, J. G. Shiu, G. B. Mohanty, Samo Stanič, Y. Teramoto, V.E. Shebalin, H. Hayashii, H. Sahoo, T. Nanut, T. A. Shibata, H. Miyata, Prafulla Kumar Behera, I. S. Lee, S.I. Eidelman, Phillip Urquijo, J. Rauch, K. Senyo, E. Nakano, P. Goldenzweig, A. M. Bakich, Z. Natkaniec, T. Sumiyoshi, W. S. Hou, R. Mizuk, Y. Yusa, C. Van Hulse, Martin Ritter, K. Hayasaka, A. Abdesselam, V. Gaur, H. Farhat, J. Libby, D. Červenkov, C. H. Li, T. Sanuki, John Yelton, Y. Iwasaki, Z. Doležal, X. L. Wang, Y. J. Kwon, Andrey Sokolov, T. Schlüter, M. Watanabe, Dipanwita Dutta, D. Joffe, K. T. Kim, K. Inami, R. Gillard, Saraju P. Mohanty, O. Schneider, C. Kiesling, Y. S. Sohn, Y. Seino, M. Z. Wang, K. Kinoshita, U. Tamponi, S. Uno, C. Schwanda, M. Nayak, M. Nakao, I. Badhrees, H. Li, James E. Fast, M. Sumihama, O. Grzymkowska, C. H. Wang, J. Dalseno, Soumen Paul, E. Kato, E. L. Barberio, Y. Watanabe, T. Mori, D. Greenwald, Y. Usov, Z. P. Zhang, T. Uglov, Y. Sakai, E. Solovieva, A. Vossen, O. Seon, Frank Simon, N. Dash, V. Bhardwaj, and M. Bračko
Subjects: Physics, Particle physics, Luminosity (scattering theory), 010308 nuclear & particles physics, Branching fraction, Electron–positron annihilation, Detector, General Physics and Astronomy, Resonance, 01 natural sciences, Measure (mathematics), law.invention, Nuclear physics, KEKB, law, 0103 physical sciences, 010306 general physics, Collider
Abstract: We measure the decay Bs0→K0K0 using data collected at the ?(5S) resonance with the Belle detector at the KEKB e+e- collider. The data sample used corresponds to an integrated luminosity of 121.4 fb-1. We measure a branching fraction B(Bs0→K0K0)=[19.6-5.1+5.8(stat)±1.0(syst)±2.0(NBs0Bs0)]×10-6 with a significance of 5.1 standard deviations. This measurement constitutes the first observation of this decay.
Published: 2016
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49. Inclusive and exclusive measurements ofBdecays toχc1andχc2at Belle

Author: A. Abdesselam, H. Ye, V. Gaur, M. Nakao, B. G. Cheon, Andrey Sokolov, J. G. Shiu, A. Bala, Phillip Urquijo, M. Ritter, S. Korpar, M. J. Kim, L. E. Piilonen, D. Cinabro, V.N. Zhilich, Peter Kodys, P. Katrenko, M. Starič, C. H. Wang, C. Kiesling, D. Greenwald, Y. Usov, T. Kumita, M. Nayak, V.E. Shebalin, S. Al Said, B.A. Shwartz, A. Moll, Mikhail Danilov, M. Bračko, A.E. Bondar, S. Yashchenko, G. Pakhlova, H. Sahoo, S. Wehle, K. Trabelsi, K. Miyabayashi, T. Julius, K. Arinstein, A. Vinokurova, C. P. Shen, D. Liventsev, Z. P. Zhang, Y. Iwasaki, Y. J. Kwon, Saraju P. Mohanty, Vladimir Zhulanov, Kiyoshi Tanida, M. E. Sevior, I. S. Lee, I. Adachi, T. A. Shibata, H. Miyata, S.I. Eidelman, S. H. Kim, P. Krokovny, James E. Fast, P. Goldenzweig, Rakesh Kumar, O. Schneider, K. Cho, I. Jaegle, K. Hayasaka, Z. Doležal, X. L. Wang, V. Babu, H. Farhat, Yongsun Kim, S. Uno, C. Schwanda, Yoshinobu Unno, E. Panzenböck, M. Watanabe, T. Nanut, R. Pestotnik, G. Schnell, S. Sandilya, T. Sumiyoshi, B. R. Ko, Marko Petrič, T. K. Pedlar, O. Seon, Frank Simon, R. Mizuk, T. Ferber, J. Haba, L. Li Gioi, A. Garmash, T. Aushev, M. Masuda, A. Frey, Nagao Kobayashi, T. Sanuki, Y. S. Sohn, T. Iijima, D. Semmler, Y. Yook, A. Loos, K. Senyo, Vikas Bansal, Y. Sakai, K. T. Kim, Y. Watanabe, J. Rauch, D. Matvienko, P.A. Lukin, R. Gillard, S. K. Choi, A. M. Bakich, Z. Natkaniec, H. Park, A. Bozek, E. Nakano, C. Pulvermacher, T. Uglov, T. Kuhr, A. Chen, N. Gabyshev, D. Červenkov, D. M. Asner, J. Libby, H. Hayashii, C. H. Li, E. Solovieva, C. Van Hulse, S. Nishida, R. Glattauer, A. Kuzmin, Ruslan Chistov, J. Yamaoka, Jasvinder A. Singh, V.M. Aulchenko, S. Ogawa, Dipanwita Dutta, A. Rostomyan, E. L. Barberio, V. Chekelian, R. Ayad, Seema Bahinipati, Y. Seino, A. Zupanc, M. Sumihama, S. Uehara, K. Chilikin, B. Bhuyan, Yuki Sato, S. Okuno, T. E. Browder, B. Pal, E. Ribežl, X. H. He, D. Y. Kim, A. Bobrov, R. Mussa, Hiroaki Aihara, J. Stypula, V. Savinov, C. Z. Yuan, K. Inami, A. Ishikawa, Y. Teramoto, C. W. Park, P. Križan, M. Z. Wang, K. Kinoshita, U. Tamponi, J. B. Kim, P. Hamer, G. B. Mohanty, Y. Yusa, D. Joffe, I. Badhrees, M. Uchida, Yang Li, Y. Choi, N. K. Nisar, L. Santelj, V. Chobanova, V. Bhardwaj, Y. M. Goh, J. Dalseno, G. S. Varner, K. K. Joo, E. Won, E. Kato, H. Atmacan, R. Itoh, P. Vanhoefer, P. Wang, B. G. Fulsom, O. Frost, W. S. Hou, M. V. Purohit, T. Kawasaki, V. Vorobyev, B. Golob, H. K. Moon, S. Ganguly, and Jyoti Prakash Biswal
Subjects: Physics, Nuclear magnetic resonance, KEKB, 010308 nuclear & particles physics, Electron–positron annihilation, 0103 physical sciences, Analytical chemistry, Pi, 010306 general physics, 01 natural sciences, X(3872)
Abstract: We report inclusive and exclusive measurements for chi(c1) and chi(c2) production in B decays. We measure B(B -> chi X-c1) = (3.03 +/- 0.05 (stat) +/- 0.24(syst)) x 10(-3) and B(B -> chi X-c2) = (0.70 +/- 0.06 (stat) +/- 0.10(syst)) x 10(-3). For the first time, chi(c2) production in exclusive B decays in the modes B-0 -> chi(c2) pi K--(+) and B-0 -> chi(c2) pi(-)pi K-+(+) has been observed, along with first evidence for the B-0 -> chi(c2) pi K--(s)0 decay mode. For chi c1 production, we report the first observation in the B+ -> chi(c1) pi(-)pi K-+(+), B-0 -> chi(c1) pi(-)pi K-+(s)0 and B-0 -> chi(c1) pi(-)pi K-+(+) decay modes. Using these decay modes, we observe a difference in the production mechanism of chi(c2) in comparison to chi(c1) in B decays. In addition, we report searches for X(3872) and chi(c1) (2P) in the B+ -> (chi(c1) pi(+)pi(-))K+ decay mode. The reported results use 772 x 10(6) B (B) over bar events collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider.
Published: 2016
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50. Search for the rare decayD0→γγat Belle

Author: K. M. Williams, A. Chen, T. A. Shibata, J. G. Shiu, H. Miyata, Prafulla Kumar Behera, H. Hayashii, T. Nanut, S.I. Eidelman, P. Pakhlov, Phillip Urquijo, A. Zupanc, T. Kuhr, Z. Drásal, Tariq Aziz, K. Hayasaka, M. Z. Wang, K. Kinoshita, U. Tamponi, B. Pal, X. H. He, R. Ayad, Seema Bahinipati, Y. Choi, M. Niiyama, L. Pesántez, H. Park, W. S. Hou, A. Bozek, N. K. Nisar, T. Hara, Hiroaki Aihara, J. Stypula, D. Y. Kim, A. Kuzmin, P.A. Lukin, M. J. Kim, M. Masuda, C. Z. Yuan, M. Starič, S. Ogawa, Y. M. Goh, Y. Sakai, C. Pulvermacher, T. Kumita, B. G. Cheon, Yuki Sato, T. E. Browder, Y. Watanabe, Ihn Sik Seong, A. Bobrov, K. Inami, V. Savinov, S. Nishida, Liangbin Li, A. Rostomyan, V. Chekelian, S. Korpar, S. Sandilya, R. Pestotnik, B. Golob, H. K. Moon, J. S. Lange, V.M. Aulchenko, G. B. Mohanty, R. Mizuk, Y. Yusa, D. Joffe, T. Uglov, I. Badhrees, J. Dalseno, Soumen Paul, V.E. Shebalin, T. Kawasaki, M. Uchida, V. Chobanova, G. S. Varner, James E. Fast, M. N. Wagner, B. G. Fulsom, H. Sahoo, R. Mussa, H. B. Jeon, Y. Iwasaki, Y. J. Kwon, A. Ishikawa, O. Schneider, C. W. Park, P. Križan, A. J. Schwartz, H. J. Kim, V.N. Zhilich, E. Solovieva, Peter Kodys, W. W. Jacobs, H. Li, T. K. Pedlar, E. L. Barberio, Sunmin Ryu, K. K. Joo, E. Won, E. Kato, A. Vossen, O. Seon, Frank Simon, N. Dash, V. Bhardwaj, Jyoti Prakash Biswal, P. Vanhoefer, A. Vinokurova, Marko Petrič, S. H. Kim, P. Krokovny, Rakesh Kumar, K. H. Kang, K. Cho, M. Sumihama, K. Miyabayashi, Saraju P. Mohanty, D. Matvienko, F. Breibeck, A. Abdesselam, S. Uno, C. Schwanda, V. Gaur, H. Farhat, M. Nakao, D. M. Asner, Z. P. Zhang, L. E. Piilonen, Kevin Varvell, T. Mori, D. Greenwald, T. Julius, R. Chistov, T. Sumiyoshi, Martin Ritter, T. Sanuki, J. Libby, Y. Seino, A. Garmash, T. Aushev, J. Haba, John Yelton, Z. Doležal, X. L. Wang, K. T. Kim, B.A. Shwartz, A. Moll, R. Gillard, D. Cinabro, M. Watanabe, D. Liventsev, Vladimir Zhulanov, I. S. Lee, I. Adachi, I. Jaegle, P. Goldenzweig, O. Grzymkowska, C. H. Wang, C. Kiesling, K. Senyo, G. Pakhlova, E. Nakano, C. Van Hulse, K. Prasanth, M. Bračko, Jasvinder A. Singh, T. Schlüter, Dipanwita Dutta, M. Nayak, L. Li Gioi, G. Schnell, Samo Stanič, S. Okuno, J. Rauch, E. Ribežl, Z. Natkaniec, Y. Teramoto, D. Červenkov, A. Drutskoy, K. Trabelsi, V. Babu, and Y. S. Sohn
Subjects: Physics, Particle physics, 010308 nuclear & particles physics, Branching fraction, Astrophysics::High Energy Astrophysical Phenomena, Electron–positron annihilation, Radiative decay, 01 natural sciences, Confidence interval, 3. Good health, Luminosity, law.invention, KEKB, law, 0103 physical sciences, High Energy Physics::Experiment, Limit (mathematics), Atomic physics, 010306 general physics, Collider
Abstract: We search for the rare radiative decay D-0 -> gamma gamma using a data sample with an integrated luminosity of 832 fb(-1) recorded by the Belle detector at the KEKB e(+)e(-) asymmetric-energy collider. We find no statistically significant signal and set an upper limit on the branching fraction of B(D-0 -> gamma gamma) < 8.5 x 10(-7) at 90% confidence level. This is the most restrictive limit on the decay channel to date.
Published: 2016
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