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4 results on '"chi/c2(3555)"'

1. Observation of the Radiative Decays of ϒ(1S) to χ_{c1}

Author

Belle Collaboration, Katrenko, P., Adachi, I., Aihara, H., Al Said, S., Asner, D. M., Aushev, T., Badhrees, I., Bahinipati, S., Behera, P., Beleño, C., Bennett, J., Bhardwaj, V., Bhuyan, B., Biswal, J., Bobrov, A., Bonvicini, G., Bračko, M., Campajola, M., Cao, L., Červenkov, D., Chekelian, V., Chen, A., Cheon, B. G., Chilikin, K., Cho, H. E., Cho, K., Choi, S.-K., Choi, Y., Choudhury, S., Cinabro, D., Cunliffe, S., Di Capua, F., Di Carlo, S., Doležal, Z., Dong, T. V., Eidelman, S., Epifanov, D., Fast, J. E., Fulsom, B. G., Garg, R., Gaur, V., Gabyshev, N., Garmash, A., Giri, A., Goldenzweig, P., Golob, B., Grzymkowska, O., Hartbrich, O., Hayasaka, K., Hayashii, H., Hou, W.-S., Iijima, T., Inami, K., Ishikawa, A., Itoh, R., Iwasaki, M., Iwasaki, Y., Jacobs, W. W., Jeon, H. B., Jia, S., Jin, Y., Joffe, D., Joo, K. K., Karyan, G., Kichimi, H., Kim, D. Y., Kim, K. T., Kim, S. H., Kinoshita, K., Kodyš, P., Korpar, S., Križan, P., Kroeger, R., Kuhr, T., Lee, I. S., Lee, S. C., Lewis, P., Li, Y. B., Li Gioi, L., Libby, J., Lieret, K., MacQueen, C., Masuda, M., Matsuda, T., Matvienko, D., Merola, M., Miyabayashi, K., Miyata, H., Mizuk, R., Mohanty, G. B., Moon, T. J., Mori, T., Mussa, R., Nakano, E., Nakano, T., Nakao, M., Nayak, M., Nisar, N. K., Nishida, S., Nishimura, K., Ono, H., Onuki, Y., Oskin, P., Pakhlov, P., Pakhlova, G., Pang, T., Pardi, S., Park, C. W., Park, H., Park, S.-H., Paul, S., Pedlar, T. K., Pestotnik, R., Piilonen, L. E., Popov, V., Prencipe, E., Prim, M. T., Ritter, M., Rostomyan, A., Rout, N., Russo, G., Sahoo, D., Sakai, Y., Sandilya, S., Sanuki, T., Savinov, V., Schneider, O., Schnell, G., Schueler, J., Schwanda, C., Seino, Y., Senyo, K., Sevior, M. E., Shen, C. P., Shiu, J.-G., Solovieva, E., Starič, M., Stottler, Z. S., Sumiyoshi, T., Sutcliffe, W., Takizawa, M., Tamponi, U., Tanida, K., Tenchini, F., Trabelsi, K., Uchida, M., Uehara, S., Uglov, T., Unno, Y., Uno, S., Urquijo, P., Usov, Y., Van Tonder, R., Varner, G., Vossen, A., Wang, B., Wang, C. H., Wang, M.-Z., Wang, P., Wang, X. L., Won, E., Yang, S. B., Ye, H., Yelton, J., Yin, J. H., Yuan, C. Z., Yusa, Y., Zhang, Z. P., Zhilich, V., and Zhukova, V.

Subjects
+chi%2Fc1%283510%29+photon%22">Upsilon(9460) --> chi/c1(3510) photon, charm [chi mesons], electroproduction [chi/c1(3510)], charmonium, radiative decay [Upsilon(9460)], Physics, +chi%2Fc2%283555%29+photon%22">Upsilon(9460) --> chi/c2(3555) photon, BELLE, annihilation [electron positron], branching ratio: upper limit [Upsilon(9460)], Upsilon(10020), chi/c2(3555), KEK-B, +chi%2Fc0%283415%29+photon%22">Upsilon(9460) --> chi/c0(3415) photon, +eta%2Fc%282980%29+photon%22">Upsilon(9460) --> eta/c(2980) photon, colliding beams [electron positron], ddc:530, chi/c0(3415), eta/c(2980), branching ratio: calculated [Upsilon(9460)], statistical, experimental results
Abstract

We report the first observation of the radiative decay of the ϒ(1S) into a charmonium state. The significance of the observed signal of ϒ(1S)→γχ_{c1} is 6.3 standard deviations including systematics. The branching fraction is calculated to be B[ϒ(1S)→γχ_{c1}]=[4.7_{-1.8}^{+2.4}(stat)_{-0.5}^{+0.4}(sys)×10^{-5}]. We also searched for ϒ(1S) radiative decays into χ_{c0,2} and η_{c}(1S,2S), and set upper limits on their branching fractions. These results are obtained from a 24.9 fb^{-1} data sample collected with the Belle detector at the KEKB asymmetric-energy e^{+}e^{-} collider at a center-of-mass energy equal to the ϒ(2S) mass using ϒ(1S) tagging by the ϒ(2S)→ϒ(1S)π^{+}π^{-} transitions.

Published
2020
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2. Observation of $e^+e^- \to \gamma \chi_{c1}$ and search for $e^+e^- \to \gamma \chi_{c0}, \gamma \chi_{c2},$ and $\gamma\eta_c$ at $\sqrt{s}$ near 10.6 GeV at Belle

Author

Jia, S., Wang, X. L., Aushev, T., Li Gioi, L., Libby, J., Liptak, Z., Liventsev, D., Lu, P.-C., Lubej, M., MacNaughton, J., Masuda, M., Matsuda, T., Matvienko, D., Ayad, R., Merola, M., Miyata, H., Mizuk, R., Mori, T., Mussa, R., Nakano, E., Nakao, M., Nath, K. J., Nayak, M., Nisar, N. K., Babu, V., Nishida, S., Ogawa, S., Olsen, S. L., Ono, H., Onuki, Y., Ostrowicz, W., Pakhlova, G., Pal, B., Pardi, S., Paul, S., Bansal, V., Pedlar, T. K., Pestotnik, R., Piilonen, L. E., Popov, V., Prencipe, E., Ritter, M., Rostomyan, A., Russo, G., Sakai, Y., Salehi, M., Behera, P., Sandilya, S., Santelj, L., Sanuki, T., Savinov, V., Schneider, O., Schnell, G., Schueler, J., Schwanda, C., Seino, Y., Senyo, K., Beleño, C., Sevior, M. E., Shibata, T.-A., Shiu, J.-G., Simon, F., Sokolov, A., Solovieva, E., Starič, M., Stottler, Z. S., Strube, J. F., Sumiyoshi, T., Berger, M., Sutcliffe, W., Takizawa, M., Tanida, K., Tao, Y., Tenchini, F., Uchida, M., Uehara, S., Uglov, T., Unno, Y., Uno, S., Bhuyan, B., Urquijo, P., Usov, Y., Van Tonder, R., Varner, G., Varvell, K. E., Vorobyev, V., Waheed, E., Wang, B., Wang, C. H., Wang, M.-Z., Bilka, T., Wang, P., Watanuki, S., Widmann, E., Won, E., Yamamoto, H., Yang, S. B., Ye, H., Yin, J. H., Yusa, Y., Zhang, Z. P., Biswal, J., Zhilich, V., Zhukova, V., Zhulanov, V., Belle Collaboration, Shen, C. P., Bobrov, A., Bozek, A., Bračko, M., Browder, T. E., Cao, L., Červenkov, D., Chang, P., Chekelian, V., Chen, A., Cheon, B. G., Yuan, C. Z., Chilikin, K., Cho, K., Choi, S.-K., Choi, Y., Choudhury, S., Cinabro, D., Cunliffe, S., Dash, N., Di Carlo, S., Doležal, Z., Adachi, I., Dong, T. V., Eidelman, S., Epifanov, D., Fast, J. E., Ferber, T., Frey, A., Fulsom, B. G., Garg, R., Gaur, V., Gabyshev, N., Aihara, H., Garmash, A., Gelb, M., Giri, A., Goldenzweig, P., Greenwald, D., Haba, J., Hayasaka, K., Hayashii, H., Hou, W.-S., Hsu, C.-L., Al Said, S., Iijima, T., Inami, K., Inguglia, G., Ishikawa, A., Itoh, R., Iwasaki, M., Iwasaki, Y., Jacobs, W. W., Jin, Y., Joffe, D., Asner, D. M., Kahn, J., Kaliyar, A. B., Karyan, G., Kawasaki, T., Kichimi, H., Kiesling, C., Kim, D. Y., Kim, H. J., Kim, J. B., Kim, S. H., Atmacan, H., Kinoshita, K., Kodyš, P., Korpar, S., Kotchetkov, D., Križan, P., Kroeger, R., Krokovny, P., Kuhr, T., Kulasiri, R., Kumar, R., Aulchenko, V., Kuzmin, A., Kwon, Y.-J., Lalwani, K., Lange, J. S., Lee, I. S., Lee, J. Y., Lee, S. C., Li, C. H., Li, L. K., Li, Y. B., Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Belle, and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)

Subjects
Born approximation, exclusive reaction, measured [channel cross section], photon: spectrum, BELLE, annihilation [electron positron], electron positron: annihilation, 10.58 GeV-cms, +photon+chi%2Fc0%283415%29%22">electron positron --> photon chi/c0(3415), channel cross section: upper limit, chi/c1(3510), High Energy Physics - Experiment, energy dependence, chi/c2(3555), KEK-B, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], tree approximation, Particle Physics Experiments, ddc:530, +photon+chi%2Fc1%283510%29%22">electron positron --> photon chi/c1(3510), chi/c0(3415), +photon+chi%2Fc2%283555%29%22">electron positron --> photon chi/c2(3555), BES, upper limit [channel cross section], electron positron: colliding beams, spectrum [photon], High Energy Physics - Phenomenology, [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], colliding beams [electron positron], channel cross section: measured, experimental results
Abstract

Using data samples of 89.5~fb$^{-1}$, 711.0~fb$^{-1}$, and 121.4~fb$^{-1}$ collected with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider at center-of-mass energies 10.52 GeV, 10.58 GeV, and 10.867 GeV, respectively, we study the exclusive reactions $e^+e^-\to\gamma\chi_{cJ}$ ($J = 0,~1,~2$) and $e^+e^-\to\gamma\eta_c$. A significant $\gamma \chi_{c1}$ signal is observed for the first time at $\sqrt{s}=10.58$ GeV with a significance of $5.1\sigma$ including systematic uncertainties. No significant excesses for $\gamma \chi_{c0}$, $\gamma \chi_{c2}$, and $\gamma \eta_c$ final states are found, and we set 90\% credibility level upper limits on the Born cross sections ($\sigma_{\rm B}$) at 10.52 GeV, 10.58 GeV, and 10.867~GeV. Together with cross sections measured by BESIII at lower center-of-mass energies, the energy dependency of $\sigma_{\rm B}(e^+e^-\to\gamma\chi_{c1})$ is obtained., Comment: 8 pages, 4 figures

Published
2018
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3. Observation of $e^+e^- \to \gamma \chi_{c1}$ and search for $e^+e^- \to \gamma \chi_{c0}, \gamma \chi_{c2},$ and $\gamma\eta_c$ at $\sqrt{s}$ near 10.6 GeV at Belle

Author

Jia, S., Wang, X. L., Shen, C. P., Yuan, C. Z., Adachi, I., Aihara, H., Al Said, S., Asner, D. M., Atmacan, H., Aulchenko, V., Aushev, T., Ayad, R., Babu, V., Bansal, V., Behera, P., Beleño, C., Berger, M., Bhuyan, B., Bilka, T., Biswal, J., Bobrov, A., Bozek, A., Bračko, M., Browder, T. E., Cao, L., Červenkov, D., Chang, P., Chekelian, V., Chen, A., Cheon, B. G., Chilikin, K., Cho, K., Choi, S.-K., Choi, Y., Choudhury, S., Cinabro, D., Cunliffe, S., Dash, N., Di Carlo, S., Doležal, Z., Dong, T. V., Eidelman, S., Epifanov, D., Fast, J. E., Ferber, T., Frey, A., Fulsom, B. G., Garg, R., Gaur, V., Gabyshev, N., Garmash, A., Gelb, M., Giri, A., Goldenzweig, P., Greenwald, D., Haba, J., Hayasaka, K., Hayashii, H., Hou, W.-S., Hsu, C.-L., Iijima, T., Inami, K., Inguglia, G., Ishikawa, A., Itoh, R., Iwasaki, M., Iwasaki, Y., Jacobs, W. W., Jin, Y., Joffe, D., Kahn, J., Kaliyar, A. B., Karyan, G., Kawasaki, T., Kichimi, H., Kiesling, C., Kim, D. Y., Kim, H. J., Kim, J. B., Kim, S. H., Kinoshita, K., Kodyš, P., Korpar, S., Kotchetkov, D., Križan, P., Kroeger, R., Krokovny, P., Kuhr, T., Kulasiri, R., Kumar, R., Kuzmin, A., Kwon, Y.-J., Lalwani, K., Lange, J. S., Lee, I. S., Lee, J. Y., Lee, S. C., Li, C. H., Li, L. K., Li, Y. B., Li Gioi, L., Libby, J., Liptak, Z., Liventsev, D., Lu, P.-C., Lubej, M., MacNaughton, J., Masuda, M., Matsuda, T., Matvienko, D., Merola, M., Miyata, H., Mizuk, R., Mori, T., Mussa, R., Nakano, E., Nakao, M., Nath, K. J., Nayak, M., Nisar, N. K., Nishida, S., Ogawa, S., Olsen, S. L., Ono, H., Onuki, Y., Ostrowicz, W., Pakhlova, G., Pal, B., Pardi, S., Paul, S., Pedlar, T. K., Pestotnik, R., Piilonen, L. E., Popov, V., Prencipe, E., Ritter, M., Rostomyan, A., Russo, G., Sakai, Y., Salehi, M., Sandilya, S., Santelj, L., Sanuki, T., Savinov, V., Schneider, O., Schnell, G., Schueler, J., Schwanda, C., Seino, Y., Senyo, K., Sevior, M. E., Shibata, T.-A., Shiu, J.-G., Simon, F., Sokolov, A., Solovieva, E., Starič, M., Stottler, Z. S., Strube, J. F., Sumiyoshi, T., Sutcliffe, W., Takizawa, M., Tanida, K., Tao, Y., Tenchini, F., Uchida, M., Uehara, S., Uglov, T., Unno, Y., Uno, S., Urquijo, P., Usov, Y., Van Tonder, R., Varner, G., Varvell, K. E., Vorobyev, V., Waheed, E., Wang, B., Wang, C. H., Wang, M.-Z., Wang, P., Watanuki, S., Widmann, E., Won, E., Yamamoto, H., Yang, S. B., Ye, H., Yin, J. H., Yusa, Y., Zhang, Z. P., Zhilich, V., Zhukova, V., and Zhulanov, V.

Subjects
Born approximation, exclusive reaction, BES, +photon+chi%2Fc2%283555%29%22">electron positron --> photon chi/c2(3555), photon: spectrum, BELLE, electron positron: colliding beams, electron positron: annihilation, +photon+chi%2Fc1%283510%29%22">electron positron --> photon chi/c1(3510), 10.58 GeV-cms, channel cross section: upper limit, chi/c1(3510), energy dependence, chi/c2(3555), KEK-B, +photon+chi%2Fc0%283415%29%22">electron positron --> photon chi/c0(3415), tree approximation, chi/c0(3415), channel cross section: measured, experimental results
Abstract

Using data samples of 89.5~fb$^{-1}$, 711.0~fb$^{-1}$, and 121.4~fb$^{-1}$ collected with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider at center-of-mass energies 10.52 GeV, 10.58 GeV, and 10.867 GeV, respectively, we study the exclusive reactions $e^+e^-\to\gamma\chi_{cJ}$ ($J = 0,~1,~2$) and $e^+e^-\to\gamma\eta_c$. A significant $\gamma \chi_{c1}$ signal is observed for the first time at $\sqrt{s}=10.58$ GeV with a significance of $5.1\sigma$ including systematic uncertainties. No significant excesses for $\gamma \chi_{c0}$, $\gamma \chi_{c2}$, and $\gamma \eta_c$ final states are found, and we set 90\% credibility level upper limits on the Born cross sections ($\sigma_{\rm B}$) at 10.52 GeV, 10.58 GeV, and 10.867~GeV. Together with cross sections measured by BESIII at lower center-of-mass energies, the energy dependency of $\sigma_{\rm B}(e^+e^-\to\gamma\chi_{c1})$ is obtained.

Published
2018
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4. Observation of the Radiative Decays of $ϒ ( 1 S )$ to $χ_ {c 1}$

Author

Katrenko, P., Adachi, I., Aihara, H., Al Said, S., Asner, D. M., Aushev, T., Badhrees, I., Bahinipati, S., Behera, P., Beleño, C., Bennett, J., Bhardwaj, V., Bhuyan, B., Biswal, J., Bobrov, A., Bonvicini, G., Bračko, M., Campajola, M., Cao, L., Červenkov, D., Chekelian, V., Chen, A., Cheon, B. G., Chilikin, K., Cho, H. E., Cho, K., Choi, S.-K., Choi, Y., Choudhury, S., Cinabro, D., Cunliffe, S., Di Capua, F., Di Carlo, S., Doležal, Z., Dong, T. V., Eidelman, S., Epifanov, D., Fast, J. E., Fulsom, B. G., Garg, R., Gaur, V., Gabyshev, N., Garmash, A., Giri, A., Goldenzweig, P., Golob, B., Grzymkowska, O., Hartbrich, O., Hayasaka, K., Hayashii, H., Hou, W.-S., Iijima, T., Inami, K., Ishikawa, A., Itoh, R., Iwasaki, M., Iwasaki, Y., Jacobs, W. W., Jeon, H. B., Jia, S., Jin, Y., Joffe, D., Joo, K. K., Karyan, G., Kichimi, H., Kim, D. Y., Kim, K. T., Kim, S. H., Kinoshita, K., Kodyš, P., Korpar, S., Kroeger, R., Kuhr, T., Lee, I. S., Lee, S. C., Lewis, P., Li, Y. B., Li Gioi, L., Libby, J., Lieret, K., MacQueen, C., Masuda, M., Matsuda, T., Matvienko, D., Merola, M., Miyabayashi, K., Miyata, H., Mizuk, R., Mohanty, G. B., Moon, T. J., Mori, T., Mussa, R., Nakano, E., Nakano, T., Nakao, M., Nayak, M., Nisar, N. K., Nishida, S., Nishimura, K., Ono, H., Onuki, Y., Oskin, P., Pakhlov, P., Pakhlova, G., Pang, T., Pardi, S., Park, C. W., Park, H., Park, S.-H., Paul, S., Pedlar, T. K., Pestotnik, R., Piilonen, L. E., Popov, V., Prencipe, E., Prim, M. T., Ritter, M., Rostomyan, A., Rout, N., Russo, G., Sahoo, D., Sakai, Y., Sandilya, S., Sanuki, T., Savinov, V., Schneider, O., Schnell, G., Schueler, J., Schwanda, C., Seino, Y., Senyo, K., Sevior, M. E., Shen, C. P., Shiu, J.-G., Solovieva, E., Starič, M., Stottler, Z. S., Sumiyoshi, T., Sutcliffe, W., Takizawa, M., Tamponi, U., Tanida, K., Tenchini, F., Trabelsi, K., Uchida, M., Uehara, S., Uglov, T., Unno, Y., Uno, S., Urquijo, P., Usov, Y., Van Tonder, R., Varner, G., Vossen, A., Wang, B., Wang, C. H., Wang, M.-Z., Wang, P., Wang, X. L., Won, E., Yang, S. B., Ye, H., Yelton, J., Yin, J. H., Yuan, C. Z., Yusa, Y., Zhang, Z. P., Zhilich, V., and Zhukova, V.

Subjects
+chi%2Fc2%283555%29+photon%22">Upsilon(9460) --> chi/c2(3555) photon, charmonium, BELLE, electron positron: colliding beams, electron positron: annihilation, Upsilon(9460): branching ratio: calculated, Upsilon(9460): branching ratio: upper limit, 3. Good health, Upsilon(10020), chi/c2(3555), KEK-B, +eta%2Fc%282980%29+photon%22">Upsilon(9460) --> eta/c(2980) photon, +chi%2Fc0%283415%29+photon%22">Upsilon(9460) --> chi/c0(3415) photon, chi mesons: charm, chi/c0(3415), chi/c1(3510): electroproduction, eta/c(2980), +chi%2Fc1%283510%29+photon%22">Upsilon(9460) --> chi/c1(3510) photon, statistical, Upsilon(9460): radiative decay, experimental results
Abstract

Physical review letters 124(12), 122001 (2020). doi:10.1103/PhysRevLett.124.122001, We report the first observation of the radiative decay of the Υ(1S) into a charmonium state. The significance of the observed signal of Υ(1S)→γχc1 is 6.3 standard deviations including systematics. The branching fraction is calculated to be B[Υ(1S)→γχc1]=[4.7+2.4−1.8(stat)+0.4−0.5(sys)×10−5]. We also searched for Υ(1S) radiative decays into χc0,2 and ηc(1S,2S), and set upper limits on their branching fractions. These results are obtained from a 24.9 fb−1 data sample collected with the Belle detector at the KEKB asymmetric-energy e+e− collider at a center-of-mass energy equal to the Υ(2S) mass using Υ(1S) tagging by the Υ(2S)→Υ(1S)π+π− transitions, Published by Cornell University, College Park, Md.

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