1. Search for $CP$ Violation and Measurement of the Branching Fraction in the Decay $D^{0} \to K^0_S K^0_S$
- Author
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Dash, N., Bahinipati, S., Ayad, R., Lubej, M., Luo, T., Masuda, M., Matvienko, D., Merola, M., Miyabayashi, K., Miyata, H., Mizuk, R., Mohanty, G. B., Mohanty, S., Babu, V., Moon, H. K., Mori, T., Mussa, R., Nakano, E., Nakao, M., Nanut, T., Nath, K. J., Natkaniec, Z., Nayak, M., Niiyama, M., Badhrees, I., Nisar, N. K., Nishida, S., Ogawa, S., Okuno, S., Ono, H., Pakhlov, P., Pakhlova, G., Pal, B., Pardi, S., Park, C.-S., Bakich, A. M., Park, H., Paul, S., Pedlar, T. K., Pesántez, L., Pestotnik, R., Piilonen, L. E., Prasanth, K., Ritter, M., Rostomyan, A., Sahoo, H., Bansal, V., Sakai, Y., Sandilya, S., Santelj, L., Sanuki, T., Sato, Y., Savinov, V., Schneider, O., Schnell, G., Schwanda, C., Schwartz, A. J., Barberio, E., Seino, Y., Senyo, K., Sevior, M. E., Shebalin, V., Shen, C. P., Shibata, T.-A., Shiu, J.-G., Shwartz, B., Simon, F., Sokolov, A., Bhuyan, B., Solovieva, E., Starič, M., Strube, J. F., Stypula, J., Sumisawa, K., Sumiyoshi, T., Takizawa, M., Tamponi, U., Tanida, K., Tenchini, F., Biswal, J., Uchida, M., Uglov, T., Unno, Y., Uno, S., Urquijo, P., Usov, Y., Van Hulse, C., Varner, G., Vorobyev, V., Vossen, A., Bobrov, A., Waheed, E., Wang, C. H., Wang, M.-Z., Wang, P., Watanabe, M., Watanabe, Y., Widmann, E., Williams, K. M., Won, E., Yamashita, Y., Bondar, A., Ye, Hua, Yelton, J., Yook, Y., Yuan, C. Z., Yusa, Y., Zhang, Z. P., Zhilich, V., Zhukova, V., Zhulanov, V., Zupanc, A., Bhardwaj, V., Bonvicini, G., Belle Collaboration, Bozek, A., Bračko, M., Breibeck, F., Browder, T. E., Červenkov, D., Chang, M.-C., Chekelian, V., Chen, A., Cheon, B. G., Trabelsi, K., Chilikin, K., Cho, K., Choi, Y., Cinabro, D., Di Carlo, S., Doležal, Z., Drásal, Z., Dutta, D., Eidelman, S., Epifanov, D., Adachi, I., Farhat, H., Fast, J. E., Ferber, T., Fulsom, B. G., Gaur, V., Gabyshev, N., Garmash, A., Gillard, R., Goldenzweig, P., Haba, J., Aihara, H., Hara, T., Hayasaka, K., Hayashii, H., Hedges, M. T., Hou, W.-S., Iijima, T., Inami, K., Ishikawa, A., Itoh, R., Iwasaki, Y., Al Said, S., Jacobs, W. W., Jaegle, I., Jeon, H. B., Jin, Y., Joffe, D., Joo, K. K., Julius, T., Kahn, J., Kaliyar, A. B., Karyan, G., Asner, D. M., Katrenko, P., Kawasaki, T., Kiesling, C., Kim, D. Y., Kim, H. J., Kim, J. B., Kim, K. T., Kim, M. J., Kim, S. H., Kim, Y. J., Aulchenko, V., Kinoshita, K., Kodyš, P., Korpar, S., Kotchetkov, D., Križan, P., Krokovny, P., Kuhr, T., Kulasiri, R., Kumar, R., Kumita, T., Aushev, T., Kuzmin, A., Kwon, Y.-J., Lange, J. S., Lee, I. S., Li, C. H., Li, L., Li, Y., Li Gioi, L., Libby, J., and Liventsev, D.
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FOS: Physical sciences ,BELLE ,annihilation [electron positron] ,CP [asymmetry] ,violation [CP] ,10.57 GeV-cms10.87 GeV-cms ,High Energy Physics - Experiment ,+2K0%28S%29%22">D0 --> 2K0(S) ,High Energy Physics - Experiment (hep-ex) ,electroproduction [Upsilon(10870)] ,KEK-B ,5/3 ,ddc:550 ,electroproduction [Upsilon(10570)] ,colliding beams [electron positron] ,pair production [K0(S)] ,branching ratio: measured [D0] ,statistical ,hadronic decay [D0] ,experimental results - Abstract
We report a study of the decay $D^0 \to K^0_S K^0_S$ using 921~fb$^{-1}$ of data collected at or near the $\Upsilon(4S)$ and $\Upsilon(5S)$ resonances with the Belle detector at the KEKB asymmetric energy $e^+e^-$ collider. The measured time-integrated $CP$ asymmetry is $ A_{CP}(D^0 \to K^0_S K^0_S) = (-0.02 \pm 1.53 \pm 0.02 \pm 0.17) \%$, and the branching fraction is $\mathcal{B} (D^{0}\rightarrow K_{S}^{0}K_{S}^{0})$ = (1.321 $\pm$ 0.023 $\pm$ 0.036 $\pm$ 0.044) $\times$ 10$^{-4}$, where the first uncertainty is statistical, the second is systematic, and the third is due to the normalization mode ($D^0 \to K_S^0 \pi^0$). These results are significantly more precise than previous measurements available for this mode. The $A_{CP}$ measurement is consistent with the standard model expectation., Comment: 7 pages,1 figure, Submitted to PRL
- Published
- 2017
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