Search for Bs0 → hh decays at the Y5S resonance

C. C. Peng, P. Chang, I. Adachi, H. Aihara, T. Aushev, T. Aziz, A. M. Bakich, V. Balagura, E. Barberio, K. Belous, V. Bhardwaj, A. Bondar, A. Bozek, M. Bračko, T. E. Browder, M. C. Chang, Y. Chao, A. Chen, K. F. Chen, P. ChenB. G. Cheon, C. C. Chiang, R. Chistov, I. S. Cho, Y. Choi, J. Dalseno, M. Danilov, A. Das, M. Dash, A. Drutskoy, W. Dungel, S. Eidelman, N. Gabyshev, P. Goldenzweig, B. Golob, H. Ha, J. Haba, H. Hayashii, Y. Horii, Y. Hoshi, W. S. Hou, H. J. Hyun, T. Iijima, K. Inami, R. Itoh, M. Iwabuchi, M. Iwasaki, Y. Iwasaki, N. J. Joshi, T. Julius, J. H. Kang, T. Kawasaki, H. J. Kim, H. O. Kim, J. H. Kim, M. J. Kim, S. K. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, P. Kodyš, S. Korpar, P. Križan, P. Krokovny, T. Kuhr, Y. J. Kwon, S. H. Kyeong, M. J. Lee, S. H. Lee, J. Li, A. Limosani, C. Liu, D. Liventsev, R. Louvot, A. Matyja, S. McOnie, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Neubauer, S. Nishida, K. Nishimura, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, G. Pakhlova, C. W. Park, H. Park, H. K. Park, R. Pestotnik, M. Petrič, L. E. Piilonen, M. Röhrken, S. Ryu, Y. Sakai, O. Schneider, C. Schwanda, A. J. Schwartz, K. Senyo, M. E. Sevior, M. Shapkin, C. P. Shen, J. G. Shiu, B. Shwartz, P. Smerkol, A. Sokolov, M. Starič, K. Sumisawa, T. Sumiyoshi, M. Tanaka, G. N. Taylor, Y. Teramoto, K. Trabelsi, S. Uehara, Y. Unno, S. Uno, G. Varner, K. E. Varvell, K. Vervink, C. H. Wang, P. Wang, M. Watanabe, Y. Watanabe, R. Wedd, J. Wicht, Eunil Won, B. D. Yabsley, Y. Yamashita, C. Z. Yuan, C. C. Zhang, Z. P. Zhang, V. Zhilich, V. Zhulanov, T. Zivko, O. Zyukova

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We have searched for Bs0→hh decays, where h stands for a charged or neutral kaon, or a charged pion. These results are based on a 23.6fb-1 data sample collected with the Belle detector on the Υ(5S) resonance at the KEKB asymmetric-energy e+e- collider, containing 1.25×106 Bs(*)B̄s(*) events. We observe the decay Bs0→K +K- and measure its branching fraction, B(Bs0→K +K-)=[3.8-0.9+1.0(stat)±0.5(syst)±0.5(f s)]×10-5. The first error is statistical, the second is systematic, and the third error is due to the uncertainty in the Bs0 production fraction in e+e-→bb̄ events. No significant signals are seen in other decay modes, and we set upper limits at the 90% confidence level: B(Bs0→K-π+)<1.2×10-5, B(Bs0→π+π-)<2.6×10-5, and B(Bs0→K0K̄0) <6.6×10-5.

Original languageEnglish
Article number072007
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number7
Publication statusPublished - 2010 Oct 15

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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    Peng, C. C., Chang, P., Adachi, I., Aihara, H., Aushev, T., Aziz, T., Bakich, A. M., Balagura, V., Barberio, E., Belous, K., Bhardwaj, V., Bondar, A., Bozek, A., Bračko, M., Browder, T. E., Chang, M. C., Chao, Y., Chen, A., Chen, K. F., ... Zyukova, O. (2010). Search for Bs0 → hh decays at the Y5S resonance. Physical Review D - Particles, Fields, Gravitation and Cosmology, 82(7), [072007].