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Improved measurements of the branching fractions for B → K π , ππ, and K K </mml:…

2004; American Physical Society; Volume: 69; Issue: 11 Linguagem: Inglês

10.1103/physrevd.69.111102

1550-7998

Y. Chao, K. Suzuki, Y. Unno, K. Abe, K. Abe, K. Abe, I. Adachi, H. Aihara, M. Akatsu, Y. Asano, T. Aso, V. Aulchenko, T. Aushev, A. M. Bakich, S. Banerjee, I. Bizjak, A. Bondar, A. Bożek, M. Bračko, T. E. Browder, P. Chang, B. G. Cheon, R. Chistov, S. K. Choi, Y. Choi, Y. Choi, A. Chuvikov, S. Cole, M. Danilov, M. Dash, L. Y. Dong, J. Dragic, A. Drutskoy, S. Eidelman, V. Eiges, N. Gabyshev, A. Garmash, T. Gershon, B. Golob, Ascelin Gordon, J. Haba, T. Hara, M. Hazumi, I. Higuchi, T. Hokuue, Y. Hoshi, W.-S. Hou, Y. Hsiung, Hsuan‐Cheng Huang, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, J. H. Kang, J. S. Kang, P. Kapusta, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, H. J. Kim, J. H. Kim, K. Kinoshita, S. Korpar, P. Križan, P. Krokovny, A. Kuzmin, Y.-J. Kwon, J. S. Lange, G. Leder, S. H. Lee, J. Li, A. Limosani, S.-W. Lin, J. MacNaughton, D. Majumder, F. Mandl, D. Marlow, T. Matsumoto, A. Matyja, W. Mitaroff, H. Miyake, H. Miyata, D. Mohapatra, T. Mori, T. Nagamine, Y. Nagasaka, T. Nakadaira, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, W. Ostrowicz, H. Ozaki, P. Pakhlov, H. Pałka, C. W. Park, H. Park, N. Parslow, L. S. Peak, L. E. Piilonen, M. Różańska, H. Sagawa, Saburou Saitoh, Y. Sakai, O. Schneider, J. Schümann, A. J. Schwartz, S. Semenov, M. E. Sevior, H. Shibuya, B. Shwartz, V. Sidorov, J. B. Singh, N. Soni, S. Stanič, M. Starič, K. Sumisawa, T. Sumiyoshi, S. Suzuki, S. Suzuki, O. Tajima, F. Takasaki, N. Tamura, M. Tanaka, Y. Teramoto, T. Tomura, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, S. Uehara, K. Ueno, T. Uglov, S. Uno, G. Varner, C. H. Wang, J. G. Wang, M.-Z. Wang, M. Watanabe, Y. Yamada, A. Yamaguchi, H. Yamamoto, Y. Yamashita, M. Yamauchi, H. Yanai, Heyoung Yang, J. Ying, Y. Yuan, S. L. Zang, J. Zhang, Z. P. Zhang, V. Zhilich, D. Žontar,

High-Energy Particle Collisions Research

We report improved measurements of branching fractions for $\stackrel{\ensuremath{\rightarrow}}{B}K\ensuremath{\pi},$ ${\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}},$ ${\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{0},$ and $K\overline{K}$ decays based on a data sample of 85.0 million $B\overline{B}$ pairs collected at the $\ensuremath{\Upsilon}(4S)$ resonance with the Belle detector at the KEKB ${e}^{+}{e}^{\ensuremath{-}}$ storage ring. This data sample is almost three times larger than the sample previously used. We observe clear signals for $\stackrel{\ensuremath{\rightarrow}}{B}K\ensuremath{\pi},$ ${\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}},$ and ${\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{0}$ decays and set upper limits on $\stackrel{\ensuremath{\rightarrow}}{B}K\overline{K}$ decays. The results can be used to give model-dependent constraints on the CKM angle ${\ensuremath{\varphi}}_{3},$ as well as limits on the hadronic uncertainty in the time-dependent analysis of the angle ${\ensuremath{\varphi}}_{2}.$