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Observation of B decays to two kaonsopen access
- Authors
- Lin, S.-W.; Chang, P.; Abe, K.; Abe, K.; Adachi, I.; Aihara, H.; Anipko, D.; Arinstein, K.; Aulchenko, V.; Aushev, T.; Aziz, T.; Bakich, A. M.; Barberio, E.; Bay, A.; Bedny, I.; Belous, K.; Bitenc, U.; Bizjak, I.; Blyth, S.; Bondar, A.; Bozek, A.; Bracko, M.; Chao, Y.; Chen, A.; Chen, K.-F.; Chen, W. T.; Cheon, Byung Gu; Chistov, R.; Choi, S.-K.; Choi, Y.; Choi, Y. K.; Dalseno, J.; Dash, M.; Dragic, J.; Eidelman, S.; Fratina, S.; Gabyshev, N.; Gershon, T.; Go, A.; Gokhroo, G.; Golob, B.; Ha, H.; Haba, J.; Hara, T.; Hayasaka, K.; Hayashii, H.; Hazumi, M.; Heffernan, D.; Hoshi, Y.; Hou, S.; Hou, W.-S.; Hsiung, Y. B.; Iijima, T.; Ikado, K.; Imoto, A.; Inami, K.; Ishikawa, A.; Ishino, H.; Itoh, R.; Iwasaki, M.; Iwasaki, Y.; Kaji, H.; Kang, J. H.; Katayama, N.; Kawai, H.; Kawasaki, T.; Khan, H. R.; Kichimi, H.; Kim, Y. J.; Kinoshita, K.; Korpar, S.; Krizan, P.; Kulasiri, R.; Kuo, C. C.; Kwon, Y.-J.; Lange, J. S.; Lee, J.; Lee, M. J.; Lee, S. E.; Lesiak, T.; Limosani, A.; Mandl, F.; Matsumoto, T.; McOnie, S.; Mitaroff, W.; Miyabayashi, K.; Miyaki, H.; Miyata, H.; Miyazaki, Y.; Mizuk, R.; Mohapatra, D.; Mori, T.; Nakamura, I.; Nakano, E.; Nakao, M.; Nishida, S.; Nitoh, O.; Noguchi, S.; Nozaki, T.; Ogawa, S.; Ohshima, T.; Okuno, S.; Olsen, S. L.; Onuki, Y.; Ozaki, H.; Pakhlov, P.; Pakhlova, G.; Park, C. W.; Park, H.; Park, K. S.; Pestotnik, R.; Piilonen, L. E.; Sahoo, H.; Sakai, Y.; Satoyama, N.; Schietinger, T.; Schneider, O.; Schuemann, J.; Schwartz, A. J.; Senyo, K.; Shapkin, M.; Singh, J. B.; Sokolov, A.; Somov, A.; Soni, N.; Stanic, S.; Staric, M.; Stoeck, H.; Sumiyoshi, T.; Tajima, O.; Takasaki, F.; Tamai, K.; Tamura, N.; Tanaka, M.; Taylor, G. N.; Teramoto, Y.; Tian, X. C.; Tikhomirov, I.; Trabelsi, K.; Tsukamoto, T.; Uehara, S.; Uglov, T.; Ueno, K.; Unno, Y.; Uno, S.; Usov, Y.; Varner, G.; Villa, S.; Wang, C. C.; Wang, C. H.; Wang, M.-Z.; Watanabe, Y.; Won, E.; Xie, Q. L.; Yabsley, B. D.; Yamaguchi, A.; Yamashita, Y.; Yamauchi, M.; Zhang, C. C.; Zhang, L. M.; Zhang, Z. P.; Zhilich, V.; Zupanc, A.
- Issue Date
- May-2007
- Publisher
- AMER PHYSICAL SOC
- Citation
- PHYSICAL REVIEW LETTERS, v.98, no.18, pp.1 - 6
- Indexed
- SCIE
SCOPUS
- Journal Title
- PHYSICAL REVIEW LETTERS
- Volume
- 98
- Number
- 18
- Start Page
- 1
- End Page
- 6
- ISSN
- 0031-9007
- Abstract
- Using 449x10(6) B(B) over bar pairs collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider, we observe clear signals for B+->(K) over bar K-0(+) and B-0 ->(K) over bar K-0(0) decays with 5.3 sigma and 6.0 sigma significance, respectively. We measure the branching fractions B(B+->(K) over bar K-0(+))=(1.22(-0.28-0.16)(+0.32+0.13))x10(-6) and B(B-0 ->(K) over bar K-0(0))=(0.87(-0.20)(+0.25)+/- 0.09)x10(-6), and partial-rate asymmetries A(CP)(B+->(K) over bar K-0(+))=0.13(-0.24)(+0.23)+/- 0.02 and A(CP)(B-0 ->(K) over bar K-0(0))=-0.58(-0.66)(+0.73)+/- 0.04. From a simultaneous fit, we also obtain B(B+-> K-0 pi(+))=(22.8(-0.7)(+0.8)+/- 1.3)x10(-6) and A(CP)(B+-> K-0 pi(+))=0.03 +/- 0.03 +/- 0.01. The first and second error in the branching fractions and the partial-rate asymmetries are statistical and systematic, respectively. No signal is observed for B-0 -> K+K- decays, and for this branching fraction, we set an upper limit of 4.1x10(-7) at the 90% confidence level.
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Related Researcher
- Cheon, Byung Gu
- COLLEGE OF NATURAL SCIENCES (DEPARTMENT OF PHYSICS)