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Evidence for Direct CP Violation in B-+/- -> eta h(+/-) and Observation of B-0 -> eta K-0
- Authors
- Hoi, C. -T.; Chang, P.; Aihara, H.; Asner, D. M.; Aushev, T.; Bakich, A. M.; Belous, K.; Bhardwaj, V.; Bhuyan, B.; Bischofberger, M.; Bondar, A.; Bozek, A.; Bracko, M.; Browder, T. E.; Chang, M. -C.; Chao, Y.; Chen, A.; Chen, K. -F.; Chen, P.; Cheon, G.; Chilikin, K.; Cho, K.; Choi, Y.; Danilov, M.; Drasal, Z.; Drutskoy, A.; Eidelman, S.; Fast, J. E.; Gaur, V.; Gabyshev, N.; Goh, Y. M.; Golob, B.; Haba, J.; Hayasaka, K.; Hoshi, Y.; Hou, W. -S.; Hsiung, Y. B.; Hyun, H. J.; Inami, K.; Ishikawa, A.; Iwabuchi, M.; Iwasaki, Y.; Iwashita, T.; Kang, J. H.; Kawasaki, T.; Kim, H. J.; Kim, H. O.; Kim, J. B.; Kim, J. H.; Kim, K. T.; Kim, M. J.; Kinoshita, K.; Ko, B. R.; Kobayashi, N.; Kodys, P.; Korpar, S.; Krizan, P.; Kuhr, T.; Kumita, T.; Kwon, Y. -J.; Lee, S. -H.; Li, J.; Libby, J.; Liu, Z. Q.; Louvot, R.; Matvienko, D.; McOnie, S.; Miyabayashi, K.; Miyata, H.; Mohanty, G. B.; Moll, A.; Nakano, E.; Nakao, M.; Neubauer, S.; Nishida, S.; Nishimura, K.; Nitoh, O.; Ohshima, T.; Okuno, S.; Park, C. W.; Park, H. K.; Pedlar, T. K.; Pestotnik, R.; Petric, M.; Piilonen, L. E.; Ritter, M.; Roehrken, M.; Sahoo, H.; Sakai, Y.; Sanuki, T.; Schneider, O.; Schwanda, C.; Schwartz, A. J.; Senyo, K.; Sevior, M. E.; Shapkin, M.; Shebalin, V.; Shen, C. P.; Shibata, T. -A.; Shiu, J. -G.; Simon, F.; Smerkol, P.; Sohn, Y. -S.; Sokolov, A.; Solovieva, E.; Staric, M.; Sumihama, M.; Tanaka, S.; Tatishvili, G.; Teramoto, Y.; Trabelsi, K.; Uchida, M.; Uglov, T.; Unno, Y.; Uno, S.; Varner, G.; Wang, C. H.; Wang, M. -Z.; Wang, P.; Watanabe, Y.; Williams, K. M.; Won, E.; Yamaoka, J.; Yamashita, Y.; Yusa, Y.; Zhilich, V.; Zupanc, A.
- Issue Date
- 20-Jan-2012
- Publisher
- AMER PHYSICAL SOC
- Citation
- PHYSICAL REVIEW LETTERS, v.108, no.3
- Indexed
- SCIE
SCOPUS
- Journal Title
- PHYSICAL REVIEW LETTERS
- Volume
- 108
- Number
- 3
- ISSN
- 0031-9007
- Abstract
- We report measurements of the branching fractions and CP asymmetries for B-+/- -> eta h(+/-) (h = K or pi) and the observation of the decay B-0 -> eta K-0 from the final data sample of 772 x 10(6) B (B) over bar pairs collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The measured branching fractions are B(B-+/- -> eta K-+/-) = (2.12 +/- 0.23 +/- 0.11) x 10(-6), B(B-+/- -> eta pi(+/-)) = (4.07 +/- 0.26 +/- 0.21) x 10(-6), and B(B-0 -> eta K-0) = (1.27(-0.29)(+0.33) +/- 0.08) x 10(-6), where the last decay is observed for the first time with a significance of 5.4 standard deviations (sigma). We also find evidence for CP violation in the charged B modes, A(CP)(B-+/- -> eta K-+/-) = -0.38 +/- 0.11 +/- 0.01 and A(CP)(B-+/- -> eta pi(+/-)) = -0.19 +/- 0.06 +/- 0.01 with significances of 3.8 sigma and 3.0 sigma, respectively. For all measurements, the first and second uncertainties are statistical and systematic, respectively.
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Related Researcher
- Won, Eun il
- College of Science (Department of Physics)