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Measurements of isospin asymmetry and difference of direct CP asymmetries in inclusive B -> X-s gamma decays
- Authors
- Watanuki, S.; Ishikawa, A.; Adachi, I; Aihara, H.; Al Said, S.; Asner, D. M.; Aushev, T.; Ayad, R.; Babu, V; Badhrees, I; Bakich, A. M.; Bansal, V; Behera, P.; Beleno, C.; Berger, M.; Bhardwaj, V; Bhuyan, B.; Bilka, T.; Biswal, J.; Bobrov, A.; Bonvicini, G.; Bozek, A.; Bracko, M.; Browder, T. E.; Cao, L.; Cervenkov, D.; Chang, P.; Cheon, B. G.; Chilikin, K.; Cho, K.; Choi, Y.; Choudhury, S.; Cinabro, D.; Cunliffe, S.; Di Carlo, S.; Dingfelder, J.; Dong, T., V; Eidelman, S.; Epifanov, D.; Fast, J. E.; Ferber, T.; Frey, A.; Fulsom, B. G.; Gaur, V; Gabyshev, N.; Garmash, A.; Gelb, M.; Giri, A.; Goldenzweig, P.; Guan, Y.; Guido, E.; Haba, J.; Hayasaka, K.; Hayashii, H.; Hou, W-S; Iijima, T.; Inami, K.; Inguglia, G.; Itoh, R.; Iwasaki, M.; Iwasaki, Y.; Jacobs, W. W.; Jaegle, I; Jeon, H. B.; Jia, S.; Jin, Y.; Joo, K. K.; Julius, T.; Karyan, G.; Kawasaki, T.; Kiesling, C.; Kim, D. Y.; Kim, J. B.; Kim, S. H.; Kinoshita, K.; Kodys, P.; Korpar, S.; Kotchetkov, D.; Krizan, P.; Kroeger, R.; Krokovny, P.; Kuhr, T.; Kumar, R.; Kuzmin, A.; Kwon, Y-J; Lee, I. S.; Lee, S. C.; Li, L. K.; Li, Y. B.; Li Gioi, L.; Libby, J.; Liventsev, D.; Lubej, M.; Luo, T.; Masuda, M.; Matsuda, T.; Merola, M.; Miyabayashi, K.; Miyata, H.; Mizuk, R.; Mohanty, G. B.; Mori, T.; Nakao, M.; Nanut, T.; Nath, K. J.; Niiyama, M.; Nishida, S.; Nishimura, K.; Ogawa, K.; Ogawa, S.; Okuno, S.; Ono, H.; Ostrowicz, W.; Pakhlov, P.; Pakhlova, G.; Pal, B.; Park, H.; Paul, S.; Pedlar, T. K.; Pestotnik, R.; Piilonen, L. E.; Prencipe, E.; Ritter, M.; Rostomyan, A.; Russo, G.; Sakai, Y.; Sandilya, S.; Santelj, L.; Savinov, V; Schneider, O.; Schnell, G.; Schueler, J.; Schwanda, C.; Schwartz, A. J.; Seino, Y.; Senyo, K.; Seon, O.; Shebalin, V; Shibata, T-A; Shiu, J-G; Shwartz, B.; Sokolov, A.; Solovieva, E.; Stanic, S.; Staric, M.; Sumiyoshi, T.; Sutcliffe, W.; Takizawa, M.; Tanida, K.; Taniguchi, N.; Tenchini, F.; Uchida, M.; Uglov, T.; Unno, Y.; Uno, S.; Vahsen, S. E.; Van Hulse, C.; Van Tonder, R.; Varner, G.; Varvell, K. E.; Vossen, A.; Wang, B.; Wang, C. H.; Wang, M-Z; Wang, P.; Watanabe, M.; Widmann, E.; Won, E.; Ye, H.; Yin, J. H.; Yusa, Y.; Zakharov, S.; Zhang, Z. P.; Zhilich, V; Zhukova, V; Zhulanov, V; Zupanc, A.
- Issue Date
- 20-2월-2019
- Publisher
- AMER PHYSICAL SOC
- Citation
- PHYSICAL REVIEW D, v.99, no.3
- Indexed
- SCIE
SCOPUS
- Journal Title
- PHYSICAL REVIEW D
- Volume
- 99
- Number
- 3
- ISSN
- 2470-0010
- Abstract
- We report measurements of isospin asymmetry Delta(0-) and difference of direct CP asymmetries Delta A(CP) between charged and neutral B -> X-s gamma decays. This analysis is based on the data sample containing 772 x 10(6)B (B) over bar pairs that was collected with the Belle detector at the KEKB energy-asymmetric ethornecollider. Using a sum-of-exclusive technique with invariant X-s mass up to 2.8 GeV= c2, we obtain Delta(0-) = [0.48 +/- 1.49(stat) +/- 0.97(syst) +/- 1.15(f(+-)/f(00))]% and Delta A(CP) = [+3.69 +/- 2.65(stat) +/- 0.76(syst)]%, where the last uncertainty for.0-is due to the uncertainty on the production ratio of B+B- to B-0(B) over bar (0) in.o4Sthorn decays. The measured value of Delta(0-) is consistent with zero, allowing us to constrain the resolved photon contribution in the B -> X-s gamma, and improve the branching fraction prediction. The result for Delta A(CP) is consistent with the prediction of the SM. We also measure the direct CP asymmetries for charged and neutral B -> X-s gamma decays. All the measurements are the most precise to date.
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