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Search for B-s(0) -> gamma gamma and a measurement of the branching fraction for B-s(0) -> phi gamma

Authors
Dutta, D.Bhuyan, B.Abdesselam, A.Adachi, I.Aihara, H.Al Said, S.Arinstein, K.Asner, D. M.Aulchenko, V.Aushev, T.Ayad, R.Aziz, T.Bahinipati, S.Bakich, A. M.Bansal, V.Bhardwaj, V.Bobrov, A.Bonvicini, G.Bracko, M.Browder, T. E.Cervenkov, D.Chen, A.Cheon, B. G.Chilikin, K.Chistov, R.Cho, K.Chobanova, V.Choi, Y.Cinabro, D.Dalseno, J.Dolezal, Z.Drasal, Z.Drutskoy, A.Dutta, K.Eidelman, S.Farhat, H.Fast, J. E.Frost, O.Gaur, V.Ganguly, S.Garmash, A.Getzkow, D.Goh, Y. M.Golob, B.Hayashii, H.He, X. H.Hou, W. -S.Iijima, T.Ishikawa, A.Iwasaki, Y.Jaegle, I.Joffe, D.Kang, K. H.Kato, E.Kiesling, C.Kim, D. Y.Kim, J. B.Kim, J. H.Kim, K. T.Kim, M. J.Kim, S. H.Kim, Y. J.Kinoshita, K.Ko, B. R.Kodys, P.Korpar, S.Krizan, P.Krokovny, P.Kuhr, T.Kuzmin, A.Kwon, Y. -J.Lange, J. S.Lee, I. S.Lewis, P.Li, Y.Gioi, L. LiLibby, J.Liventsev, D.Matvienko, D.Miyata, H.Mizuk, R.Mohanty, G. B.Moll, A.Mori, T.Mussa, R.Nakano, E.Nakao, M.Nanut, T.Nayak, M.Nisar, N. K.Nishida, S.Ogawa, S.Okuno, S.Pakhlov, P.Pakhlova, G.Pedlar, T. K.Pestotnik, R.Petric, M.Piilonen, L. E.Ribezl, E.Ritter, M.Rostomyan, A.Sakai, Y.Sandilya, S.Santelj, L.Sanuki, T.Sato, Y.Savinov, V.Schneider, O.Schnell, G.Schwanda, C.Schwartz, A. J.Semmler, D.Shebalin, V.Shibata, T. -A.Shiu, J. -G.Shwartz, B.Sibidanov, A.Simon, F.Sohn, Y. -S.Sokolov, A.Solovieva, E.Staric, M.Sumihama, M.Sumiyoshi, T.Teramoto, Y.Trabelsi, K.Uchida, M.Unno, Y.Uno, S.Usov, Y.Van Hulse, C.Vanhoefer, P.Varner, G.Vinokurova, A.Vossen, A.Wagner, M. N.Wang, C. H.Wang, P.Watanabe, Y.Wehle, S.Williams, K. M.Won, E.Yamamoto, H.Yamaoka, J.Yashchenko, S.Yusa, Y.Zhang, Z. P.Zhilich, V.Zupanc, A.
Issue Date
8-1월-2015
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW D, v.91, no.1
Indexed
SCOPUS
Journal Title
PHYSICAL REVIEW D
Volume
91
Number
1
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/94654
DOI
10.1103/PhysRevD.91.011101
ISSN
2470-0010
Abstract
We search for the decay B-s(0) -> gamma gamma and measure the branching fraction for B-s(0) -> phi gamma using 121.4 fb(-1) of data collected at the Upsilon(5S) resonance with the Belle detector at the KEKB asymmetric- energy e(+)e(-) collider. The B-s(0) -> phi gamma branching fraction is measured to be (3.6 +/- 0.5(stat) +/- 0.3(syst) +/- 0.6(f(s))) x 10(-5), where f(s) is the fraction of B-s(()*())(B) over barB(s)(()*()) in b (b) over bar events. Our result is in good agreement with the theoretical predictions as well as with a recent measurement from LHCb. We observe no statistically significant signal for the decay B-s(0) -> gamma gamma and set a 90% confidence- level upper limit on its branching fraction at 3.1 x 10(-6). This constitutes a significant improvement over the previous result.
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