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

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. Li ; Libby, 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. ; Belle Collaboration

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.


Published in:
Physical Review D, 91, 1, 011101(R)
Year:
2015
Publisher:
College Pk, Amer Physical Soc
ISSN:
1550-7998
Laboratories:




 Record created 2015-05-29, last modified 2018-12-03


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