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          Institute: MPI für Physik     Collection: YB 2016     Display Documents

ID: 715988.0, MPI für Physik / YB 2016
Search for $B_{s}^{0}\\rightarrow\\gamma\\gamma$ and a measurement of the branching fraction for $B_{s}^{0}\\rightarrow\\phi\\gamma$
Authors:Belle Collaboration; 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.; Bračko, M.; Browder, T. E.; Červenkov, D.; Chen, A.; Cheon, B. G.; Chilikin, K.; Chistov, R.; Cho, K.; Chobanova, V.; Choi, Y.; Cinabro, D.; Dalseno, J.; Doležal, Z.; Drásal, 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.; Kodyš, P.; Korpar, S.; Križan, P.; Krokovny, P.; Kuhr, T.; Kuzmin, A.; Kwon, Y. -J.; Lange, J. S.; Lee, I. S.; Lewis, P.; Li, Y.; Li Gioi, L.; 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.; Petrič, M.; Piilonen, L. E.; Ribežl, 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.; Starič, 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.
Date of Publication (YYYY-MM-DD):2015
Title of Journal:Physical Review D
Journal Abbrev.:Phys.Rev.D
Issue / Number:91
Start Page:011101
Audience:Not Specified
Intended Educational Use:No
Abstract / Description:We search for the decay $B_{s}^{0}\\rightarrow\\gamma\\gamma$ and measure the branching fraction for $B_{s}^{0}\\rightarrow\\phi\\gamma$ using 121.4~$\\textrm{fb}^{-1}$ of data collected at the $\\Upsilon(\\mathrm{5}S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^{+}e^{-}$ collider. The $B_{s}^{0}\\rightarrow\\phi\\gamma$ branching fraction is measured to be $(3.6 \\pm 0.5 (\\mathrm{stat.}) \\pm 0.3 (\\mathrm{syst.}) \\pm 0.6 (f_{s})) \\times 10^{-5}$, where $f_{s}$ is the fraction of $B_{s}^{(*)}\\bar{B}_{s}^{(*)}$ in $b\\bar{b}$ 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 $B_{s}^{0}\\rightarrow\\gamma\\gamma$ and set a $90\\%$ confidence-level upper limit on its branching fraction at $ 3.1 \\times 10^{-6}$. This constitutes a significant improvement over the previous result.
Classification / Thesaurus:Belle II
Comment of the Author/Creator:6 pages, 3 figures
External Publication Status:published
Document Type:Article
Communicated by:MPI für Physik
Affiliations:MPI für Physik
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