Search for $B_{s}^{0}\rightarrowγγ$ and a measurement of the branching fraction for $B_{s}^{0}\rightarrowϕγ$
Creators: name: Belle Collaboration
name: Dutta, D.
name: Bhuyan, B.
name: Abdesselam, A.
name: Adachi, I.
name: Aihara, H.
name: Said, S. Al
name: Arinstein, K.
name: Asner, D. M.
name: Aulchenko, V.
name: Aushev, T.
name: Ayad, R.
name: Aziz, T.
name: Bahinipati, S.
name: Bakich, A. M.
name: Bansal, V.
name: Bhardwaj, V.
name: Bobrov, A.
name: Bonvicini, G.
name: Bračko, M.
name: Browder, T. E.
name: Červenkov, D.
name: Chen, A.
name: Cheon, B. G.
name: Chilikin, K.
name: Chistov, R.
name: Cho, K.
name: Chobanova, V.
name: Choi, Y.
name: Cinabro, D.
name: Dalseno, J.
name: Doležal, Z.
name: Drásal, Z.
name: Drutskoy, A.
name: Dutta, K.
name: Eidelman, S.
name: Farhat, H.
name: Fast, J. E.
name: Frost, O.
name: Gaur, V.
name: Ganguly, S.
name: Garmash, A.
name: Getzkow, D.
name: Goh, Y. M.
name: Golob, B.
name: Hayashii, H.
name: He, X. H.
name: Hou, W. -S.
name: Iijima, T.
name: Ishikawa, A.
name: Iwasaki, Y.
name: Jaegle, I.
name: Joffe, D.
name: Kang, K. H.
name: Kato, E.
name: Kiesling, C.
name: Kim, D. Y.
name: Kim, J. B.
name: Kim, J. H.
name: Kim, K. T.
name: Kim, M. J.
name: Kim, S. H.
name: Kim, Y. J.
name: Kinoshita, K.
name: Ko, B. R.
name: Kodyš, P.
name: Korpar, S.
name: Križan, P.
name: Krokovny, P.
name: Kuhr, T.
name: Kuzmin, A.
name: Kwon, Y. -J.
name: Lange, J. S.
name: Lee, I. S.
name: Lewis, P.
name: Li, Y.
name: Gioi, L. Li
name: Libby, J.
name: Liventsev, D.
name: Matvienko, D.
name: Miyata, H.
name: Mizuk, R.
name: Mohanty, G. B.
name: Moll, A.
name: Mori, T.
name: Mussa, R.
name: Nakano, E.
name: Nakao, M.
name: Nanut, T.
name: Nayak, M.
name: Nisar, N. K.
name: Nishida, S.
name: Ogawa, S.
name: Okuno, S.
name: Pakhlov, P.
name: Pakhlova, G.
name: Pedlar, T. K.
name: Pestotnik, R.
name: Petrič, M.
name: Piilonen, L. E.
name: Ribežl, E.
name: Ritter, M.
name: Rostomyan, A.
name: Sakai, Y.
name: Sandilya, S.
name: Santelj, L.
name: Sanuki, T.
name: Sato, Y.
name: Savinov, V.
name: Schneider, O.
name: Schnell, G.
name: Schwanda, C.
name: Schwartz, A. J.
name: Semmler, D.
name: Shebalin, V.
name: Shibata, T. -A.
name: Shiu, J. -G.
name: Shwartz, B.
name: Sibidanov, A.
name: Simon, F.
name: Sohn, Y. -S.
name: Sokolov, A.
name: Solovieva, E.
name: Starič, M.
name: Sumihama, M.
name: Sumiyoshi, T.
name: Teramoto, Y.
name: Trabelsi, K.
name: Uchida, M.
name: Unno, Y.
name: Uno, S.
name: Usov, Y.
name: Van Hulse, C.
name: Vanhoefer, P.
name: Varner, G.
name: Vinokurova, A.
name: Vossen, A.
name: Wagner, M. N.
name: Wang, C. H.
name: Wang, P.
name: Watanabe, Y.
name: Wehle, S.
name: Williams, K. M.
name: Won, E.
name: Yamamoto, H.
name: Yamaoka, J.
name: Yashchenko, S.
name: Yusa, Y.
name: Zhang, Z. P.
name: Zhilich, V.
name: Zupanc, A.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: We search for the decay $B_{s}^{0}\rightarrowγγ$ and measure the branching fraction for $B_{s}^{0}\rightarrowϕγ$ using 121.4~$\textrm{fb}^{-1}$ of data collected at the $Υ(\mathrm{5}S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^{+}e^{-}$ collider. The $B_{s}^{0}\rightarrowϕγ$ 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 $B_{s}^{0}\rightarrowγγ$ 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.
description: 6 pages, 3 figures