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| 題名: | Search for B s 0 → γ γ and a measurement of the branching fraction for B s 0 → φ γ |
| 作者: | 陳鎰鋒;Dutta, D.;Bhuyan, B.;Abdesselam, A.;Adachi, I.;Aihara, H.;Said, S. Al;Arinstein, K.;Aushev, T.;Ayad, R.;Bahinipati, S.;Bakich, A. M.;Bhardwaj, V.;Bonvicini, G.;Červenkov, D.;Chen, A.;Cheon, B. G.;Chilikin, K.;Chobanova, V.;Cinabro, D.;Doležal, Z.;Drutskoy, A.;Farhat, H.;Fast, J. E.;Gaur, V.;Garmash, A.;Getzkow, D.;Goh, Y. M.;Golob, B.;Hayashii, H.;He, X. H.;Iijima, T.;Iwasaki, Y.;Jaegle, I.;Joffe, D.;Kang, K. H.;Kato, E.;Kiesling, C.;Kim, J. B.;Kim, K. T.;Kim, M. J.;Kim, S. H.;Kim, Y. J.;Kinoshita, K.;Krokovny, P.;Kuhr, T.;Kwon, Y.-J.;Lange, J. S.;Lee, I. S.;Lewis, P.;Li, Y.;Libby, J.;Matvienko, D.;Mohanty, G. B.;Moll, A.;Mori, T.;Mussa, R.;Nakano, E.;Nakao, M.;Nayak, M.;Nishida, S.;Okuno, S.;Pakhlova, G.;Pedlar, T. K.;Pestotnik, R.;Petrič, M.;Piilonen, L. E.;Ribežl, E.;Rostomyan, A.;Sandilya, S.;Santelj, L.;Sanuki, T.;Savinov, V.;Schneider, O.;Semmler, D.;Shebalin, V.;Shibata, T.-A.;Shiu, J.-G.;Shwartz, B.;Sokolov, A.;Solovieva, E.;Starič, M.;Sumiyoshi, T.;Trabelsi, K.;Uchida, M.;Unno, Y.;Uno, S.;Usov, Y.;Hulse, C. Van;Vanhoefer, P.;Vinokurova, A.;Vossen, A.;Wang, C. H.;Watanabe, Y.;Wehle, S.;Won, E.;Yamamoto, H.;Yashchenko, S.;Yusa, Y.;Zhang, Z. P.;Zhilich, V. |
| 貢獻者: | 理學院物理學系 |
| 關鍵詞: | B/s0 --> 2photon;B/s0 --> Phi photon;B/s0: branching ratio: measured;B/s0: branching ratio: upper limit;B/s0: radiative decay;BELLE;electron positron: annihilation;electron positron: colliding beams;experimental results;High Energy Physics - Experiment;info:eu-repo/classification/ddc/530;KEK-B;Upsilon: electroproduction;Upsilon: hadronic decay |
| 日期: | 2015-01-08 |
| 上傳時間: | 2026-04-23 12:58:28 (UTC+8) |
| 出版者: | American Physical Society;American Physical Society (APS) |
| 摘要: | 摘要： 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. Comment: 6 pages, 3 figures
出版者： American Physical Society (APS)
出版日期： 2015-01-08
出處： Physical Review D, 2015-01, Vol.91 (1)
識別號： ISSN: 1550-7998
識別號： DOI: 10.1103/physrevd.91.011101 |
| 顯示於類別: | [物理學系] 期刊論文
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