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Measurement of the B ¯ →xsγ branching fraction with a sum of exclusive decays MEASUREMENT of THE. T. SAITO et al.
Date Issued
04-03-2015
Author(s)
Saito, T.
Ishikawa, A.
Yamamoto, H.
Abdesselam, A.
Adachi, I.
Aihara, H.
Al Said, S.
Arinstein, K.
Asner, D. M.
Aushev, T.
Ayad, R.
Bakich, A. M.
Bansal, V.
Bhuyan, B.
Bobrov, A.
Bondar, A.
Bonvicini, G.
Bozek, A.
BraÄ ko, M.
Browder, T. E.
ÄŒervenkov, D.
Chen, A.
Cheon, B. G.
Chilikin, K.
Cho, K.
Chobanova, V.
Choi, S. K.
Choi, Y.
Cinabro, D.
Dalseno, J.
Danilov, M.
Dingfelder, J.
DoleŽal, Z.
Drásal, Z.
Drutskoy, A.
Eidelman, S.
Farhat, H.
Fast, J. E.
Ferber, T.
Gaur, V.
Gabyshev, N.
Ganguly, S.
Garmash, A.
Getzkow, D.
Gillard, R.
Goh, Y. M.
Golob, B.
Haba, J.
Hara, T.
Hasenbusch, J.
Hayasaka, K.
Hayashii, H.
He, X. H.
Higuchi, T.
Horiguchi, T.
Hou, W. S.
Hyun, H. J.
Iijima, T.
Inami, K.
Itoh, R.
Iwasaki, Y.
Jaegle, I.
Joffe, D.
Julius, T.
Kang, K. H.
Kato, E.
Kawasaki, T.
Kichimi, H.
Kiesling, C.
Kim, D. Y.
Kim, H. J.
Kim, J. B.
Kim, J. H.
Kim, M. J.
Kim, S. H.
Kim, Y. J.
Kinoshita, K.
Ko, B. R.
Kodyš, P.
Korpar, S.
KriŽan, P.
Krokovny, P.
Kronenbitter, B.
Kuhr, T.
Kwon, Y. J.
Lange, J. S.
Lee, I. S.
Li, Y.
Li Gioi, L.
Indian Institute of Technology, Madras
Liventsev, D.
Lukin, P.
Matvienko, D.
Miyabayashi, K.
Miyata, H.
Mizuk, R.
Mohanty, G. B.
Moll, A.
Mori, T.
Mussa, R.
Abstract
We use 772×106 BB¯ meson pairs collected at the ?(4S) resonance with the Belle detector to measure the branching fraction for B¯→Xsγ. Our measurement uses a sum-of-exclusives approach in which 38 of the hadronic final states with strangeness equal to +1, denoted by Xs, are reconstructed. The inclusive branching fraction for MXs<2.8GeV/c2, which corresponds to a minimum photon energy of 1.9 GeV, is measured to be B(B¯→Xsγ)=(3.51±0.17±0.33)×10-4, where the first uncertainty is statistical and the second is systematic.
Volume
91