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Measurement of inclusive radiative B-meson decays with a photon energy threshold of 1.7 GeV

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posted on 2024-08-06, 10:19 authored by A. Limosani, H. Aihara, K. Arinstein, T. Aushev, A. M. Bakich, V. Balagura, E. Barberio, A. Bay, K. Belous, M. Bischofberger, A. Bondar, A. Bozek, M. Bračko, T. E. Browder, P. Chang, Y. Chao, A. Chen, B. G. Cheon, Y. Choi, J. Dalseno, M. Danilov, A. Drutskoy, W. Dungel, S. Eidelman, P. Goldenzweig, B. Golob, H. Ha, H. Hayashii, Y. Hoshi, W. S. Hou, H. J. Hyun, K. Inami, R. Itoh, Y. Iwasaki, T'Mir Julius, D. H. Kah, H. O. Kim, S. K. Kim, Y. I. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, S. Korpar, M. Kreps, P. Križan, P. Krokovny, T. Kuhr, R. Kumar, Y. J. Kwon, S. H. Kyeong, T. Lesiak, J. Li, Chang Liu, D. Liventsev, R. Louvot, A. Matyja, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, T. Mori, M. Nakao, H. Nakazawa, S. Nishida, K. Nishimura, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, H. Ozaki, G. Pakhlova, C. W. Park, H. Park, L. E. Piilonen, M. Rozanska, H. Sahoo, Y. Sakai, O. Schneider, J. Schümann, C. Schwanda, A. J. Schwartz, K. Senyo, M. E. Sevior, M. Shapkin, V. Shebalin, C. P. Shen, J. G. Shiu, J. B. Singh, S. Stanič, M. Starič, K. Sumisawa, T. Sumiyoshi, S. Suzuki, G. N. Taylor, Y. Teramoto, K. Trabelsi, T. Tsuboyama, S. Uehara, Y. Unno, S. Uno, P. Urquijo, Y. Ushiroda, G. Varner, K. E. Varvell, K. Vervink, C. H. Wang, M. Z. Wang, P. Wang, Y. Watanabe, R. Wedd, J. Wicht, E. Won, B. D. Yabsley, H. Yamamoto, Y. Yamashita, Z. P. Zhang, T. Zivko, A. Zupanc
Using 605fb-1 of data collected at the Υ(4S) resonance we present a measurement of the inclusive radiative B-meson decay channel, B→Xsγ. For the lower photon energy thresholds of 1.7, 1.8, 1.9, and 2.0 GeV, as defined in the rest frame of the B meson, we measure the partial branching fraction and the mean and variance of the photon energy spectrum. At the 1.7 GeV threshold we obtain the partial branching fraction BF(B→Xsγ)=(3.45±0. 15±0.40)×10-4, where the errors are statistical and systematic.

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ISSN

1079-7114

Journal title

Physical Review Letters

Volume

103

Issue

24

Article number

article no. 241801

Publisher

American Physical Society

Copyright statement

Copyright © 2009 American Physical Society. The published version is reproduced in accordance with the copyright policy of the publisher.

Language

eng

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