Measurement of the B → Xsγ branching fraction with a sum of exclusive decays

Measurement of the B → Xsγ branching fraction with a sum of exclusive decays

We use 772 × 106 BB meson pairs collected at the Yð4SÞ 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 þ1, denoted by Xs, are reconstructed. The inclu...

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Veröffentlicht in:Physical review. D 2015-03, Vol.91 (5)
Hauptverfasser: Abdesselam, A., Adachi, I., Al Said, S., Ayad, R., Bakich, A. M., Bobrov, A., Bondar, A., Bonvicini, Giovanni, Browder, Thomas E., Cervenkov, D., Cheon, B. G., Cho, K., Chobanova, V., Choi, S-K., Choi, Y., Cinabro, David A., Dalseno, J., Danilov, M., Fast, James E., Ganguly, Sudeshna, Garmash, Alexey, Getzkow, D., Gillard, R., Goh, Y. M., Golob, B., Haba, J., Hayashii, H., He, X. H., Horiguchi, T., Iijima, T., Jaegle, Igal, Julius, T., Kang, K. H., Kato, E., Kichimi, H., Kim, D. Y., Kim, J. B., Kim, J. H., Kim, S. H., Kim, Y. J., Ko, Byeong Rok, Korpar, S., Lange, J. S., Lee, I. S., Li, Y., Li Gioi, L., Libby, J., Lukin, P., Matvienko, D., Mizuk, R., Mohanty, G. B., Nakano, E., Nakao, M., Nanut, T., Natkaniec, Z., Nisar, N. K., Nishida, S., Ogawa, S., Olsen, Stephen L., Pakhlov, P., Park, H., Pedlar, Todd K., Ribezl, Eva, Ritter, M., Rostomyan, A., Santelj, Luka, Sanuki, T., Sato, Yutaro, Savinov, Vladimir, Schneider, O., Schnell, G., Schwanda, C., Schwartz, Alan J., Senyo, K., Seon, O., Shebalin, V., Shibata, TA, Shwartz, B., Simon, F., Sohn, Young-Soo, Solovieva, E., Staric, M., Steder, M., Tatishvili, Gocha, Teramoto, Y., Trabelsi, K., Uglov, T., Urquijo, P., Ushiroda, Y., Usov, Y., Vanhoefer, P., Vorobyev, V., Wagner, M. N., Watanabe, M., Williams, K. M., Yamaoka, Jared AK, Yashchenko, S., Yusa, Y., Zhilich, V., Zhulanov, V.
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Sprache:eng
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Zusammenfassung:We use 772 × 106 BB meson pairs collected at the Yð4SÞ 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 þ1, denoted by Xs, are reconstructed. The inclusive branching fraction for MXs < 2.8 GeV=c2, which corresponds to a minimum photon energy of 1.9 GeV, is measured to be BðB¯ → XsγÞ¼ð3.51 0.17 0.33Þ × 10-4, where the first uncertainty is statistical and the second is systematic.
ISSN:2470-0010
2470-0029