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

Using 605 fb(-1) of data collected at the Upsilon(4S) resonance we present a measurement of the inclusive radiative B-meson decay channel, B-->X(s)gamma. 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 branc...

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Veröffentlicht in:	Physical review letters 2009-12, Vol.103 (24), p.241801-241801, Article 241801
Hauptverfasser:	Limosani, A, Aihara, H, Arinstein, K, Aushev, T, Bakich, A M, Balagura, V, Barberio, E, Bay, A, Belous, K, Bischofberger, M, Bondar, A, Bozek, A, Bracko, M, Browder, T E, Chang, P, Chao, Y, Chen, A, Cheon, B G, Choi, Y, Dalseno, J, Danilov, M, Drutskoy, A, Dungel, W, Eidelman, S, Goldenzweig, P, Golob, B, Ha, H, Hayashii, H, Hoshi, Y, Hou, W-S, Hyun, H J, Inami, K, Itoh, R, Iwasaki, Y, Julius, T, Kah, D H, Kim, H O, Kim, S K, Kim, Y I, Kim, Y J, Kinoshita, K, Ko, B R, Korpar, S, Kreps, M, Krizan, P, Krokovny, P, Kuhr, T, Kumar, R, Kwon, Y-J, Kyeong, S-H, Lesiak, T, Li, J, Liu, C, Liventsev, D, Louvot, R, Matyja, A, Miyabayashi, K, Miyata, H, Miyazaki, Y, Mizuk, R, Mori, T, Nakao, M, Nakazawa, H, Nishida, S, Nishimura, K, Nitoh, O, Nozaki, T, Ogawa, S, Ohshima, T, Okuno, S, Ozaki, H, Pakhlova, G, Park, C W, Park, H, Piilonen, L E, Rozanska, M, Sahoo, H, Sakai, Y, Schneider, O, Schümann, J, Schwanda, C, Schwartz, A J, Senyo, K, Sevior, M E, Shapkin, M, Shebalin, V, Shen, C P, Shiu, J-G, Singh, J B, Stanic, S, Staric, M, Sumisawa, K, Sumiyoshi, T, Suzuki, S, Taylor, G N, Teramoto, Y, Trabelsi, K, Tsuboyama, T, Uehara, S, Unno, Y
Format:	Artikel
Sprache:	eng
Schlagworte:	B MESONS BEAUTY MESONS BEAUTY PARTICLES BOSONS BRANCHING RATIO DECAY DIMENSIONLESS NUMBERS ELEMENTARY PARTICLES ENERGY RANGE ENERGY SPECTRA GEV RANGE GEV RANGE 01-10 HADRONS Light MASSLESS PARTICLES MESONS PARTICLE DECAY PHOTONS PHYSICS OF ELEMENTARY PARTICLES AND FIELDS PSEUDOSCALAR MESONS RADIATIVE DECAY SPECTRA Spectrum Analysis Thermodynamics
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Beschreibung
Zusammenfassung:	Using 605 fb(-1) of data collected at the Upsilon(4S) resonance we present a measurement of the inclusive radiative B-meson decay channel, B-->X(s)gamma. 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-->X(s)}gamma)=(3.45+/-0.15+/-0.40)x10(-4), where the errors are statistical and systematic.
ISSN:	0031-9007 1079-7114
DOI:	10.1103/PhysRevLett.103.241801