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

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 Bracko; 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 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 Krizan; P Krokovny; T Kuhr; R Kumar; Y-J Kwon; S-H Kyeong; T Lesiak; J Li; C 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 Stanic; M Staric; 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; Belle Collaboration

doi:10.1103/PhysRevLett.103.241801

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

Phys Rev Lett. 2009 Dec 11;103(24):241801. doi: 10.1103/PhysRevLett.103.241801. Epub 2009 Dec 7.

Authors

A Limosani¹, H Aihara, K Arinstein, T Aushev, A M Bakich, V Balagura, E Barberio, A Bay, K Belous, M Bischofberger, A Bondar, A Bozek, M Bracko, 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 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 Krizan, P Krokovny, T Kuhr, R Kumar, Y-J Kwon, S-H Kyeong, T Lesiak, J Li, C 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 Stanic, M Staric, 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; Belle Collaboration

Affiliation

¹ University of Melbourne, School of Physics, Victoria 3010.

PMID: 20366195
DOI: 10.1103/PhysRevLett.103.241801

Abstract

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.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Light*
Mesons*
Photons*
Spectrum Analysis
Thermodynamics