Measurement of branching fractions, isospin, and CP-violating asymmetries for exclusive b-->dgamma modes

N Taniguchi; M Nakao; S Nishida; I Adachi; H Aihara; K Arinstein; T Aushev; T Aziz; A M Bakich; V Balagura; A Bay; K Belous; V Bhardwaj; U Bitenc; A Bondar; A Bozek; M Bracko; T E Browder; M-C Chang; P Chang; Y Chao; A Chen; K-F Chen; W T Chen; B G Cheon; C-C Chiang; I-S Cho; Y Choi; J Dalseno; M Dash; A Drutskoy; W Dungel; S Eidelman; B Golob; H Ha; J Haba; T Hara; K Hayasaka; H Hayashii; M Hazumi; Y Hoshi; W-S Hou; H J Hyun; T Iijima; K Inami; A Ishikawa; H Ishino; R Itoh; M Iwabuchi; M Iwasaki; Y Iwasaki; N J Joshi; D H Kah; H Kaji; J H Kang; H Kawai; T Kawasaki; H Kichimi; S K Kim; Y I Kim; Y J Kim; K Kinoshita; S Korpar; P Krizan; P Krokovny; R Kumar; A Kuzmin; Y-J Kwon; S-H Kyeong; J S Lange; J S Lee; S E Lee; T Lesiak; A Limosani; S-W Lin; C Liu; Y Liu; D Liventsev; F Mandl; S McOnie; K Miyabayashi; Y Miyazaki; G R Moloney; Y Nagasaka; I Nakamura; E Nakano; H Nakazawa; Z Natkaniec; O Nitoh; T Nozaki; S Ogawa; T Ohshima; S Okuno; S L Olsen; H Ozaki; P Pakhlov; G Pakhlova; C W Park; H Park; H K Park; K S Park; L S Peak; L E Piilonen; H Sahoo; Y Sakai; N Sasao; O Schneider; J Schümann; C Schwanda; A J Schwartz; R Seidl; K Senyo; M E Sevior; M Shapkin; C P Shen; J-G Shiu; B Shwartz; J B Singh; A Sokolov; S Stanic; M Staric; K Sumisawa; T Sumiyoshi; S Y Suzuki; N Tamura; G N Taylor; Y Teramoto; I Tikhomirov; K Trabelsi; T Tsuboyama; S Uehara; T Uglov; Y Unno; S Uno; P Urquijo; G Varner; C H Wang; M-Z Wang; P Wang; X L Wang; Y Watanabe; R Wedd; J Wicht; E Won; B D Yabsley; Y Yamashita; Y Yusa; Z P Zhang; V Zhilich; V Zhulanov; T Zivko; A Zupanc; O Zyukova; Belle Collaboration

doi:10.1103/PhysRevLett.101.111801

Measurement of branching fractions, isospin, and CP-violating asymmetries for exclusive b-->dgamma modes

Phys Rev Lett. 2008 Sep 12;101(11):111801. doi: 10.1103/PhysRevLett.101.111801. Epub 2008 Sep 12.

Authors

N Taniguchi¹, M Nakao, S Nishida, I Adachi, H Aihara, K Arinstein, T Aushev, T Aziz, A M Bakich, V Balagura, A Bay, K Belous, V Bhardwaj, U Bitenc, A Bondar, A Bozek, M Bracko, T E Browder, M-C Chang, P Chang, Y Chao, A Chen, K-F Chen, W T Chen, B G Cheon, C-C Chiang, I-S Cho, Y Choi, J Dalseno, M Dash, A Drutskoy, W Dungel, S Eidelman, B Golob, H Ha, J Haba, T Hara, K Hayasaka, H Hayashii, M Hazumi, Y Hoshi, W-S Hou, H J Hyun, T Iijima, K Inami, A Ishikawa, H Ishino, R Itoh, M Iwabuchi, M Iwasaki, Y Iwasaki, N J Joshi, D H Kah, H Kaji, J H Kang, H Kawai, T Kawasaki, H Kichimi, S K Kim, Y I Kim, Y J Kim, K Kinoshita, S Korpar, P Krizan, P Krokovny, R Kumar, A Kuzmin, Y-J Kwon, S-H Kyeong, J S Lange, J S Lee, S E Lee, T Lesiak, A Limosani, S-W Lin, C Liu, Y Liu, D Liventsev, F Mandl, S McOnie, K Miyabayashi, Y Miyazaki, G R Moloney, Y Nagasaka, I Nakamura, E Nakano, H Nakazawa, Z Natkaniec, O Nitoh, T Nozaki, S Ogawa, T Ohshima, S Okuno, S L Olsen, H Ozaki, P Pakhlov, G Pakhlova, C W Park, H Park, H K Park, K S Park, L S Peak, L E Piilonen, H Sahoo, Y Sakai, N Sasao, O Schneider, J Schümann, C Schwanda, A J Schwartz, R Seidl, K Senyo, M E Sevior, M Shapkin, C P Shen, J-G Shiu, B Shwartz, J B Singh, A Sokolov, S Stanic, M Staric, K Sumisawa, T Sumiyoshi, S Y Suzuki, N Tamura, G N Taylor, Y Teramoto, I Tikhomirov, K Trabelsi, T Tsuboyama, S Uehara, T Uglov, Y Unno, S Uno, P Urquijo, G Varner, C H Wang, M-Z Wang, P Wang, X L Wang, Y Watanabe, R Wedd, J Wicht, E Won, B D Yabsley, Y Yamashita, Y Yusa, Z P Zhang, V Zhilich, V Zhulanov, T Zivko, A Zupanc, O Zyukova; Belle Collaboration

Affiliation

¹ Kyoto University, Kyoto.

PMID: 18851272
DOI: 10.1103/PhysRevLett.101.111801

Abstract

We report new measurements of the decays B+-->rho+gamma, B0-->rho0gamma, and B0-->omegagamma using a data sample of 657x10(6) B meson pairs accumulated with the Belle detector at the KEKB e+e- collider. We measure branching fractions B(B+-->rho+gamma)=(8.7_-2.7-1.1;+2.9+0.9)x10(-7), B(B0-->rho0gamma)=(7.8_-1.6-1.0;+1.7+0.9)x10(-7), and B(B0-->omegagamma)=(4.0_-1.7;+1.9+/-1.3)x10(-7). We also report the isospin asymmetry Delta(rhogamma)=-0.48_-0.19-0.09;+0.21+0.08 and the first measurement of the direct CP-violating asymmetry ACP(B+-->rho+gamma)=-0.11+/-0.32+/-0.09, where the first and second errors are statistical and systematic, respectively.