Observation of radiative B-->phi K gamma decays

A Drutskoy; K Abe; K Abe; T Abe; H Aihara; M Akatsu; Y Asano; V Aulchenko; T Aushev; A M Bakich; Y Ban; A Bay; I Bedny; P K Behera; I Bizjak; A Bondar; A Bozek; M Bracko; T E Browder; B C K Casey; Y Chao; B G Cheon; R Chistov; Y Choi; A Chuvikov; M Danilov; M Dash; L Y Dong; S Eidelman; V Eiges; N Gabyshev; A Garmash; T Gershon; B Golob; J Haba; C Hagner; F Handa; N C Hastings; H Hayashii; M Hazumi; L Hinz; T Hokuue; Y Hoshi; W-S Hou; H-C Huang; Y Igarashi; T Iijima; K Inami; A Ishikawa; R Itoh; H Iwasaki; M Iwasaki; Y Iwasaki; H K Jang; J H Kang; J S Kang; P Kapusta; N Katayama; T Kawasaki; H Kichimi; D W Kim; H J Kim; Hyunwoo Kim; J H Kim; S K Kim; K Kinoshita; P Koppenburg; S Korpar; P Krizan; P Krokovny; Y-J Kwon; S H Lee; T Lesiak; J Li; J MacNaughton; D Marlow; T Matsumoto; A Matyja; W Mitaroff; H Miyata; D Mohapatra; G R Moloney; T Mori; T Nagamine; Y Nagasaka; T Nakadaira; E Nakano; M Nakao; J W Nam; Z Natkaniec; S Nishida; O Nitoh; S Ogawa; T Ohshima; S Okuno; S L Olsen; W Ostrowicz; H Ozaki; P Pakhlov; H Palka; C W Park; H Park; K S Park; N Parslow; M Peters; L E Piilonen; N Root; H Sagawa; S Saitoh; Y Sakai; T R Sarangi; A Satpathy; O Schneider; J Schümann; A J Schwartz; S Semenov; K Senyo; M E Sevior; H Shibuya; B Shwartz; V Sidorov; J B Singh; N Soni; S Stanic; M Staric; A Sugi; K Sumisawa; T Sumiyoshi; S Suzuki; S Y Suzuki; F Takasaki; N Tamura; M Tanaka; Y Teramoto; T Tomura; K Trabelsi; T Tsuboyama; T Tsukamoto; S Uehara; S Uno; G Varner; K E Varvell; C H Wang; J G Wang; M-Z Wang; Y Watanabe; E Won; Y Yamada; Y Yamashita; M Yamauchi; Y Yuan; Y Yusa; Z P Zhang; V Zhilich; D Zontar; Belle Collaboration

doi:10.1103/PhysRevLett.92.051801

Observation of radiative B-->phi K gamma decays

Phys Rev Lett. 2004 Feb 6;92(5):051801. doi: 10.1103/PhysRevLett.92.051801. Epub 2004 Feb 3.

Authors

A Drutskoy¹, K Abe, K Abe, T Abe, H Aihara, M Akatsu, Y Asano, V Aulchenko, T Aushev, A M Bakich, Y Ban, A Bay, I Bedny, P K Behera, I Bizjak, A Bondar, A Bozek, M Bracko, T E Browder, B C K Casey, Y Chao, B G Cheon, R Chistov, Y Choi, A Chuvikov, M Danilov, M Dash, L Y Dong, S Eidelman, V Eiges, N Gabyshev, A Garmash, T Gershon, B Golob, J Haba, C Hagner, F Handa, N C Hastings, H Hayashii, M Hazumi, L Hinz, T Hokuue, Y Hoshi, W-S Hou, H-C Huang, Y Igarashi, T Iijima, K Inami, A Ishikawa, R Itoh, H Iwasaki, M Iwasaki, Y Iwasaki, H K Jang, J H Kang, J S Kang, P Kapusta, N Katayama, T Kawasaki, H Kichimi, D W Kim, H J Kim, Hyunwoo Kim, J H Kim, S K Kim, K Kinoshita, P Koppenburg, S Korpar, P Krizan, P Krokovny, Y-J Kwon, S H Lee, T Lesiak, J Li, J MacNaughton, D Marlow, T Matsumoto, A Matyja, W Mitaroff, H Miyata, D Mohapatra, G R Moloney, T Mori, T Nagamine, Y Nagasaka, T Nakadaira, E Nakano, M Nakao, J W Nam, Z Natkaniec, S Nishida, O Nitoh, S Ogawa, T Ohshima, S Okuno, S L Olsen, W Ostrowicz, H Ozaki, P Pakhlov, H Palka, C W Park, H Park, K S Park, N Parslow, M Peters, L E Piilonen, N Root, H Sagawa, S Saitoh, Y Sakai, T R Sarangi, A Satpathy, O Schneider, J Schümann, A J Schwartz, S Semenov, K Senyo, M E Sevior, H Shibuya, B Shwartz, V Sidorov, J B Singh, N Soni, S Stanic, M Staric, A Sugi, K Sumisawa, T Sumiyoshi, S Suzuki, S Y Suzuki, F Takasaki, N Tamura, M Tanaka, Y Teramoto, T Tomura, K Trabelsi, T Tsuboyama, T Tsukamoto, S Uehara, S Uno, G Varner, K E Varvell, C H Wang, J G Wang, M-Z Wang, Y Watanabe, E Won, Y Yamada, Y Yamashita, M Yamauchi, Y Yuan, Y Yusa, Z P Zhang, V Zhilich, D Zontar; Belle Collaboration

Affiliation

¹ Institute for Theoretical and Experimental Physics, Moscow.

PMID: 14995295
DOI: 10.1103/PhysRevLett.92.051801

Abstract

The radiative decay B-->phi K gamma is observed for the first time. The branching fraction for the charged B--->phi K- gamma decay mode is measured to be B(B--->phi K- gamma)=(3.4+/-0.9+/-0.4)x10(-6). The photon energy distribution for the B--->phi K- gamma decay is presented. The signal for the neutral B(0)-->phi K(0)gamma decay mode is not statistically significant and an upper limit, B(B(0)-->phi K(0)gamma)<8.3x10(-6) at 90% C.L., is set. The analysis is based on a data set of 90 fb(-1) collected by the Belle experiment at the e(+)e(-) asymmetric collider KEKB.