Observation of radiative B-->phi K gamma decays.

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

doi:10.1103/physrevlett.92.051801

Observation of radiative B-->phi K gamma decays.

A Drutskoy, P Krokovny + Show 151 more

Open Access

https://doi.org/10.1103/physrevlett.92.051801

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Journal: Physical Review Letters	Publication Date: Feb 3, 2004
Citations: 15

Affiliation: Budker Institute of Nuclear Physics, University of Lausanne, Peking University, Niigata University, University of Tsukuba, University of Science and Technology of China, Toho University, Tokyo Institute of Technology, Nagoya University, National United University, Osaka City University, Tohoku Gakuin University, University of Ljubljana, The University of Tokyo, Sungkyunkwan University, University of Cincinnati, Tohoku University, University of Maribor, Polish Academy of Sciences, Tokyo Metropolitan University, National Taiwan University, University of Sydney, University of Melbourne, Korea University, Kyungpook National University, Nara Women's University, Yonsei University, Virginia Tech, Tokyo University of Agriculture and Technology, Panjab University, Princeton University, Austrian Academy of Sciences

#Gamma Decay Mode #Gamma Decay + Show 8 more

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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.

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