Observation of Radiative B → φKγ Decays

Alexey G. Drutskoy,Kazuo Abe,Tetsuo Abe,Hiroaki Aihara,Mitsuhiro Akatsu,Yûzo Asano,Vladimir M. Aulchenko,Tagir A Kh Aushev,A. M. Bakich,Yong Ban,Aurelio Bay,I. V. Bedny,Prafulla Kumar Behera,Ilija Bizjak, Alex E. Bondar,Andrzej Bozek,Marko Bračko,Thomas E. Browder,Brendan C K Casey,Yuan Chào,Byunggu Cheon,Ruslan N. Chistov,Yoonsuk Choi,A. Chuvikov,Michael V. Danilov,M. Dash,LiaoYuan Dong,Simon I. Eidelman,V. Eiges,N. I. Gabyshev,Alexei Yu Garmash,Tim J. Gershon,Boštjan Golob,Junji Haba,Caren Hagner,F. Handa,Nicholas C. Hastings,Hisaki Hayashii,Masashi Hazumi,Luc Hinz,T. Hokuue,Yoshimoto Hoshi,Weishu Hou,Hsuancheng Huang,Youichi Igarashi,Toru Iijima,Kenji Inami,Akimasa Ishikawa,Ryosuke Itoh,Hiroyuki Iwasaki,Masahiko Iwasaki, Yoshihito Iwasaki,HyukKyoo Jang,Joohoon Kang,JooSang Kang,Piotr J. Kapusta,Nobuhiko Katayama,Takeo Kawasaki,Hiromichi Kichimi,D. W. Kim,Heejong Kim, Hyunwoo Kim,Joon Kim,Junghyun Kìm,Kay Kinoshita,Patrick Koppenburg,Samo Korpar,Peter Križan,Pavel P. Krokovny,Youngjoon Kwon,Sangho Lee,Tadeusz Lesiak,Jiang Li,Jimmy N. Macnaughton,Daniel R. Marlow,Toshiro Matsumoto,Adam Tomasz Matyja,Winfried A. Mitaroff,Hitoshi Miyata,Debabrata K. Mohapatra,Glenn R. Moloney,Toshinori Mori,Tadashi Nagamine,Yasushi Nagasaka,Takeshi Nakadaira,Eiichi Nakano,Mikihiko Nakao,JongWon Nam,Z. Natkaniec,Shohei Nishida,Osamu Nitoh,Satoru Ogawa,Takayoshi Ohshima,Shin'ya Okuno,Stephen Lars Olsen,W. Ostrowicz,Hitoshi Ozaki,P. N. Pakhlov,Henryk Pałka,C. W. Park,H. K. Park,Kyoungsook Park,N. Parslow,Michael W. Peters,Leo E. Piilonen,N. I. Root,Hiroyuki Sagawa,Satoshi Saitoh,Yoshihide Sakai,Tapas R. Sarangi,Amit Satpathy,Olivier Schneider,J. Schümann,A. J. Schwartz,Sergey V. Semenov,K. Senyo,Martin E. Sevior,Hiroshi Shibuya,Boris A. Shwartz,Veniamin A. Sidorov,Jaivir B. Singh,Nitesh O. Soni,Samo Stanič,Marko Starič,A. Sugi,K. Sumisawa,Takayuki Sumiyoshi,Shiro Suzuki,Sohyamagata Suzuki,Fumihiko Takasaki,Norio Tamura,M. H. Tanaka,Yoshiki Teramoto,T. Tomura,Karim Trabelsi,Toru Tsuboyama,Toshifumi Tsukamoto,Sadaharu Uehara,Shoji Uno,Gary S. Varner,Kevin E. Varvell,Chunghsiang Wang,Jiangui Wang,Hiroshi Wang,Yasushi Watanabe,Eunil Won,Yoshikazu Yamada,Yousuke Yamashita,Masanori Yamauchi,Ye Yuan,Yuki Yusa,Ziping Zhang,Victor N. Zhilich,Dejan Žontar

Physical Review Letters（2004）

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摘要

The radiative decay B → ΦKγ is observed for the first time. The branching fraction for the charged B - → ΦK - γ decay mode is measured to be B(B - → ΦK - γ) = (3.4 ′ 0.9 ′ 0.4) X 10 - 6 . The photon energy distribution forthe B - → ΦK - γ decay is presented. The signal for the neutral B 0 → ΦK 0 γ decay mode is not statistically significant and an upper limit, B(Β 0 → ΦK 0 γ) \u003c 8.3 × 10 - 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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