Search forB+→ℓ+νℓγdecays with hadronic tagging using the full Belle data sample

Andreas Heller ,Y Watanabe,A Kuzmin,Y Teramoto,M Shapkin,T Iijima,P Goldenzweig,M Starič,V Savinov,P Katrenko,A Garmash,L Pesántez,C Van Hulse,A Drutskoy,E Nakano,P Krokovny,T Aushev,E Barberio,M Ritter,R Gillard,K Miyabayashi,T Kuhr,K Hayasaka,E Kato,R Mizuk,B Golob,A Moll,A Bondar,V Gaur,T Uglov,K Inami,M Nayak,M Huschle,S Ogawa,Y Iwasaki,T Sanuki,M Nakao,I Badhrees,R Itoh,P Križan,J Stypula,S Korpar,G Varner,J Libby,S Eidelman,Z Doležal,Y Sakai,Y Yamashita,H Farhat,P Lewis,M Steder,K Kinoshita,M Heider,A Ishikawa,P Urquijo,V Chobanova,K Trabelsi,K Arinstein,D Matvienko,T Horiguchi,V Zhilich,A Chen,K Cho,O Schneider,R Ayad,Z Natkaniec,A Rostomyan,G Schnell,K Senyo,P Kodyš,Y Sato,R Glattauer,A Vossen,D Getzkow,F Simon,D Joffe,H Miyata,S Sandilya,G Pakhlova,C Oswald,E Won,Z Drásal,V Shebalin,S Uno,A Abdesselam,D Červenkov,M Heck,T Kumita,C Pulvermacher,M Bračko,K Adamczyk,A Zupanc,P Vanhoefer,V Aulchenko,M Petrič,D Dutta,R Pestotnik,R Mussa,J Haba,B Shwartz,Y Unno,E Ribežl,Y Choi,U Tamponi,V Babu,I Adachi,C Schwanda,N Gabyshev,B Pal,H Aihara,S Ryu,P Lukin,M Danilov,D Cinabro,T Nanut,S Yashchenko,A Sibidanov,A Vinokurova,W.-S Hou,T Kawasaki,B Bhuyan,V Bhardwaj,S Okuno,A Sokolov,T Ferber,G Bonvicini,M Uchida,M Feindt,J Grygier,S Nishida,T A Shibata ,J B Kim ,M E Sevior ,K M Williams ,G B Mohanty ,H K Moon ,A M Bakich ,J H Kim ,S H Kim ,M Z Wang ,T E Browder ,K T Kim ,L Šantelj ,B G Cheon ,J E Fast ,X L Wang ,Hyangkyu Park ,H J Kim ,B G Fulsom ,N K Nisar ,Y S Sohn ,L E Piilonen ,X He ,J S Lange ,B R Ko ,Jyoti Prakash Biswal ,I S Lee ,C P Shen ,Z P Zhang ,D M Asner ,S L Olsen ,A Bożek ,T K Pedlar ,I Jaeglé ,J G Shiu ,D Y Kim ,Y M Goh ,Y Kwon ,M N Wagner

doi:10.1103/physrevd.91.112009

Abstract

We search for the decay B+ -> l+ nu gamma with l+ = e+ or mu+ using the full Belle data set of 772 x 10^6 BBbar pairs, collected at the Y(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We reconstruct one B meson in a hadronic decay mode and search for the B+ -> l+ nu gamma decay in the remainder of the event. We observe no significant signal within the phase space of E_gamma^sig > 1 GeV and obtain upper limits of BR(B+ -> e+ nu gamma) < 6.1 x 10^-6, BR(B+ -> mu+ nu gamma) < 3.4 x 10^-6, and BR(B+ -> l+ nu gamma) < 3.5 x 10^-6 at 90 % credibility level.

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