Observation of X(3872) -> J/psi gamma and Search for X(3872) -> psi 'gamma in B Decays

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Title:	Observation of X(3872) -> J/psi gamma and Search for X(3872) -> psi 'gamma in B Decays
Authors:	Bhardwaj,V;Trabelsi,K;Singh,JB;Choi,SK;Olsen,SL;Adachi,I;Adamczyk,K;Asner,DM;Aulchenko,V;Aushev,T;Aziz,T;Bakich,AM;Barberio,E;Belous,K;Bhuyan,B;Bischofberger,M;Bondar,A;Bracko,M;Brodzicka,J;Browder,TE;Chen,A;Chen,P;Cheon,BG;Cho,K;Choi,Y;Dalseno,J;Dolezal,Z;Eidelman,S;Epifanov,D;Gaur,V;Gabyshev,N;Golob,B;Haba,J;Hayasaka,K;Hayashii,H;Horii,Y;Hoshi,Y;Hou,WS;Hsiung,YB;Hyun,HJ;Iijima,T;Inami,K;Ishikawa,A;Iwabuchi,M;Iwasaki,Y;Iwashita,T;Joshi,NJ;Julius,T;Kang,JH;Kawasaki,T;Kiesling,C;Kim,HO;Kim,JB;Kim,JH;Kim,KT;Kim,MJ;Kim,SK;Kim,YJ;Kinoshita,K;Ko,BR;Kobayashi,N;Korpar,S;Krizan,P;Kumar,R;Kumita,T;Kuzmin,A;Kwon,YJ;Lange,JS;Lee,MJ;Lee,SH;Li,Y;Libby,J;Lim,CL;Liventsev,D;Louvot,R;Matvienko,D;McOnie,S;Miyabayashi,K;Miyata,H;Miyazaki,Y;Mizuk,R;Mohanty,GB;Mussa,R;Nakano,E;Nakao,M;Nakazawa,H;Natkaniec,Z;Ng,C;Nishida,S;Nitoh,O;Nozaki,T;Ohshima,T;Okuno,S;Onuki,Y;Pakhlova,G;Park,CW;Park,HK;Pestotnik,R;Petric,M;Piilonen,LE;Rohrken,M;Sahoo,H;Sakai,K;Sakai,Y;Sanuki,T;Schneider,O;Schwanda,C;Seon,O;Shapkin,M;Shebalin,V;Shibata,TA;Shiu,JG;Shwartz,B;Smerkol,P;Sohn,YS;Sokolov,A;Solovieva,E;Stanic,S;Staric,M;Sumiyoshi,T;Tatishvili,G;Teramoto,Y;Uchida,M;Uehara,S;Uglov,T;Unno,Y;Uno,S;Usov,Y;Varner,G;Vossen,A;Wang,XL;Watanabe,M;Watanabe,Y;Williams,KM;Yabsley,BD;Yamashita,Y;Yuan,CZ;Zhang,CC;Zhang,ZP;Zhilich,V;Zhou,P;Zhulanov,V;Zupanc,A
Contributors:	物理學系
Date:	2011
Issue Date:	2012-06-11 10:51:04 (UTC+8)
Publisher:	國立中央大學
Abstract:	We report a study of B -> (J/psi gamma)K and B -> (psi'gamma)K decay modes using 772 X 10(6) B (B) over bar events collected at the Y(4S) resonance with the Belle detector at the KEKB energy-asymmetric e(+)e(-) collider. We observe X(3872) -> J/psi gamma and report the first evidence for chi(c2) -> J/psi gamma in B -> (X(c (c) over bar)gamma)K decays, while in a search for X(3872) -> psi'gamma no significant signal is found. We measure the branching fractions, B(B(+/-) -> X(3872)K(+/-))B(X(3872) -> J/psi gamma) = (1.78(-0.44)(+0.48) +/- 0.12) X 10(-6), B(B(+/-) -> chi(c2)K(+/-)) = (1.11(-0.34)(+0.36) +/- 0.09) X 10(-5), B(B(+) -> X(3872)K(+))B(X(3872) -> psi'gamma) < 3.45 X 10(-6) (upper limit at 90% C. L.), and also provide upper limits for other searches.
Relation:	PHYSICAL REVIEW LETTERS
Appears in Collections:	[物理學系] 期刊論文

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