Evidence for a New Resonance and Search for the Y(4140) in the gamma gamma -> phi J/psi Process

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题名:	Evidence for a New Resonance and Search for the Y(4140) in the gamma gamma -> phi J/psi Process
作者:	Shen,CP;Yuan,CZ;Aihara,H;Arinstein,K;Aushev,T;Bakich,AM;Balagura,V;Barberio,E;Bay,A;Belous,K;Bhardwaj,V;Bischofberger,M;Bracko,M;Browder,TE;Chang,MC;Chang,P;Chen,A;Chen,P;Cheon,BG;Chiang,CC;Cho,IS;Choi,Y;Dalseno,J;Das,A;Dolezal,Z;Drutskoy,A;Eidelman,S;Epifanov,D;Gabyshev,N;Golob,B;Ha,H;Haba,J;Han,BY;Hayasaka,K;Hayashii,H;Horii,Y;Hoshi,Y;Hou,WS;Hsiung,YB;Hyun,HJ;Inami,K;Itoh,R;Iwabuchi,M;Iwasaki,M;Iwasaki,Y;Joshi,NJ;Julius,T;Kang,JH;Kawasaki,T;Kiesling,C;Kim,HJ;Kim,HO;Kim,JH;Kim,SK;Kim,YI;Kim,YJ;Ko,BR;Kodys,P;Korpar,S;Kreps,M;Krizan,P;Krokovny,P;Kuhr,T;Kwon,YJ;Kyeong,SH;Lange,JS;Lee,MJ;Lee,SH;Li,J;Liu,C;Liu,Y;Liventsev,D;Louvot,R;Matyja,A;McOnie,S;Miyabayashi,K;Miyata,H;Miyazaki,Y;Mori,T;Mussa,R;Nakano,E;Nakao,M;Nakazawa,H;Natkaniec,Z;Neubauer,S;Nishida,S;Nishimura,K;Nitoh,O;Ohshima,T;Okuno,S;Olsen,SL;Pakhlova,G;Park,CW;Park,H;Park,HK;Pestotnik,R;Petric,M;Piilonen,LE;Rohrken,M;Ryu,S;Sahoo,H;Sakai,Y;Schneider,O;Senyo,K;Sevior,ME;Shapkin,M;Shiu,JG;Shwartz,B;Singh,JB;Smerkol,P;Sokolov,A;Solovieva,E;Staric,M;Teramoto,Y;Trabelsi,K;Uehara,S;Uglov,T;Unno,Y;Uno,S;Urquijo,P;Varner,G;Vervink,K;Wang,CH;Wang,P;Wang,XL;Watanabe,Y;Wedd,R;Won,E;Yabsley,BD;Yamashita,Y;Zhang,CC;Zhang,ZP;Zivko,T;Zyukova,O
贡献者:	物理學系
关键词:	BELLE;IDENTIFICATION;MESONS;KEKB
日期:	2010
上传时间:	2012-06-11 10:42:32 (UTC+8)
出版者:	國立中央大學
摘要:	The process gamma gamma -> phi J/psi is measured using a data sample of 825 fb(-1) collected with the Belle detector. A narrow peak of 8:8(-3.2)(+4.2) events, with a significance of 3.2 standard deviations including systematic uncertainty, is observed. The mass and natural width of the structure [named X(4350)] are measured to be [4350.6(-5.1)(+4.6)(stat) +/- 0.7(syst)] MeV/c(2) and [13(-9)(+18)(stat) +/- 4(syst)] MeV, respectively. The product of its two-photon decay width and branching fraction to phi J/psi is 6.7(-2.4)(+3.2) (stat) +/- 1.1(syst)] eV for J(P) = 0(+), or [1.5(-0.6)(+0.7) (stat) +/- 0.3 (syst)]eV for J(P) = 2(+). No signal for the Y(4140) ->phi J/psi structure reported by the CDF Collaboration in B -> K(+) phi J/psi decays is observed, and limits of Gamma(gamma gamma) (Y(4140))B(Y(4140) -> phi J/psi) < 41 eV for J(P) = 0(+) or <6.0 eV for J(P) = 2(+) are determined at the 90% C. L. This disfavors the scenario in which the Y(4140) is a D(s)(+)D(s)(-) molecule.
關聯:	PHYSICAL REVIEW LETTERS
显示于类别:	[物理學系] 期刊論文

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