Measurement of the Differential Branching Fraction and Forward-Backward Asymmetry for B -> K((*))l(+) l(-)

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题名:	Measurement of the Differential Branching Fraction and Forward-Backward Asymmetry for B -> K((*))l(+) l(-)
作者:	Wei,JT;Chang,P;Adachi,I;Aihara,H;Aulchenko,V;Aushev,T;Bakich,AM;Balagura,V;Barberio,E;Bondar,A;Bozek,A;Bracko,M;Browder,TE;Chang,YW;Chao,Y;Chen,A;Chen,KF;Cheon,BG;Chiang,CC;Cho,IS;Choi,Y;Dalseno,J;Drutskoy,A;Dungel,W;Eidelman,S;Gabyshev,N;Goldenzweig,P;Golob,B;Ha,H;Han,BY;Hayasaka,K;Hayashii,H;Hazumi,M;Horii,Y;Hoshi,Y;Hou,WS;Hyun,HJ;Iijima,T;Inami,K;Itoh,R;Iwasaki,M;Iwasaki,Y;Kah,DH;Kaji,H;Kang,JH;Kapusta,P;Katayama,N;Kawasaki,T;Kichimi,H;Kim,HJ;Kim,HO;Kim,SK;Kim,YI;Kim,YJ;Kinoshita,K;Ko,BR;Korpar,S;Krizan,P;Krokovny,P;Kuzmin,A;Kwon,YJ;Kyeong,SH;Lange,JS;Lee,MJ;Lee,SE;Lesiak,T;Li,J;Limosani,A;Liu,C;Liventsev,D;Louvot,R;Mandl,F;Matyja,A;McOnie,S;Medvedeva,T;Miyabayashi,K;Miyata,H;Miyazaki,Y;Mizuk,R;Nakano,E;Nakao,M;Nakazawa,H;Natkaniec,Z;Nishida,S;Nishimura,K;Nitoh,O;Nozaki,T;Ogawa,S;Ohshima,T;Okuno,S;Ozaki,H;Pakhlova,G;Park,CW;Park,H;Park,HK;Park,KS;Piilonen,LE;Rozanska,M;Sahoo,H;Sakai,K;Sakai,Y;Schneider,O;Schwanda,C;Schwartz,AJ;Seidl,R;Sekiya,A;Senyo,K;Sevior,ME;Shapkin,M;Shen,CP;Shiu,JG;Shwartz,B;Stanic,S;Staric,M;Sumiyoshi,T;Suzuki,S;Tanaka,M;Taylor,GN;Teramoto,Y;Trabelsi,K;Uehara,S;Uglov,T;Unno,Y;Uno,S;Urquijo,P;Usov,Y;Varner,G;Varvell,KE;Vervink,K;Wang,CC;Wang,CH;Wang,MZ;Wang,P;Wang,XL;Watanabe,Y;Wedd,R;Wicht,J;Won,E;Yabsley,BD;Yamashita,Y;Yamauchi,M;Yuan,CZ;Zhang,ZP;Zivko,T;Zupanc,A;Zyukova,O
贡献者:	物理研究所
关键词:	DECAYS;BELLE;MODEL
日期:	2009
上传时间:	2010-07-08 14:00:17 (UTC+8)
出版者:	中央大學
摘要:	We study B -> Kd()l(+)l(-) decays (l = e,u) based on a data sample of 657 x 10(6) B (B) over bar pairs collected with the Belle detector at the KEKB e(+)e(-) collider. We report the differential branching fraction, isospin asymmetry, K polarization, and the forward-backward asymmetry (A(FB)) as functions of q(2) = M(ll)(2)c(2). The fitted A(FB) spectrum exceeds the standard model expectation by 2.7 standard deviations. The measured branching fractions are B(B -> Kl(+)l(-)) = (10: 7(-1.0)(+1.1)) x 10(-7) and B(B -> Kl(+)l(-)) = (4.8 (+0.5)(-0.4) +/- 0.3) x 10(-7), where the first errors are statistical and the second are systematic, with the muon to electron ratios R-K = 0.83 +/- 0: 17 +/- 0.08 and R-K = 1.03 +/- 0.19 +/- 0.06.
關聯:	PHYSICAL REVIEW LETTERS
显示于类别:	[物理研究所] 期刊論文

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