First observation of radiative B(0) -> phi K(0)gamma decays and measurements of their time-dependent CP violation

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题名:	First observation of radiative B(0) -> phi K(0)gamma decays and measurements of their time-dependent CP violation
作者:	Sahoo,H;Browder,TE;Adachi,I;Asner,DM;Aulchenko,V;Bakich,AM;Barberio,E;Belous,K;Bhardwaj,V;Bhuyan,B;Bondar,A;Bozek,A;Bracko,M;Brovchenko,O;Chen,A;Chen,P;Cheon,BG;Cho,K;Choi,Y;Dalseno,J;Dolezal,Z;Drasal,Z;Eidelman,S;Epifanov,D;Fast,JE;Gaur,V;Gabyshev,N;Haba,J;Hayasaka,K;Hayashii,H;Horii,Y;Hoshi,Y;Hou,WS;Hsiung,YB;Hyun,HJ;Iijima,T;Inami,K;Ishikawa,A;Itoh,R;Iwabuchi,M;Iwasaki,Y;Iwashita,T;Joshi,NJ;Julius,T;Kang,JH;Kawasaki,T;Kiesling,C;Kim,HJ;Kim,HO;Kim,JB;Kim,JH;Kim,KT;Kim,MJ;Kim,SK;Kim,YJ;Kinoshita,K;Ko,BR;Kobayashi,N;Koblitz,S;Kodys,P;Korpar,S;Krizan,P;Kuhr,T;Kumar,R;Kumita,T;Kuzmin,A;Kwon,YJ;Lange,JS;Lee,MJ;Lee,SH;Li,J;Li,Y;Libby,J;Lim,CL;Liu,ZQ;Liventsev,D;Louvot,R;Matvienko,D;McOnie,S;Miyabayashi,K;Miyata,H;Miyazaki,Y;Mizuk,R;Mohanty,GB;Mori,T;Nakao,M;Natkaniec,Z;Ng,C;Nishida,S;Nishimura,K;Nitoh,O;Nozaki,T;Ohshima,T;Okuno,S;Olsen,SL;Onuki,Y;Pakhlov,P;Pakhlova,G;Park,CW;Park,HK;Peng,T;Pestotnik,R;Petric,M;Piilonen,LE;Prim,M;Rohrken,M;Ryu,S;Sakai,K;Sakai,Y;Sanuki,T;Schneider,O;Schwanda,C;Schwartz,AJ;Senyo,K;Seon,O;Sevior,ME;Shapkin,M;Shebalin,V;Shibata,TA;Shiu,JG;Shwartz,B;Simon,F;Smerkol,P;Sohn,YS;Sokolov,A;Solovieva,E;Stanic,S;Staric,M;Sumihama,M;Sumisawa,K;Sumiyoshi,T;Suzuki,S;Tatishvili,G;Teramoto,Y;Trabelsi,K;Uchida,M;Uglov,T;Unno,Y;Uno,S;Ushiroda,Y;Vahsen,SE;Varner,G;Vinokurova,A;Watanabe,M;Watanabe,Y;Williams,KM;Won,E;Yabsley,BD;Yamashita,Y;Yuan,CZ;Yusa,Y;Zhang,CC;Zhang,ZP;Zhilich,V;Zhou,P;Zhulanov,V;Zupanc,A
贡献者:	物理學系
关键词:	BELLE
日期:	2011
上传时间:	2012-06-11 10:48:59 (UTC+8)
出版者:	國立中央大學
摘要:	We report the first observation of the radiative decay B(0) -> phi K(0)gamma using a data sample of 772 x 10(6) B (B) over bar pairs collected at the Gamma(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We observe a signal of 37 +/- 8 events with a significance of 5.4 standard deviations including systematic uncertainties. The measured branching fraction is B(B(0) ->phi K(0)gamma) = (2.74 +/- 0.60 +/- 0.32) x 10(-6), where the uncertainties are statistical and systematic, respectively. We also report the first measurements of time-dependent CP-violation parameters: S(phi K0s gamma) = +0.74(-1.05)(+0.72)(stat)(-0.024)(+0.10)(syst) and A phi(0)(Ks)gamma = +0.35 +/- 0.58(stat)(-0.10)(+0.23)(syst). Furthermore, we measure B(B(+) -> phi K(+)gamma) = (2.48 +/- 0.30 +/- 0.24) x 10(-6), A(CP) = -0.03 +/- 0.11 +/- 0.08, and find that the signal is concentrated in the M(phi K) mass region near threshold.
關聯:	PHYSICAL REVIEW D
显示于类别:	[物理學系] 期刊論文

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