Observation of B(s)(0) -> D(s)(()*()) + D(s)(()*()) Using e(+)e(-) Collisions and a Determination of the B(s)-(B)over-bar(s) Width Difference Delta Gamma(s)

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題名:	Observation of B(s)(0) -> D(s)(()()) + D(s)(()()) Using e(+)e(-) Collisions and a Determination of the B(s)-(B)over-bar(s) Width Difference Delta Gamma(s)
作者:	Esen,S;Schwartz,AJ;Adachi,I;Aihara,H;Arinstein,K;Aulchenko,V;Aushev,T;Aziz,T;Bakich,AM;Balagura,V;Barberio,E;Bay,A;Bischofberger,M;Bondar,A;Bozek,A;Bracko,M;Browder,TE;Chang,MC;Chang,P;Chen,A;Chen,P;Cheon,BG;Chiang,CC;Choi,Y;Dalseno,J;Dash,M;Dolezal,Z;Drasal,Z;Drutskoy,A;Eidelman,S;Goldenzweig,P;Golob,B;Ha,H;Haba,J;Hara,T;Hayasaka,K;Higuchi,T;Hoshi,Y;Hou,WS;Hsiung,YB;Hyun,HJ;Iijima,T;Inami,K;Itoh,R;Iwabuchi,M;Joshi,NJ;Julius,T;Kang,JH;Kawasaki,T;Kichimi,H;Kim,HJ;Kim,HO;Kim,JH;Kim,YJ;Kinoshita,K;Ko,BR;Kodys,P;Korpar,S;Krizan,P;Krokovny,P;Kuhr,T;Kumita,T;Kwon,YJ;Kyeong,SH;Lange,JS;Lee,SH;Liu,Y;Liventsev,D;Louvot,R;Matyja,A;McOnie,S;Miyata,H;Mizuk,R;Mohanty,GB;Nakano,E;Nakao,M;Nakazawa,H;Natkaniec,Z;Neubauer,S;Nishida,S;Nitoh,O;Ohshima,T;Okuno,S;Olsen,SL;Pakhlov,P;Park,CW;Park,H;Park,HK;Petric,M;Piilonen,LE;Rohrken,M;Ryu,S;Sahoo,H;Sakai,Y;Schneider,O;Schwanda,C;Senyo,K;Sevior,ME;Shapkin,M;Shen,CP;Shiu,JG;Smerkol,P;Solovieva,E;Staric,M;Sumisawa,K;Sumiyoshi,T;Teramoto,Y;Trabelsi,K;Uehara,S;Unno,Y;Uno,S;Urquijo,P;Usov,Y;Varner,G;Varvell,KE;Vervink,K;Wang,CH;Wang,MZ;Wang,P;Watanabe,Y;Wedd,R;Wicht,J;Won,E;Yabsley,BD;Yamashita,Y;Zhang,ZP;Zhilich,V;Zupanc,A
貢獻者:	物理學系
關鍵詞:	PHYSICS;SYSTEM;DECAYS
日期:	2010
上傳時間:	2012-06-11 10:44:48 (UTC+8)
出版者:	國立中央大學
摘要:	We have made the first observation of B(s)(0) -> D(s)(()()+) D(s)(()()-) decays using 23.6 fb(-1) of data recorded by the Belle experiment running on the Y(5S) resonance. The branching fractions are measured to be B(B(s)(0) -> D(s)(+)D(s)(-)) = (1.03(-0.32-0.25)(+0.39+0.26))% B(B(s)(0) -> Ds(+/-)D(s)(-/+)) = (2.75(-0.71)(+0.83) +/- 0.69)%, and B(B(s)(0) -> D(s)(+) D(s)(-)) = (3.08(-1.04-0.86)(+1.22+0.85))%; the sum is B[B(s)(0) -> D(s)(()()+) D(s)(()()-)] = (6.85(-1.30-1.80)(+1.53+1.79))%. Assuming B(s)(0) -> D(s)(()()+) D(s)(()*()-) saturates decays to CP-even final states, the branching fraction determines the ratio Delta Gamma(s)/cos phi, where Delta Gamma(s) is the difference in widths between the two B(s)-(B) over bar (s) mass eigenstates, and phi is a CP-violating weak phase. Taking CP violation to be negligibly small, we obtain Delta Gamma(s)/Delta Gamma(s) = 0.147(-0.030)(+0.036)(stat)(-0.041)(+0.042)(syst), where Gamma(s) is the mean decay width.
關聯:	PHYSICAL REVIEW LETTERS
顯示於類別:	[物理學系] 期刊論文

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