Evidence for B(-) -> tau(-)(nu)over-bar(tau) with a semileptonic tagging method

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/52748

Title:	Evidence for B(-) -> tau(-)(nu)over-bar(tau) with a semileptonic tagging method
Authors:	Hara,K;Iijima,T;Aihara,H;Aulchenko,V;Aushev,T;Aziz,T;Bakich,AM;Barberio,E;Belous,K;Bischofberger,M;Bondar,A;Bozek,A;Bracko,M;Browder,TE;Chang,P;Chao,Y;Chen,A;Cheon,BG;Chiang,CC;Cho,IS;Choi,Y;Dalseno,J;Danilov,M;Dolezal,Z;Dungel,W;Eidelman,S;Gabyshev,N;Goldenzweig,P;Golob,B;Ha,H;Hasegawa,Y;Hayasaka,K;Hayashii,H;Horii,Y;Hoshi,Y;Hsiung,YB;Hyun,HJ;Inami,K;Iwabuchi,M;Iwasaki,Y;Julius,T;Kang,JH;Kawai,H;Kawasaki,T;Kichimi,H;Kiesling,C;Kim,HJ;Kim,HO;Kim,JH;Kim,MJ;Kim,YJ;Kinoshita,K;Ko,BR;Kodys,P;Korpar,S;Kreps,M;Krizan,P;Krokovny,P;Kuhr,T;Kumita,T;Kuzmin,A;Kwon,YJ;Kyeong,SH;Lee,MJ;Lee,SH;Li,J;Limosani,A;Liu,Y;Liventsev,D;Louvot,R;Matyja,A;McOnie,S;Miyabayashi,K;Miyata,H;Miyazaki,Y;Mohanty,GB;Mori,T;Nakano,E;Nakao,M;Nakazawa,H;Neubauer,S;Nishida,S;Nishimura,K;Nitoh,O;Nozaki,T;Ogawa,S;Ohshima,T;Okuno,S;Olsen,SL;Ozaki,H;Pakhlova,G;Park,CW;Park,HK;Pestotnik,R;Petric,M;Piilonen,LE;Prim,M;Rozanska,M;Ryu,S;Sahoo,H;Sakai,Y;Schneider,O;Schumann,J;Schwanda,C;Schwartz,AJ;Senyo,K;Sevior,ME;Shapkin,M;Shibuya,H;Shiu,JG;Shwartz,B;Singh,JB;Smerkol,P;Solovieva,E;Stanic,S;Staric,M;Sumisawa,K;Sumiyoshi,T;Teramoto,Y;Tikhomirov,I;Trabelsi,K;Uehara,S;Uglov,T;Unno,Y;Uno,S;Ushiroda,Y;Varner,G;Varvell,KE;Vervink,K;Wang,CH;Wang,MZ;Wang,P;Watanabe,Y;Wedd,R;Won,E;Yabsley,BD;Yamashita,Y;Yamauchi,M;Yuan,CZ;Zhang,CC;Zhilich,V;Zivko,T;Zupanc,A;Zyukova,O
Contributors:	物理學系
Keywords:	CP-VIOLATION;DETECTOR
Date:	2010
Issue Date:	2012-06-11 10:42:36 (UTC+8)
Publisher:	國立中央大學
Abstract:	We present a measurement of the decay B(-) -> tau(-)(nu) over bar (tau) using a data sample containing 657 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. A sample of B(+)B(-) pairs are tagged by reconstructing one B(+) meson decaying semileptonically. We detect the B(-) -> tau(-)(nu) over bar (tau) candidate in the recoil. We obtain a signal with a significance of 3.6 standard deviations including systematic uncertainties, and measure the branching fraction to be B(-) -> tau(-)(nu) over bar (tau) [1.54(-0.37)(+0.38) (stat) (+0.29)(-0.31) (syst) x 10(-4). This result confirms the evidence for B(-) -> tau(-)(nu) over bar (tau) obtained in a previous Belle measurement that used a hadronic B tagging method.
Relation:	PHYSICAL REVIEW D
Appears in Collections:	[Department of Physics] journal & Dissertation

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