Bounds on the CP asymmetry in like-sign dileptons from B(0)B*(0) meson decays.

D E Jaffe,R Mahapatra,G Masek,H P Paar, D M Asner,A Eppich,T S Hill,R J Morrison,R A Briere,G P Chen,T Ferguson,H Vogel,A Gritsan,J P Alexander,R Baker,C Bebek,B E Berger,K Berkelman,F Blanc,V Boisvert,D G Cassel,P S Drell,J E Duboscq,K M Ecklund,R Ehrlich,P Gaidarev,L Gibbons,B Gittelman,S W Gray,D L Hartill,B K Heltsley,P I Hopman,L Hsu,C D Jones,J Kandaswamy,D L Kreinick,M Lohner,A Magerkurth,T O Meyer,N B Mistry,E Nordberg,M Palmer, J R Patterson,D Peterson,D Riley,A Romano,J G Thayer,D Urner,B Valant-Spaight,G Viehhauser,A Warburton,P Avery,C Prescott,A I Rubiera,H Stoeck,J Yelton,G Brandenburg,A Ershov,D Y Kim,R Wilson,T Bergfeld,B I Eisenstein,J Ernst,G E Gladding,G D Gollin,R M Hans,E Johnson,I Karliner,M A Marsh,C Plager,C Sedlack, M Selen,J J Thaler,J Williams,K W Edwards,R Janicek,P M Patel,A J Sadoff,R Ammar,A Bean,D Besson,X Zhao,S Anderson,V V Frolov,Y Kubota, S J Lee,J J O'Neill,R Poling,T Riehle,A Smith,C J Stepaniak,J Urheim,S Ahmed,M S Alam,S B Athar,L Jian,L Ling,M Saleem,S Timm,F Wappler,A Anastassov,E Eckhart,K K Gan,C Gwon,T Hart,K Honscheid,D Hufnagel,H Kagan,R Kass,T K Pedlar,H Schwarthoff,J B Thayer,E von Toerne,M M Zoeller,S J Richichi,H Severini, P Skubic,A Undrus,V Savinov,S Chen,J Fast,J W Hinson,J Lee,D H Miller,E I Shibata,I P Shipsey,V Pavlunin,D Cronin-Hennessy,A L Lyon,W Park,E H Thorndike,T E Coan,V Fadeyev,Y S Gao,Y Maravin,I Narsky,R Stroynowski,J Ye,T Wlodek,M Artuso,C Boulahouache,K Bukin,E Dambasuren,G Majumder, R Mountain,S Schuh,T Skwarnicki,S Stone, J C Wang,A Wolf,J Wu,S Kopp,M Kostin,A H Mahmood,S E Csorna,I Danko,K W McLean,Z Xu,R Godang,G Bonvicini, D Cinabro,M Dubrovin,S McGee,G J Zhou,A Bornheim,E Lipeles,S P Pappas,M Schmidtler,A Shapiro,W M Sun,A J Weinstein

Physical review letters（2001）

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摘要

We have measured the charge asymmetry in like-sign dilepton yields from B(0)B*(0) meson decays using the CLEO detector at the Cornell Electron Storage Ring. We find a(0)(ll) identical with[N(l(+)l(+))-N(l(-)l(-))]/[N(l(+)l(+))+N(l(-)l(-))] = +0.013+/-0.050+/-0.005. We combine this result with a previous, independent measurement and obtain Re(epsilon(B))/(1+ the absolute value of epsilon(B)(2)) = +0.0035+/-0.0103+/-0.0015 (uncertainties are statistical and systematic, respectively) for the CP impurity parameter, epsilon(B).

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cleo,cp violation

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