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）
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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