Search forCPViolation in the DecayB0→D*±D∓

T Aushev,S Semenov,H Park,M Starič,A Garmash,T Kawasaki,H Miyata,A Drutskoy,K Senyo,S Uno,J S Lange,E Nakano,S Fratina,S Nishida,M Nakao,F Fang,J Dragic,S Eidelman,M Bračko,T Matsumoto,M Dash,A Somov,K Trabelsi,A Kuzmin,T Schietinger,K Ueno,W Ostrowicz,P Pakhlov,Y Yuan,A Chuvikov,F Takasaki,N Gabyshev,T Hokuue,D Mohapatra,R Mizuk,F Mandl,T Higuchi,A Chen,L Hinz,P Krokovny,K Hayasaka,K Kinoshita,T Okabe,S H Lee,M Iwasaki,M Danilov,R Itoh,S Villa,Y Teramoto,L E Piilonen,J Ying,H Miyake,D Liventsev,N Katayama,Y Yamashita,B G Cheon,H R Khan,N C Hastings,Z Natkaniec,L S Peak,U Bitenc,A Yamaguchi,H Ozaki,S L Olsen,K Miyabayashi,T Sumiyoshi,S Uehara,A Ishikawa,Y Hoshi,I Bedny,Y Sakai,N Soni,P Chang,G N Taylor,G Gokhroo,D Žontar,I Bizjak,Y Asano,C H Wang,G Leder,B Golob,S Korpar,T Lesiak,J Macnaughton,P Križan,A Imoto,S L Zang,Y Choi,A J Schwartz,O Schneider,S Ogawa,I Adachi,S Okuno,K Sumisawa,T Uglov,T Tsukamoto,M E Sevior,J H Kang,V Eiges,Z P Zhang,K Inami,H Nakazawa,M Akatsu,J Schümann,A Bay,A M Bakich,H Shibuya,O Nitoh,T Iijima,S U Kataoka,T Ohshima,H Kawai,T Nagamine,R Chistov,T Mori,S Bahinipati,Dong Liu ,W T Chen,Y Nagasaka,Y Kwon ,N Tamura,C C Wang,S Blyth,W Mitaroff,M Tanaka,A Bożek ,T Gershon,P Koppenburg,L M Zhang,R Stamen,H J Kim,K E Varvell,H Ishino,C C Kuo,A Bondar,Y Enari,H Aihara,S Hou,B Yabsley ,J Brodzicka,J S Kang,S W Lin ,K Abe,G Varner,H Pałka ,H Sagawa,M Hazumi,S K Kim,N Sato,J Zhang,T Aziz,J Li,O Tajima,W.-S Hou,Y Chào ,V Zhilich

doi:10.1103/physrevlett.93.201802

Abstract

We report a search for CP-violating asymmetry in B0→D*±D∓ decays. The analysis employs two methods of B0 reconstruction: full and partial. In the full reconstruction method all daughter particles of the B0 are required to be detected; the partial reconstruction technique requires a fully reconstructed D− and only a slow pion from the D*+→D0πslow+ decay. From a fit to the distribution of the time interval corresponding to the distance between two B meson decay points we calculate the CP-violating parameters and find the significance of nonzero CP asymmetry to be 2.7 standard deviations.Received 13 August 2004DOI:https://doi.org/10.1103/PhysRevLett.93.201802©2004 American Physical Society

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