Measurement of time-dependent CP asymmetries and the CP-odd fraction in the decay B0-->D(*+)D(*-).

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Lafferty,P Kyberd,U Mallik,J A Mckenna,M Morii,S Passaggio,J Roy,F F Wilson,E Maly,H P Paar,R S Dubitzky,W Roethel,A N Yushkov,R W Kadel,G Vasileiadis,G Blaylock,R De Sangro,D Bettoni,J L Harton,D Aston,S Yang,J M Losecco,V B Koptchev,D P Stoker,T J Harrison,L T Kerth,F Simonetto,V Miftakov,D W G S Leith,G Vasseur,F Ferroni,P Strother,S J Gowdy,A W Borgland,S Playfer,J Brose,Y Groysman,C T Potter,G R Bonneaud,G Tiozzo,S Luitz,D Lavin,M Benayoun,A Kurup,H U Flaecher,G Finocchiaro,E I Rosenberg,A T Watson,M Posocco,D Falciai,G Marchiori,F Salvatore,E Torrence,D J Payne,I M Peruzzi,K T Flood,L Piemontese,R J Wilson,W T Meyer,T Colberg,W H Toki,A Seiden,J C Chen,R Baldini-Ferroli,A Lu,E P Solodov,A Olivas,R Gamet,N De Groot,M R Convery,H Staengle,C E Marker,C Bozzi,R Stroili,A P Onuchin,S Bailey,A Hauke,E Charles,A Calcaterra,C Gatto,G De Nardo,R C Penny,C Hearty,R Calabrese,S Jayatilleke,A Zallo,N I Geddes,R Contri,D G Hitlin,G Cavoto,R J Parry,C M Hawkes,M Bondioli,M Haire,E J Hill,D 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Boutigny,M Dickopp,V Lepeltier,V Lillard,S Bettarini,T B Moore,N K Watson,H W Shorthouse,D Dong,F Bellini,A Jawahery,A Gaidot,H W Zhao,M Verderi,M Morganti,M D Sokoloff,A Höcker,G Lynch,P J Oddone,G Crosetti,J Beringer,S Saremi,K R Schubert,F Anulli,M Carpinelli,I Ofte,W Kozanecki,R L Flack,R E Schmitz,M A Winter,M Chao,Q K Wong,V Eschenburg,F Sandrelli,F Palombo,M G Wilson,A Romosan,O L Buchmueller,A V Telnov,M L Kocian,N A Roe,I Eschrich,L Del Buono,A Lazzaro,F Muheim,N Neri,G Wagner,M R Monge,A Soffer,M Kay,A Sarti,S Chen,J Cohen-Tanugi,D Kovalskyi,V Azzolini,M Langer,M Morandin,S Laplace,A Khan,N Cavallo,J Stark,T Adye,S Plaszczynski,P F Harrison,L Zhang,D N Brown,V Re,G J Grenier,P Elmer,M E Levi,L Roos,A K Mckemey,J Zhang,W Verkerke,A V Gritsan,W Walkowiak,T Brandt,U Schwanke,J Allison,M Negrini,H Koch,P A Hart,O Long,D R Muller,A J Bevan,E Robutti,P Wang,Yu I Skovpen,J R Gaillard,P Kim,S T’Jampens,V Sharma,J Panetta,J Cochran,A Farbin,L Cremaldi,S Tosi,R Waldi,J Olsen,M 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doi:10.1103/physrevlett.91.131801

Abstract

We present a measurement of time-dependent CP asymmetries and an updated determination of the CP-odd fraction in the decay B0-->D(*+)D(*-) using a data sample of 88x10(6)BB pairs collected by the BABAR detector at the PEP-II B Factory at SLAC. We determine the CP-odd fraction to be 0.063+/-0.055(stat)+/-0.009(syst). The time-dependent CP asymmetry parameters Im(lambda(+)) and /lambda(+)/ are determined to be 0.05+/-0.29(stat)+/-0.10(syst) and 0.75+/-0.19(stat)+/-0.02(syst), respectively. The standard model predicts these parameters to be -sin(2beta and 1, respectively, in the absence of penguin diagram contributions.

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