Measurement of branching fractions andCP-violating charge asymmetries forB-meson decays toD(*)D¯(*), and implications for the Cabibbo-Kobayashi-Maskawa angleγ

B Aubert,S I Serednyakov,Y Groysman,M Morganti,K Yu Todyshev,H P Paar,C Roat,S D Foulkes,F Ferrarotto,J W Gary,B N Ratcliff,G Marchiori,M Lu,R Godang,F Le Diberder,G Batignani,G Raven,T J Harrison,R J Wilson,D Kirkby,D Fortin,L Li Gioi,R Barate,R Cenci,K A Ulmer,J L Ritchie,E A Eckhart,S Ricciardi,D P Stoker,L Piemontese,T W Beck,J E Sundermann,Y Karyotakis,M Pripstein,R F Schwitters,K T Flood,P J Clark,A I Robertson,A J Lankford,C A Chavez,A M Eichenbaum,M Wittgen,D A Hopkins,E Di Marco,H U Flaecher,D Su,B Stugu,T S Mattison,S J Sekula,M Pelizaeus,E Chen,A V Telnov,R Kowalewski,M Haire,H Nicholson,M R Convery,M T Allen,W Gradl,D A Bowerman,W Menges,G Cavoto,R Baldini-Ferroli,C Voci,E I Rosenberg,D W G S Leith,M Piccolo,M D Sokoloff,G Calderini,P E Kutter,J I Yi,E Latour,T Schalk,M Legendre,M S Alam,P J Oddone,A Oyanguren,G Mancinelli,P M Patel,V P Druzhinin,M Davier,C M Brown,W S Lockman,M Pappagallo,N R Barlow,G Cibinetto,A D Bukin,W Dunwoodie,R Prepost,R Gamet,K Honscheid,M Benayoun,M Rama,A M Boyarski,V Lepeltier,H L Snoek,A Cunha,J G Smith,V Ziegler,F Bianchi,D J Summers,C L Edgar,F Salvatore,A T Watson,S Rodier,A Perazzo,D Boutigny,R H Schindler,A Satpathy,X Chai,A Lazzaro,J Schubert,V Tisserand,H Kagan,G Della Ricca,R K Yamamoto,H B Crawley,B Mayer,G Eigen,E P Solodov,E Charles,R De Sangro,U Egede,M B Nikolich,P Spradlin,S Morganti,P Kyberd,N Arnaud,J Marks,S H Robertson,M Mandelkern,H L Lynch,N D Qi,A Buzzo,Yu G Kolomensky,F C Porter,D Bettoni,A Roodman,M T Ronan,W O Ruddick,M Battaglia,A Petzold,M Spitznagel,M Ebert,E Paoloni,D E Wagoner,F Ferroni,M Krishnamurthy,H Marsiske,W T Ford,G Piredda,F R Wappler,M A Mazzoni,T B Moore,R Sacco,I Eschrich,V Eschenburg,K Suzuki,J Schwiening,W Roethel,R Claus,G P Dubois-Felsmann,L M Mir,P R Burchat,M A Mazur,G Nesom,C Dallapiccola,F Polci,A Dvoretskii,A M Rahimi,F Anulli,L Lanceri,B Spaan,J C Williams,R Bula,S Abachi,G Vasseur,F B Viaud,M Carpinelli,A Santroni,V Eyges,D J Payne,T M Hong,J Dorfan,D Del Re,I 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Eckmann,H R Band,C C Young,U Nauenberg,J Biesiada,N Van Bakel,H Schröder,S Schenk,A Gaidot,A Seiden,S Passaggio,D G Hitlin,V E Blinov,S Pruvot,W T Meyer,S S Hertzbach,A M Eisner,R Bartoldus,E Torrence,A Samuel,C M Hawkes,R Kroeger,M L Kocian,W J Wisniewski,S Ahmed,D B Macfarlane,O Hamon,M Weaver,I M Peruzzi,T Pulliam,S B Zain,B G Fulsom,T Piatenko,V Klose,F Safai Tehrani,M Bruinsma,D Hufnagel,W R Innes,D Judd,B Pan,B Franek,S Prell,F Bucci,F Galeazzi,C Bozzi,R Andreassen,R K Mommsen,J D Richman,R Stroili,J R Fry,J Albert,G De Nardo,G B Mohanty,C J Schilling,R Contri,P Lund,L Wilden,J Ocariz,C Hast,R Capra,J P Coleman,C J Flacco,S Pacetti,M Rotondo,T Held,F Blanc,R Rahmat,G Finocchiaro,N De Groot,M Barrett,G Wormser,M Fritsch,J J Back,J P Burke,S Bettarini,M A Saeed,M Posocco,B C Shen,S L Wu,N B Sinev,G Grosdidier,I Kitayama,G Rong,G Kukartsev,R Nogowski,A Volk,R Calabrese,J M Bauer,M Simard,M Verderi,B Lewandowski,R S Dubitzky,A Calcaterra,J Chauveau,I J Forster,L Vitale,A Petrella,A K 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doi:10.1103/physrevd.73.112004

Abstract

We present measurements of the branching fractions and charge asymmetries of B decays to all D(*)D(*) modes. Using 232 million BBbar pairs recorded on the Upsilon(4S) resonance by the BaBar detector at the e+e- asymmetric B factory PEP-II at the Stanford Linear Accelerator Center, we measure the branching fractions BF(B0 -> D*+D*-) = (8.1 +- 0.6 +- 1.0) x 10^-4, BF(B0 -> D*+-D-+) = (5.7 +- 0.7 +- 0.7) x 10^-4, BF(B0 -> D+D-) = (2.8 +- 0.4 +- 0.5) x 10^-4, BF(B+ -> D*+D*0) = (8.1 +- 1.2 +- 1.2) x 10^-4, BF(B+ -> D*+D0) = (3.6 +- 0.5 +- 0.4) x 10^-4, BF(B+ -> D+D*0) = (6.3 +- 1.4 +- 1.0) x 10^-4, and BF(B+ -> D+D0) = (3.8 +- 0.6 +- 0.5) x 10^-4, where in each case the first uncertainty is statistical and the second systematic. We also determine the limits BF(B0 -> D*0D*0) < 0.9 x 10^-4, BF(B0 -> D*0D0) < 2.9 x 10^-4, and BF(B0 -> D0D0) < 0.6 x 10^-4, each at 90% confidence level. All decays above denote either member of a charge conjugate pair. We also determine the CP-violating charge asymmetries A(B0 -> D*+-D-+) = 0.03 +- 0.10 +- 0.02, A(B+ -> D*+D*0) = -0.15 +- 0.11 +- 0.02, A(B+ -> D*+D0) = -0.06 +- 0.13 +- 0.02, A(B+ -> D*+D*0) = 0.13 +- 0.18 +- 0.04, and A(B+ -> D+D0) = -0.13 +- 0.14 +- 0.02. Additionally, when we combine these results with information from time-dependent CP asymmetries in B0 -> D*+D*- decays and world-averaged branching fractions of B decays to Ds(*)D(*) modes, we find the CKM phase gamma is favored to lie in the range [0.07-2.77] radians (with a +0 or +pi radians ambiguity) at 68% confidence level.

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