Study Of (B)Over-Bar -> X(U)L(V)Over-Bar Decays In B(B)Over-Bar Events Tagged By A Fully Reconstructed B-Meson Decay And Determination Of Vertical Bar V-Ub Vertical Bar
J. P. Lees,V. Poireau,V. Tisserand,J. Garra Tico,E. Grauges,M. Martinelli,D. A. Milanes,A. Palano,M. Pappagallo,G. Eigen,B. Stugu,D. N. Brown,L. T. Kerth,Yu G. Kolomensky,G. Lynch,K. Tackmann,H. Koch,T. Schroeder,D. J. Asgeirsson,C. Hearty,T. S. Mattison,J. A. Mckenna,A. Khan,V. E. Blinov,A. R. Buzykaev,V. P. Druzhinin,V. B. Golubev,E. A. Kravchenko,A. P. Onuchin,S. I. Serednyakov,Yu I. Skovpen,E. P. Solodov,K. Yu Todyshev,A. N. Yushkov,M. Bondioli,D. Kirkby,A. J. Lankford,M. Mandelkern,D. P. Stoker,H. Atmacan,J. W. Gary,F. Liu,O. Long,G. M. Vitug,C. Campagnari,T. M. Hong,D. Kovalskyi,J. D. Richman,C. A. West,A. M. Eisner,J. Kroseberg,W. S. Lockman,A. J. Martinez,T. Schalk,B. A. Schumm,A. Seiden,C. H. Cheng,D. A. Doll,B. Echenard,K. T. Flood,D. G. Hitlin,P. Ongmongkolkul,F. C. Porter,A. Y. Rakitin,R. Andreassen,M. S. Dubrovin,Z. Huard,B. T. Meadows,M. D. Sokoloff,L. Sun,P. C. Bloom,W. T. Ford,A. Gaz,M. Nagel,U. Nauenberg,J. G. Smith,S. R. Wagner,R. Ayad,W. H. Toki,B. Spaan,M. J. Kobel,K. R. Schubert,R. Schwierz,D. Bernard,M. Verderi,P. J. Clark,S. Playfer,D. Bettoni,C. Bozzi,R. Calabrese,G. Cibinetto,E. Fioravanti,I. Garzia,E. Luppi,M. Munerato,M. Negrini,A. Petrella,L. Piemontese,V. Santoro,R. Baldini-Ferroli,A. Calcaterra,R. De Sangro,G. Finocchiaro,M. Nicolaci,P. Patteri,I. M. Peruzzi,M. Piccolo,M. Rama,A. Zallo,R. Contri,E. Guido,M. Lo Vetere,M. R. Monge,S. Passaggio,C. Patrignani,E. Robutti,B. Bhuyan,V. Prasad,C. L. Lee,M. Morii,A. J. Edwards,A. Adametz,J. Marks,U. Uwer,F. U. Bernlochner,M. Ebert,H. M. Lacker,T. Lueck,P. D. Dauncey,M. Tibbetts,P. K. Behera,U. Mallik,C. Chen,J. Cochran,W. T. Meyer,S. Prell,E. I. Rosenberg,A. E. Rubin,A. V. Gritsan,Z. J. Guo,N. Arnaud,M. Davier,G. Grosdidier,F. Le Diberder,A. M. Lutz,B. Malaescu,P. Roudeau,M. H. Schune,A. Stocchi,G. Wormser,D. J. Lange,D. M. Wright,I. Bingham,C. A. Chavez,J. P. Coleman,J. R. Fry,E. Gabathuler,D. E. Hutchcroft,D. J. Payne,C. Touramanis,A. J. Bevan,F. Di Lodovico,R. Sacco,M. Sigamani,G. Cowan,D. N. Brown,C. L. Davis,A. G. Denig,M. Fritsch,W. Gradl,A. Hafner,E. Prencipe,K. E. Alwyn,D. Bailey,R. J. Barlow,G. Jackson,G. D. Lafferty,R. Cenci,B. Hamilton,A. Jawahery,D. A. Roberts,G. Simi,C. Dallapiccola,R. Cowan,D. Dujmic,G. Sciolla,D. Lindemann,P. M. Patel,S. H. Robertson,M. Schram,P. Biassoni,A. Lazzaro,V. Lombardo,N. Neri,F. Palombo,S. Stracka,L. Cremaldi,R. Godang,R. Kroeger,P. Sonnek,D. J. Summers,X. Nguyen,P. Taras,G. De Nardo,D. Monorchio,G. Onorato,C. Sciacca,G. Raven,H. L. Snoek,C. P. Jessop,K. J. Knoepfel,J. M. Losecco,W. F. Wang,K. Honscheid,R. Kass,J. Brau,R. Frey,N. B. Sinev,D. Strom,E. Torrence,E. Feltresi,N. Gagliardi,M. Margoni,M. Morandin,M. Posocco,M. Rotondo,F. Simonetto,R. Stroili,E. Ben-Haim,M. Bomben,G. R. Bonneaud,H. Briand,G. Calderini,J. Chauveau,O. Hamon,Ph Leruste,G. Marchiori,J. Ocariz,S. Sitt,M. Biasini,E. Manoni,S. Pacetti,A. Rossi,C. Angelini,G. Batignani,S. Bettarini,M. Carpinelli,G. Casarosa,A. Cervelli,F. Forti,M. A. Giorgi,A. Lusiani,B. Oberhof,E. Paoloni,A. Perez,G. Rizzo,J. J. Walsh,D. Lopes Pegna,C. Lu,J. Olsen,A. J. S. Smith,A. V. Telnov,F. Anulli,G. Cavoto,R. Faccini,F. Ferrarotto,F. Ferroni,M. Gaspero,L. Li Gioi,M. A. Mazzoni,G. Piredda,C. Buenger,O. Gruenberg,T. Hartmann,T. Leddig,H. Schroeder,R. Waldi,T. Adye,E. O. Olaiya,F. F. Wilson,S. Emery,G. Hamel De Monchenault,G. Vasseur,Ch Yeche,D. Aston,D. J. Bard,R. Bartoldus,C. Cartaro,M. R. Convery,J. Dorfan,G. P. Dubois-Felsmann,W. Dunwoodie,R. C. Field,M. Franco Sevilla,B. G. Fulsom,A. M. Gabareen,M. T. Graham,P. Grenier,C. Hast,W. R. Innes,M. H. Kelsey,H. Kim,P. Kim,M. L. Kocian,D. W. G. S. Leith,P. Lewis,S. Li,B. Lindquist,S. Luitz,V. Luth,H. L. Lynch,D. B. Macfarlane,D. R. Muller,H. Neal,S. Nelson,I. Ofte,M. Perl,T. Pulliam,B. N. Ratcliff,A. Roodman,A. A. Salnikov,R. H. Schindler,A. Snyder,D. Su,M. K. Sullivan,J. Va'Vra,A. P. Wagner,M. Weaver,W. J. Wisniewski,M. Wittgen,D. H. Wright,H. W. Wulsin,A. K. Yarritu,C. C. Young,V. Ziegler,W. Park,M. V. Purohit,R. M. White,J. R. Wilson,A. Randle-Conde,S. J. Sekula,M. Bellis,J. F. Benitez,P. R. Burchat,T. S. Miyashita,M. S. Alam,J. A. Ernst,R. Gorodeisky,N. Guttman,D. R. Peimer,A. Soffer,P. Lund,S. M. Spanier,R. Eckmann,J. L. Ritchie,A. M. Ruland,C. J. Schilling,R. F. Schwitters,B. C. Wray,J. M. Izen,X. C. Lou,F. Bianchi,D. Gamba,L. Lanceri,L. Vitale,V. Azzolini,F. Martinez-Vidal,A. Oyanguren,H. Ahmed,J. Albert,Sw Banerjee,H. H. F. Choi,G. J. King,R. Kowalewski,M. J. Lewczuk,C. Lindsay,I. M. Nugent,J. M. Roney,R. J. Sobie,N. Tasneem,T. J. Gershon,P. F. Harrison,T. E. Latham,E. M. T. Puccio,H. R. Band,S. Dasu,Y. Pan,R. Prepost,S. L. Wu
PHYSICAL REVIEW D（2012）
引用30|浏览48
暂无评分
摘要
We report measurements of partial branching fractions for inclusive charmless semileptonic B decays (B) over bar -> X(u)l (v) over bar and the determination of the Cabibbo-Kobayashi-Maskawa (CKM) matrix element vertical bar V-ub vertical bar. The analysis is based on a sample of 467 x 10(6) Y(4S) -> B (B) over bar decays recorded with the BABAR detector at the PEP- II e(+)e(-) storage rings. We select events in which the decay of one of the B mesons is fully reconstructed and an electron or a muon signals the semileptonic decay of the other B meson. We measure partial branching fractions Delta B in several restricted regions of phase space and determine the CKM element vertical bar V-ub vertical bar based on different QCD predictions. For decays with a charged lepton momentum p(l)* > 1.0 GeV in the B meson rest frame, we obtain Delta B = (1.80 +/- 0.13(stat) +/- 0.15(sys) +/- 0.02(theo)) x 10(-3) from a fit to the two-dimensional M-X - q(2) distribution. Here, M-X refers to the invariant mass of the final state hadron X and q(2) is the invariant mass squared of the charged lepton and neutrino. From this measurement we extract vertical bar V-ub vertical bar = (4.33 +/- 0.24(exp) +/- 0.15(theo)) x 10(-3) as the arithmetic average of four results obtained from four different QCD predictions of the partial rate. We separately determine partial branching fractions for (B) over bar (0) and B- decays and derive a limit on the isospin breaking in (B) over bar -> X(u)l (v) over bar decays.
