Search for Bbar to Lambda_c+ X L- Nu Decays in Events with a Fully Reconstructed B Meson

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,L. Sun,D. N. Brown,L. T. Kerth,Yu. G. Kolomensky,G. Lynch,T. Tanabe,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,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,L. Piemontese,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,S. Paramesvaran,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,V. Santoro,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,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,T. J. Gershon,P. F. Harrison,T. E. Latham,E. M. T. Puccio,H. R. Band,S. Dasu,Y. Pan, R. Prepost,C. O. Vuosalo,S. L. Wu

PHYSICAL REVIEW D（2012）

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摘要

We present a search for semileptonic B decays to the charmed baryon {Lambda}{sub c}{sup +} based on 420 fb{sup -1} of data collected at the {Upsilon}(4S) resonance with the BABAR detector at the PEP-II e{sup +}e{sup -} storage rings. By fully reconstructing the recoiling B in a hadronic decay mode, we reduce non-B backgrounds and determine the flavor of the signal B. We statistically correct the flavor for the effect of the B{sup 0} mixing. We obtain a 90% confidence level upper limit of {Beta}({bar B} {yields} {Lambda}{sub c}{sup +} X{ell}{sup -} {bar {nu}}{sub {ell}})/{Beta}({bar B} {yields} {Lambda}{sub c}{sup +} X) < 3.5%.

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