Measurement of V cb from the decay process B̄ 0 → D ∗ + l − ν̄
W. Adam,T. Adye,P. Adzic,Z. Albrecht,T. Alderweireld,G. D. Alekseev,R. Alemany,T. Allmendinger,P. P. Allport, S. Almehed,U. Amaldi,N. Amapane,S. Amato,E. G. Anassontzis,P. Andersson,A. Andreazza,S. Andringa,P. Antilogus,W-D. Apel, Y. Arnoud,B. Åsman,J-E. Augustin,A. Augustinus, P. Baillon,A. Ballestrero,P. Bambade,F. Barao,G. Barbiellini,R. Barbier,D. Y. Bardin,G. Barker,A. Baroncelli,M. Battaglia,M. Baubillier,K-H. Becks,M. Begalli,A. Behrmann,P. Beilliere,Yu. Belokopytov,K. Belous,N. C. Benekos,A. C. Benvenuti,C. Berat,M. Berggren,L. Berntzon,D. Bertrand,M. Besancon,M. S. Bilenky,M-A. Bizouard,D. Bloch,H. M. Blom,M. Bonesini,M. Boonekamp,P. S. L. Booth,G. Borisov,C. Bosio,O. Botner,E. Boudinov,B. Bouquet,C. Bourdarios,T. J. V. Bowcock,I. Boyko,I. Bozovic,M. Bozzo,M. Bracko,P. Branchini, R. A. Brenner,P. Bruckman,J-M. Brunet,L. Bugge, T. Buran,B. Buschbeck,P. Buschmann,S. Cabrera,M. Caccia,M. Calvi,T. Camporesi,V. Canale,F. Carena,L. Carroll,C. Caso,M. V. Castillo Gimenez,A. Cattai,F. R. Cavallo,M. Chapkin,Ph. Charpentier,P. Checchia,G. A. Chelkov,R. Chierici,P. Chliapnikov,P. Chochula,V. Chorowicz,J. Chudoba,K. Cieslik,P. Collins,R. Contri,E. Cortina,G. Cosme,F. Cossutti,M. Costa,H. B. Crawley,D. Crennell,S. Crepe,G. Crosetti,J. Cuevas Maestro, S. Czellar,J. D’Hondt,J. Dalmau,M. Davenport,W. Da Silva,G. Della Ricca,P. Delpierre,N. Demaria,A. De Angelis,W. De Boer,C. De Clercq, B. De Lotto,A. De Min,L. De Paula,H. Dijkstra,L. Di Ciaccio,J. Dolbeau, K. Doroba,M. Dracos,J. Drees,M. Dris,A. Duperrin,G. Eigen,T. Ekelof,M. Ellert,M. Elsing,J-P. Engel,M. Espirito Santo,G. Fanourakis,D. Fassouliotis,M. Feindt, J. Fernandez,A. Ferrer,E. Ferrer-Ribas,F. Ferro,A. Firestone,U. Flagmeyer,H. Foeth,E. Fokitis,F. Fontanelli,B. Franek,A. G. Frodesen,R. Fruhwirth,F. Fulda-Quenzer,J. Fuster,A. Galloni,D. Gamba,S. Gamblin,M. Gandelman,C. Garcia,C. Gaspar,M. Gaspar,U. Gasparini,Ph. Gavillet,E. N. Gazis,D. Gele,T. Geralis,N. Ghodbane,I. Gil, F. Glege,R. Gokieli,B. Golob,G. 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Peralta,M. Pernicka,A. Perrotta,C. Petridou,A. Petrolini,H. T. Phillips,F. Pierre,M. Pimenta,E. Piotto,T. Podobnik,V. Poireau,G. Polok,P. Poropat,V. Pozdniakov,P. Privitera,N. Pukhaeva,A. Pullia,D. Radojicic,S. Ragazzi,H. Rahmani,J. Rames,P. N. Ratoff,M. Regler,J. Rehn,P. Reinertsen,R. Reinhardt,L. K. Resvanis,F. Richard,J. Ridky,G. Rinaudo,O. Rohne,A. Romero,P. Ronchese,P. Rosinsky,P. Roudeau,T. Rovelli,A. Ruiz,H. Saarikko,Y. Sacquin,A. Sadovsky, G. Sajot,J. Salt,D. Sampsonidis, M. Sannino,Ph. Schwemling,B. Schwering,U. Schwickerath, F. Scuri,P. Seager,Y. Sedykh,N. Seibert,R. Sekulin,G. Sette,L. Simard,F. Simonetto,A. N. Sisakian,G. Smadja,O. Smirnova,G. R. Smith,O. Solovianov,A. Sopczak,R. Sosnowski,T. Spassov,E. Spiriti,S. Squarcia,C. Stanescu, M. Stanitzki,K. Stevenson,A. Stocchi,J. Strauss,R. Strub,B. Stugu,M. Szczekowski,M. Szeptycka,A. Taffard,F. Tegenfeldt,F. Terranova,J. Timmermans,N. Tinti,L. G. Tkatchev,M. Tobin,S. Todorova,B. Tome,A. Tonazzo,L. Tortora,P. Tortosa, G. Transtromer, D. Treille,G. Tristram,M. Trochimczuk,C. Troncon,M-L. Turluer,I. A. Tyapkin,P. Tyapkin, S. Tzamarias,O. Ullaland,V. Uvarov,G. Valenti,E. Vallazza,W. Van den Boeck,W. K. Van Doninck,J. Van Eldik
semanticscholar（2008）
Cited 0|Views17
Abstract
A new precise measurement of |Vcb| and of the branching ratio BR(B̄0 → Dlν̄l) has been performed using a sample of about 5000 semileptonic decays B̄0 → Dlν̄l, selected by the DELPHI detector at LEP I by tagging the soft pion from D → Dπ. The results are: Vcb = (39.0 ± 1.5 (stat.) +2.5 −2.6 (syst. exp.) ± 1.3 (syst. th.)) × 10 BR(B̄0 → Dlν̄l) = (4.70 ± 0.13 (stat.) +0.36 −0.31 (syst. exp.))% The analytic dependences of the differential cross-section and of the Isgur Wise form factor as functions of the variable w = vB0 · vD∗ have also been obtained by unfolding the experimental resolution. (Accepted by Phys.Lett.B)
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