Measurements of |Vcb|, form factors and branching fractions in the decays → ℓ and → ℓ

6533b85afe1ef96bd12b9861

RESEARCH PRODUCT

Measurements of |Vcb|, form factors and branching fractions in the decays → ℓ and → ℓ

D. Buskulic I. De Bonis D. Decamp P. Ghez C. Goy J.-p. Lees A. Lucotte M.-n. Minard J.-y. Nief P. Odier B. Pietrzyk M.p. Casado M. Chmeissani P. Comas J.m. Crespo M. Delfino I. Efthymiopoulos E. Fernandez M. Fernandez-bosman Ll. Garrido A. Juste M. Martinez S. Orteu C. Padilla I.c. Park A. Pascual J.a. Perlas I. Riu F. Sanchez F. Teubert A. Colaleo D. Creanza M. De Palma G. Gelao M. Girone G. Iaselli G. Maggi M. Maggi N. Marinelli S. Nuzzo A. Ranieri G. Raso F. Ruggieri G. Selvaggi L. Silvestris P. Tempesta A. Tricomi G. Zito X. Huang J. Lin Q. Ouyang T. Wang Y. Xie R. Xu S. Xue J. Zhang L. Zhang W. Zhao D. Abbaneo R. Alemany A.o. Bazarko P. Bright-thomas M. Cattaneo F. Cerutti P. Coyle H. Drevermann R.w. Forty M. Frank R. Hagelberg J. Harvey P. Janot B. Jost E. Kneringer J. Knobloch I. Lehraus G. Lutters P. Mato A. Minten R. Miquel Ll.m. Mir L. Moneta T. Oest A. Pacheco J.-f. Pusztaszeri F. Ranjard P. Rensing G. Rizzo L. Rolandi D. Schlatter M. Schmelling M. Schmitt O. Schneider W. Tejessy I.r. Tomalin A. Venturi H. Wachsmuth A. Wagner Z. Ajaltouni A. Barrès C. Boyer A. Falvard P. Gay C. Guicheney P. Henrard J. Jousset B. Michel S. Monteil J-c. Montret D. Pallin P. Perret F. Podlyski J. Proriol P. Rosnet J.-m. Rossignol T. Fearnley J.b. Hansen J.d. Hansen J.r. Hansen P.h. Hansen B.s. Nilsson B. Rensch A. Wäänänen A. Kyriakis C. Markou E. Simopoulou I. Siotis A. Vayaki K. Zachariadou A. Blondel G. Bonneaud J.c. Brient P. Bourdon A. Rougé M. Rumpf A. Valassi M. Verderi H. Videau D.j. Candlin M.i. Parsons E. Focardi G. Parrini M. Corden C. Georgiopoulos D.e. Jaffe A. Antonelli G. Bencivenni G. Bologna F. Bossi P. Campana G. Capon D. Casper V. Chiarella G. Felici P. Laurelli G. Mannocchi F. Murtas G.p. Murtas L. Passalacqua M. Pepe-altarelli L. Curtis S.j. Dorris A.w. Halley I.g. Knowles J.g. Lynch V. O'shea C. Raine J.m. Scarr K. Smith P. Teixeira-dias A.s. Thompson E. Thomson F. Thomson R.m. Turnbull U. Becker C. Geweniger G. Graefe P. Hanke G. Hansper V. Hepp E.e. Kluge A. Putzer M. Schmidt J. Schmer H. Stenzel K. Tittel S. Werner M. Wunsch R. Beuselinck D.m. Binnie W. Cameron P.j. Dornan E.b. Martin A. Moutoussi J. Nash J.k. Sedgbeer A.m. Stacey M.d. Williams G. Dissertori P. Girtler D. Kuhn G. Rudolph A.p. Betteridge C.k. Bowdery P. Colrain G. Crawford A.j. Finch F. Foster G. Hughes T. Sloan M.i. Williams A. Galla I. Giehl A.m. Greene C. Hoffmann K. Jakobs K. Kleinknecht G. Quast B. Renk E. Rohne H.-g. Sander P. Van Gemmeren C. Zeitnitz J.j. Aubert A.m. Bencheikh C. Benchouk A. Bonissent G. Bujosa D. Calvet J. Carr C. Diaconu F. Etienne N. Konstantinidis P. Payre D. Rousseau M. Talby A. Sadouki M. Thulasidas K. Trabelsi M. Aleppo F. Ragusa R. Berlich W. Blum V. Büscher H. Dietl F. Dydak G. Ganis C. Gotzhein H. Kroha G. Lütjens G. Lutz W. Männer H.-g. Moser R. Richter A. Rosado-schlosser S. Schael R. Settles H. Seywerd R.st. Denis H. Stenzel W. Wiedenmann G. Wolf J. Boucrot O. Callot Y. Choi A. Cordier M. Davier L. Duflot J.-f. Grivaz Ph. Heusse A. Höcker A. Jacholkowska M. Jacquet D.w. Kim F. Le Diberder J. Lefrançois A.-m. Lutz I. Nikolic H.j. Park M.-h. Schune S. Simion J.-j. Veillet I. Videau D. Zerwas P. Azzurri G. Bagliesi G. Batignani S. Bettarini C. Bozzi G. Calderini M. Carpinelli M.a. Ciocci V. Ciulli R. Dell'orso R. Fantechi I. Ferrante L. Foà F. Forti A. Giassi M.a. Giorgi A. Gregorio F. Ligabue A. Lusiani P.s. Marrocchesi A. Messineo F. Palla G. Sanguinetti A. Sciabà P. Spagnolo J. Steinberger R. Tenchini G. Tonelli C. Vannini P.g. Verdini G.a. Blair L.m. Bryant J.t. Chambers Y. Gao M.g. Green T. Medcalf P. Perrodo J.a. Strong J.h. Von Wimmersperg-toeller D.r. Botterill R.w. Clifft T.r. Edgecock S. Haywood P. Maley P.r. Norton J.c. Thompson A.e. Wright B. Bloch-devaux P. Colas S. Emery W. Kozanecki E. Lançon M.c. Lemaire E. Locci P. Perez J. Rander J.-f. Renardy A. Roussarie J.-p. Schuller J. Schwindling A. Trabelsi B. Vallage S.n. Black J.h. Dann R.p. Johnson H.y. Kim A.m. Litke M.a. Mcneil G. Taylor C.n. Booth R. Boswell C.a.j. Brew S. Cartwright F. Combley A. Koksal M. Letho W.m. Newton J. Reeve L.f. Thompson A. Böhrer S. Brandt G. Cowan C. Grupen J. Minguet-rodriguez F. Rivera P. Saraiva L. Smolik F. Stephan M. Apollonio L. Bosisio R. Della Marina G. Giannini B. Gobbo G. Musolino J. Rothberg S. Wasserbaech S.r. Armstrong P. Elmer Z. Feng D.p.s. Ferguson Y.s. Gao S. González J. Grahl T.c. Greening O.j. Hayes H. Hu P.a. Mcnamara J.m. Nachtman W. Orejudos Y.b. Pan Y. Saadi I.j. Scott A.m. Walsh J. Walsh Sau Lan Wu X. Wu J.m. Yamartino M. Zheng G. Zobernig

subject

Physics Nuclear and High Energy Physics Particle physics Meson Cabibbo–Kobayashi–Maskawa matrix Electron–positron annihilation High Energy Physics::Phenomenology Hadron Curvature Spectral line ALEPH Experiment Recoil High Energy Physics::Experiment Atomic physics ALEPH experiment

description

Two samples of exclusive semileptonic decays, 579 B0 -> D*+l-νl events and 261 B0 -> D+l-νl events, are selected from approximately 3.9 million hadronic Z decays collected by the ALEPH detector at LEP. From the reconstructed differential decay rate of each sample, the product of the hadronic form factor F(ω) at zero recoil of the D(*)+ meson and the CKM matrix element Vcb are measured to be FD*+ (1) Vcb = (31.9 +/- 1.8stat +/- 1.9syst) × 10-3,FD+ (1) Vcb = (27.8 +/- 6.8stat +/- 6.5syst) × 10-3. The ratio of the form factorsFD+ (1) and FD*+ (1) is measured to beFD+ (1)/FD*+ (1) = 0.87 +/- 0.22stat +/- 0.21syst. A value of Vcb is extracted from the two samples, using theoretical constraints on the slope and curvature of the hadronic form factors and their normalization at zero recoil, with the result Vcb = (34.4 +/- 1.6stat +/- 2.3syst +/- 1.4th) × 10-3. The branching fractions are measured from the two integrated spectra to be Br(B0 -> D*+l-νl) = (5.53 +/- 0.26stat +/- 0.52syst) %, Br(B0 -> D+l-νl) = (2.35 +/- 0.20stat +/- 0.44syst) %.

year	journal	country	edition	language
1997-03-01	Physics Letters B

https://doi.org/10.1016/s0370-2693(97)00071-3