Measurement of $|V_{cb}|$, form factors and branching fractions in the decays $\overline{B}^0 \to D^{*+}l^- \overline{\nu}_l$ and $\overline{B}^0 \to D^{+}l^{-}\overline{\nu}_l$

Two samples of exclusive semileptonic decays, 579 B0->D*+l-nu events and 261 B0->D+l-nu 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...

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Detalles Bibliográficos
Autores principales: Buskulic, Damir, De Bonis, I, Décamp, D, Ghez, P, Goy, C, Lees, J P, Lucotte, A, Minard, M N, Nief, J Y, Odier, P, Pietrzyk, B, Casado, M P, Chmeissani, M, Comas, P, Crespo, J M, Delfino, M C, Efthymiopoulos, I, Fernández, E, Fernández-Bosman, M, Garrido, L, Juste, A, Martínez, M, Orteu, S, Padilla, C, Park, I C, Pascual, A, Perlas, J A, Riu, I, Sánchez, F, Teubert, F, Colaleo, A, Creanza, D, De Palma, M, Gelao, G, Girone, M, Iaselli, Giuseppe, Maggi, G, Maggi, M, Marinelli, N, Nuzzo, S, Ranieri, A, Raso, G, Ruggieri, F, Selvaggi, G, Silvestris, L, Tempesta, P, Tricomi, A, Zito, G, Huang, X, Lin, J, Ouyang, Q, Wang, T, Xie, Y, Xu, R, Xue, S, Zhang, J, Zhang, L, Zhao, W, Abbaneo, D, Alemany, R, Bazarko, A O, Bright-Thomas, P G, Cattaneo, M, Cerutti, F, Coyle, P, Drevermann, H, Forty, Roger W, Frank, M, Hagelberg, R, Harvey, J, Janot, P, Jost, B, Kneringer, E, Knobloch, J, Lehraus, Ivan, Lutters, G, Mato, P, Minten, Adolf G, Miquel, R, Mir, L M, Moneta, L, Oest, T, Pacheco, A, Pusztaszeri, J F, Ranjard, F, Rensing, P E, Rizzo, G, Rolandi, Luigi, Schlatter, W D, Schmelling, M, Schmitt, M, Schneider, O, Tejessy, W, Tomalin, I R, Venturi, A, Wachsmuth, H W, Wagner, A, Ajaltouni, Ziad J, Barrès, A, Boyer, C, Falvard, A, Gay, P, Guicheney, C, Henrard, P, Jousset, J, Michel, B, Monteil, S, Montret, J C, Pallin, D, Perret, P, Podlyski, F, Proriol, J, Rosnet, P, Rossignol, J M, Fearnley, Tom, Hansen, J B, Hansen, J D, Hansen, J R, Hansen, P H, Nilsson, B S, Rensch, B, Wäänänen, A, Kyriakis, A, Markou, C, Simopoulou, Errietta, Siotis, I, Vayaki, Anna, Zachariadou, K, Blondel, A, Bonneaud, G R, Brient, J C, Bourdon, P, Rougé, A, Rumpf, M, Valassi, Andrea, Verderi, M, Videau, H L, Candlin, D J, Parsons, M I, Focardi, E, Parrini, G, Corden, M, Georgiopoulos, C H, Jaffe, D E, Antonelli, A, Bencivenni, G, Bologna, G, Bossi, F, Campana, P, Capon, G, Casper, David William, Chiarella, V, Felici, G, Laurelli, P, Mannocchi, G, Murtas, F, Murtas, G P, Passalacqua, L, Pepé-Altarelli, M, Curtis, L, Dorris, S J, Halley, A W, Knowles, I G, Lynch, J G, O'Shea, V, Raine, C, Scarr, J M, Smith, K, Teixeira-Dias, P, Thompson, A S, Thomson, E, Thomson, F, Turnbull, R M, Becker, U, Geweniger, C, Graefe, G, Hanke, P, Hansper, G, Hepp, V, Kluge, E E, Putzer, A, Schmidt, M, Sommer, J, Tittel, K, Werner, S, Wunsch, M, Beuselinck, R, Binnie, David M, Cameron, W, Dornan, Peter J, Martin, E B, Moutoussi, A, Nash, J, Sedgbeer, J K, Stacey, A M, Williams, M D, Dissertori, G, Girtler, P, Kuhn, D, Rudolph, G, Betteridge, A P, Bowdery, C K, Colrain, P, Crawford, G, Finch, A J, Foster, F, Hughes, G, Sloan, Terence, Williams, M I, Galla, A, Giehl, I, Greene, A M, Hoffmann, C, Jakobs, K, Kleinknecht, K, Quast, G, Renk, B, Rohne, E, Sander, H G, Van Gemmeren, P, Zeitnitz, C, Aubert, Jean-Jacques, Bencheikh, A M, Benchouk, C, Bonissent, A, Bujosa, G, Calvet, D, Carr, J, Diaconu, C A, Etienne, F, Konstantinidis, N P, Payre, P, Rousseau, D, Talby, M, Sadouki, A, Thulasidas, M, Trabelsi, K, Aleppo, M, Ragusa, F, Berlich, R, Blum, Walter, Büscher, V, Dietl, H, Dydak, Friedrich, Ganis, G, Gotzhein, C, Kroha, H, Lütjens, G, Lutz, Gerhard, Männer, W, Moser, H G, Richter, R H, Rosado-Schlosser, A, Schael, S, Settles, Ronald, Seywerd, H C J, Saint-Denis, R, Stenzel, H, Wiedenmann, W, Wolf, G, Boucrot, J, Callot, O, Choi, Y, Cordier, A, Davier, M, Duflot, L, Grivaz, J F, Heusse, P, Höcker, A, Jacholkowska, A, Jacquet, M, Kim, D W, Le Diberder, F R, Lefrançois, J, Lutz, A M, Nikolic, I A, Park, H J, Schune, M H, Simion, S, Veillet, J J, Videau, I, Zerwas, D, Azzurri, P, Bagliesi, G, Batignani, G, Bettarini, S, Bozzi, C, Calderini, G, Carpinelli, M, Ciocci, M A, Ciulli, V, Dell'Orso, R, Fantechi, R, Ferrante, I, Foà, L, Forti, F, Giassi, A, Giorgi, M A, Gregorio, A, Ligabue, F, Lusiani, A, Marrocchesi, P S, Messineo, A, Palla, Fabrizio, Sanguinetti, G, Sciabà, A, Spagnolo, P, Steinberger, Jack, Tenchini, Roberto, Tonelli, G, Vannini, C, Verdini, P G, Blair, G A, Bryant, L M, Chambers, J T, Gao, Y, Green, M G, Medcalf, T, Perrodo, P, Strong, J A, Von Wimmersperg-Töller, J H, Botterill, David R, Clifft, R W, Edgecock, T R, Haywood, S, Maley, P, Norton, P R, Thompson, J C, Wright, A E, Bloch-Devaux, B, Colas, P, Emery, S, Kozanecki, Witold, Lançon, E, Lemaire, M C, Locci, E, Pérez, P, Rander, J, Renardy, J F, Roussarie, A, Schuller, J P, Schwindling, J, Trabelsi, A, Vallage, B, Black, S N, Dann, J H, Johnson, R P, Kim, H Y, Litke, A M, McNeil, M A, Taylor, G, Booth, C N, Boswell, R, Brew, C A J, Cartwright, S L, Combley, F, Köksal, A, Lehto, M H, Newton, W M, Reeve, J, Thompson, L F, Böhrer, A, Brandt, S, Cowan, G D, Grupen, Claus, Minguet-Rodríguez, J A, Rivera, F, Saraiva, P, Smolik, L, Stephan, F, Apollonio, M, Bosisio, L, Della Marina, R, Giannini, G, Gobbo, B, Musolino, G, Rothberg, J E, Wasserbaech, S R, Armstrong, S R, Elmer, P, Feng, Z, Ferguson, D P S, Gao, Y S, González, S, Grahl, J, Greening, T C, Hayes, O J, Hu, H, McNamara, P A, Nachtman, J M, Orejudos, W, Pan, Y B, Saadi, Y, Scott, I J, Walsh, A M, Walsh, J, Wu Sau Lan, Wu, X, Yamartino, J M, Zheng, M, Zobernig, G
Lenguaje:eng
Publicado: 1996
Materias:
Particle Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1016/S0370-2693(97)00071-3
http://cds.cern.ch/record/314389
Descripción
Sumario:Two samples of exclusive semileptonic decays, 579 B0->D*+l-nu events and 261 B0->D+l-nu 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(w) at zero recoil of the D(*)+ meson and the CKM matrix element |Vcb| are measured to be FD*+(1)|Vcb| = (31.9 +/- 1.8(stat) +/- 1.9(syst) ) Mail afs archive asis auth bin boot categ cern collab comments core date dev drdspool etc export external_repno filename ftp home kadb lib lost+found mail mbox mnt nfs nsr old_archive old_drdspool old_pub opt pages pcfs pub publi publitype reconfigure ref repno sbin share sys tit tmp usr var vmunix 10**-3, FD+(1)|Vcb| = (27.8 +/- 6.8(stat) +/- 6.5(syst) ) Mail afs archive asis auth bin boot categ cern collab comments core date dev drdspool etc export external_repno filename ftp home kadb lib lost+found mail mbox mnt nfs nsr old_archive old_drdspool old_pub opt pages pcfs pub publi publitype reconfigure ref repno sbin share sys tit tmp usr var vmunix 10**-3. The ratio of the form factors FD+(1) and FD*+(1) is measured to be FD+(1)/FD*+(1) = 0.87 +/- 0.22(stat) +/- 0.21(syst). 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 +/- 1.6(stat) +/- 2.3(syst) +/- 1.4(th) ) Mail afs archive asis auth bin boot categ cern collab comments core date dev drdspool etc export external_repno filename ftp home kadb lib lost+found mail mbox mnt nfs nsr old_archive old_drdspool old_pub opt pages pcfs pub publi publitype reconfigure ref repno sbin share sys tit tmp usr var vmunix 10**-3. The branching fractions are measured from the two integrated spectra to be Br(B0->D*+l-nu) = (5.53 +/- 0.26(stat) +/- 0.52(syst)) % , Br(B0->D+l-nu) = (2.35 +/- 0.20(stat) +/- 0.44(syst)) %.

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