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Measurements of vertical bar V-cb vertical bar form factors and branching fractions in the decays (B)over-bar(0)->D(*+)l(-)(nu)over-bar(l) and (B)over-bar(0)->D(+)l(-)(nu)over-bar(l) RID C-6238-2011

Author:
Buskulic, D  DeBonis, I  Decamp, D  Ghez, P  Goy, C  Lees, JP  Lucotte, A  Minard, MN  Nief, JY  Odier, P  Pietrzyk, B  Casado, MP  Chmeissani, M  Comas, P  Crespo, JM  Delfino, M  Efthymiopoulos, I  Fernandez, E  FernandezBosman, M  Garrido, L  Juste, A  Martinez, M  Orteu, S  Padilla, C  Park, IC  Pascual, A  Perlas, JA  Riu, I  Sanchez, F  Teubert, F  Colaleo, A  Creanza, D  dePalma, M  Gelao, G  Girone, M  Iaselli, G  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, AO  BrightThomas, P  Cattaneo, M  Cerutti, F  Coyle, P  Drevermann, H  Forty, RW  Frank, M  Hagelberg, R  Harvey, J  Janot, P  Jost, B  Kneringer, E  Knobloch, J  Lehraus, I  Lutters, G  Mato, P  Minten, A  Miquel, R  Mir, LM  Moneta, L  Oest, T  Pacheco, A  Pusztaszeri, JF  Ranjard, F  Rensing, P  Rizzo, G  Rolandi, L  Schlatter, D  Schmelling, M  Schmitt, M  Schneider, O  Tejessy, W  Tomalin, IR  Venturi, A  Wachsmuth, H  Wagner, A  Ajaltouni, Z  Barres, A  Boyer, C  Falvard, A  Gay, P  Guicheney, C  Henrard, P  Jousset, J  Michel, B  Monteil, S  Montret, JC  Pallin, D  Perret, P  Podlyski, F  Proriol, J  Rosnet, P  Rossignol, JM  Fearnley, T  Hansen, JB  Hansen, JD  Hansen, JR  Hansen, PH  Nilsson, BS  Rensch, B  Waananen, A  Kyriakis, A  Markou, C  Simopoulou, E  Siotis, I  Vayaki, A  Zachariadou, K  Blondel, A  Bonneaud, G  Brient, JC  Bourdon, P  Rouge, A  Rumpf, M  Valassi, A  Verderi, M  Videau, H  Candlin, DJ  Parsons, MI  Focardi, E  Parrini, G  Corden, M  Georgiopoulos, C  Jaffe, DE  Antonelli, A  Bencivenni, G  Bologna, G  Bossi, F  Campana, P  Capon, G  Casper, D  Chiarella, V  Felici, G  Laurelli, P  Mannocchi, G  Murtas, F  Murtas, GP  Passalacqua, L  PepeAltarelli, M  Curtis, L  Dorris, SJ  Halley, AW  Knowles, IG  Lynch, JG  OShea, V  Raine, C  Scarr, JM  Smith, K  TeixeiraDias, P  Thompson, AS  Thomson, E  Thomson, F  Turnbull, RM  Becker, U  Geweniger, C  Graefe, G  Hanke, P  Hansper, G  Hepp, V  Kluge, EE  Putzer, A  Schmidt, M  Sommer, J  Stenzel, H  Tittel, K  Werner, S  Wunsch, M  Beuselinck, R  Binnie, DM  Cameron, W  Dornan, PJ  Martin, EB  Moutoussi, A  Nash, J  Sedgbeer, JK  Stacey, AM  Williams, MD  Dissertori, G  Girtler, P  Kuhn, D  Rudolph, G  Betteridge, AP  Bowdery, CK  Colrain, P  Crawford, G  Finch, AJ  Foster, F  Hughes, G  Sloan, T  Williams, MI  Galla, A  Giehl, I  Greene, AM  Hoffmann, C  Jakobs, K  Kleinknecht, K  Quast, G  Renk, B  Rohne, E  Sander, HG  vanGemmeren, P  Zeitnitz, C  Aubert, JJ  Bencheikh, AM  Benchouk, C  Bonissent, A  Bujosa, G  Calvet, D  Carr, J  Diaconu, C  Etienne, F  Konstantinidis, N  Payre, P  Rousseau, D  Talby, M  Sadouki, A  Thulasidas, M  Trabelsi, K  Aleppo, M  Ragusa, F  Berlich, R  Blum, W  Buscher, V  Dietl, H  Dydak, F  Ganis, G  Gotzhein, C  Kroha, H  Lutjens, G  Lutz, G  Manner, W  Moser, HG  Richter, R  RosadoSchlosser, A  Schael, S  Settles, R  Seywerd, H  StDenis, R  Stenzel, H  Wiedenmann, W  Wolf, G  Boucrot, J  Callot, O  Choi, Y  Cordier, A  Davier, M  Duflot, L  Grivaz, JF  Heusse, P  Hocker, A  Jacholkowska, A  Jacquet, M  Kim, DW  LeDiberder, F  Lefrancois, J  Lutz, AM  Nikolic, I  Park, HJ  Schune, MH  Simion, S  Veillet, JJ  Videau, I  Zerwas, D  Azzurri, P  Bagliesi, G  Batignani, G  Bettarini, S  Bozzi, C  Calderini, G  Carpinelli, M  Ciocci, MA  Ciulli, V  DellOrso, R  Fantechi, R  Ferrante, I  Foa, L  Forti, F  Giassi, A  Giorgi, MA  Gregorio, A  Ligabue, F  Lusiani, A  Marrocchesi, PS  Messineo, A  Palla, F  Sanguinetti, G  Sciaba, A  Spagnolo, P  Steinberger, J  Tenchini, R  Tonelli, G  Vannini, C  Verdini, PG  Blair, GA  Bryant, LM  Chambers, JT  Gao, Y  Green, MG  Medcalf, T  Perrodo, P  Strong, JA  vonWimmerspergToeller, JH  Botterill, DR  Cliff, RW  Edgecock, TR  Haywood, S  Maley, P  Norton, PR  Thompson, JC  Wright, AE  BlochDevaux, B  Colas, P  Emery, S  Kozanecki, W  Lancon, E  Lemaire, MC  Locci, E  Perez, P  Rander, J  Renardy, JE  Roussarie, A  Schuller, JP  Schwindling, J  Trabelsi, A  Vallage, B  Black, SN  Dann, JH  Johnson, RP  Kim, HY  Litke, AM  McNeil, MA  Taylor, G  Booth, CN  Boswell, R  Brew, CAJ  Cartwright, S  Combley, F  Koksal, A  Letho, M  Newton, WM  Reeve, J  Thompson, LF  Bohrer, A  Brandt, S  Cowan, G  Grupen, C  MinguetRodriguez, J  Rivera, F  Saraiva, P  Smolik, L  Stephan, F  Apollonio, M  Bosisio, L  DellaMarina, R  Giannini, G  Gobbo, B  Musolino, G  Rothberg, J  Wasserbaech, S  Armstrong, SR  Elmer, P  Feng, Z  Ferguson, DPS  Gao, YS  Gonzalez, S  Grahl, J  Greening, TC  Hayes, OJ  Hu, H  McNamara, PA  Nachtman, JM  Orejudos, W  Pan, YB  Saadi, Y  Scott, IJ  Walsh, AM  Walsh, J  Wu, SL  Wu, X  Yamartino, JM  Zheng, M  Zobernig, G  


Journal:
PHYSICS LETTERS B


Issue Date:
1997


Abstract(summary):

Two samples of exclusive semileptonic decays, 579 (B) over bar(0) --> D*(+)l(-)(v) over bar(l) events and 261 (B) over bar(0) --> D(+)l(-)(v) over bar(l) 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(omega) at zero recoil of the D-(*+) meson and the CKM matrix element \V-cb\ are measured to be FD*+(1)\V-cb\ = (31.9 +/- 1.8(stat) +/- 1.9(syst)) x 10(-3), FD+(1)\(V-cb\ = (27.8 +/- 6.8(stat) +/- 6.5(syst)) x 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 \V-cb\ 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 \V-cb\ = (34.4 +/- 1.6(stat)+/- 2.3(syst) +/- 1.4(th)) x 10(-3). The branching fractions are measured from the two integrated spectra to be Br((B) over bar(0) --> D(*+)l(-)(v) over bar(l)) = (5.53 +/- 0.26(stat) +/- 0.52(syst))%, Br((B) over bar(0) --> D(+)l(-)(v) over bar(l)) = (2.35 +/- 0.20(stat) +/- 0.44(syst))%. (C) 1997 Elsevier Science B.V.


Page:
373---387


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