HAL : in2p3-00418459, version 1
 arXiv : 0904.4063
 Physical Review Letters 104 (2010) 011802
 Measurement of |V_cb| and the Form-Factor Slope in Bbar -> D l- nubar Decays in Events Tagged by a Fully Reconstructed B Meson
 BABAR Collaboration(s)
 (2010)
 We present a measurement of the Cabibbo-Kobayashi-Maskawa matrix element |V_cb| and the form-factor slope rho^2 in Bbar -> Dl- nubar decays based on 460 million BBar events recorded at the Upsilon(4S) resonance with the BaBar detector. BBar -> Dl- nubar decays are selected in events in which a hadronic decay of the second B meson is fully reconstructed. We measure the differential decay rate and determine G(1) |V_cb|= (43.0 \pm 1.9 \pm 1.4)\times 10^{-3} and rho^2 = 1.20 \pm 0.09 \pm 0.04, where G(1) is the the hadronic form factor at the point of zero recoil. We also determine the exclusive branching fractions and find BF(B^- -> D0l- nubar) = (2.31 \pm 0.08 \pm 0.09)% and BF (B0bar -> D+ l^- nubar)=(2.23 \pm 0.11 \pm 0.11)%.
 Thème(s) : Physique/Physique des Hautes Energies - Expérience
 Lien vers le texte intégral : http://fr.arXiv.org/abs/0904.4063
 in2p3-00418459, version 1 http://hal.in2p3.fr/in2p3-00418459 oai:hal.in2p3.fr:in2p3-00418459 Contributeur : Nicole Berger <> Soumis le : Vendredi 18 Septembre 2009, 16:08:08 Dernière modification le : Jeudi 7 Janvier 2010, 16:46:51