We report a measurement of the branching fractions for B̄→ D(*)(π)-ν̄ decays based on 341.1fb-1 of data collected at the Υ(4S) resonance with the BABAR detector at the SLAC PEP-II e+e- storage rings. Events are tagged by fully reconstructing one of the B mesons in a hadronic decay mode. We obtain B(B-→D0-ν̄)=(2.33±0. 09stat±0.09syst)%, B(B-→D*0-ν̄)=(5.83±0. 15stat±0.30syst)%, B(B̄0→D+-ν̄)=(2.21±0. 11stat±0.12syst)%, B(B̄0→D*+-ν̄)=(5.49±0. 16stat±0.25syst)%, B(B-→D+π - ν̄)=(0.42±0. 06stat±0.03syst)%, B(B-→D*+π - ν̄)=(0.59±0. 05stat±0.04syst)%, B(B̄0→D0π+-ν̄)=(0.43±0. 08stat±0.03syst)%, ; B(B̄0→D*0π+-ν̄)=(0. 48±0.08stat±0.04syst)%. © 2008 The American Physical Society.
Measurement of the branching fractions of exclusive B̄→D(*) (π)l-ν̄l decays in events with a fully reconstructed B meson
PALANO, Antimo;PAPPAGALLO, MARCO IGNAZIO;
2008-01-01
Abstract
We report a measurement of the branching fractions for B̄→ D(*)(π)-ν̄ decays based on 341.1fb-1 of data collected at the Υ(4S) resonance with the BABAR detector at the SLAC PEP-II e+e- storage rings. Events are tagged by fully reconstructing one of the B mesons in a hadronic decay mode. We obtain B(B-→D0-ν̄)=(2.33±0. 09stat±0.09syst)%, B(B-→D*0-ν̄)=(5.83±0. 15stat±0.30syst)%, B(B̄0→D+-ν̄)=(2.21±0. 11stat±0.12syst)%, B(B̄0→D*+-ν̄)=(5.49±0. 16stat±0.25syst)%, B(B-→D+π - ν̄)=(0.42±0. 06stat±0.03syst)%, B(B-→D*+π - ν̄)=(0.59±0. 05stat±0.04syst)%, B(B̄0→D0π+-ν̄)=(0.43±0. 08stat±0.03syst)%, ; B(B̄0→D*0π+-ν̄)=(0. 48±0.08stat±0.04syst)%. © 2008 The American Physical Society.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.