We report a measurement of the branching fractions of B̄→D* *ℓ-ν̄ℓ decays based on 417fb-1 of data collected at the Υ(4S) resonance with the BABAR detector at the PEP-II e+e- storage rings. Events are selected by fully reconstructing one of the B mesons in a hadronic decay mode. A fit to the invariant mass differences m(D(*)π)- m(D(*)) is performed to extract the signal yields of the different D** states. We observe the B̄→D**ℓ- ν̄ℓ decay modes corresponding to the four D** states predicted by heavy quark symmetry with a significance greater than 5 standard deviations including systematic uncertainties.

Aubert, B., Bona, M., Karyotakis, Y., Lees, J., Poireau, V., Prencipe, E., et al. (2008). Measurement of the branching fractions of B̄→D**ℓ-ν̄ℓ decays in events tagged by a fully reconstructed B meson. PHYSICAL REVIEW LETTERS, 101(26) [10.1103/PhysRevLett.101.261802].

Measurement of the branching fractions of B̄→D**ℓ-ν̄ℓ decays in events tagged by a fully reconstructed B meson

CARPINELLI, Massimo;
2008

Abstract

We report a measurement of the branching fractions of B̄→D* *ℓ-ν̄ℓ decays based on 417fb-1 of data collected at the Υ(4S) resonance with the BABAR detector at the PEP-II e+e- storage rings. Events are selected by fully reconstructing one of the B mesons in a hadronic decay mode. A fit to the invariant mass differences m(D(*)π)- m(D(*)) is performed to extract the signal yields of the different D** states. We observe the B̄→D**ℓ- ν̄ℓ decay modes corresponding to the four D** states predicted by heavy quark symmetry with a significance greater than 5 standard deviations including systematic uncertainties.
Articolo in rivista - Articolo scientifico
B mesons; BABAR detectors; Branching fractions; Decay modes; Hadronic decays; Heavy quarks; Invariant masses; Signal yields; Standard deviations; Systematic uncertainties; Signal processing;
English
2008
101
26
261802
none
Aubert, B., Bona, M., Karyotakis, Y., Lees, J., Poireau, V., Prencipe, E., et al. (2008). Measurement of the branching fractions of B̄→D**ℓ-ν̄ℓ decays in events tagged by a fully reconstructed B meson. PHYSICAL REVIEW LETTERS, 101(26) [10.1103/PhysRevLett.101.261802].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/389625
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