We present branching fraction measurements of charged and neutral B decays to Dπ-, D*π-, and "D**"π- with a missing mass method, based on a sample of 231×106 Υ(4S)→BB̄ pairs collected by the BABAR detector at the PEP-II e+e- collider. One of the B mesons is fully reconstructed and the other one decays to a reconstructed charged π and a companion charmed meson identified by its recoil mass, inferred by kinematics. Here "D**" refers to the sum of all the nonstrange charm meson states with masses in the range 2.2-2.8GeV/c2. We measure the branching fractions: B(B-→D0π-)=(4.49±0.21±0.23) ×10-3, B(B-→D*0π-)=(5.13±0.22±0.28)×10- 3, B(B-→"D**0"π-)=(5.50±0.52±1.04) ×10-3, B(B̄0→D+π-)=(3.03±0.23±0.23)×10-3, B(B̄0→D*+π-)=(2.99±0.23±0.24)×10-3, B(B̄0→"D**+"π-)=(2.34±0.65±0. 88)×10-3, and their ratios.

Aubert, B., Bona, M., Boutigny, D., Couderc, F., Karyotakis, Y., Lees, J., et al. (2006). Measurement of the absolute branching fractions B→Dπ, D*π, D**π with a missing mass method. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 74(11) [10.1103/PhysRevD.74.111102].

Measurement of the absolute branching fractions B→Dπ, D*π, D**π with a missing mass method

CARPINELLI, Massimo;
2006

Abstract

We present branching fraction measurements of charged and neutral B decays to Dπ-, D*π-, and "D**"π- with a missing mass method, based on a sample of 231×106 Υ(4S)→BB̄ pairs collected by the BABAR detector at the PEP-II e+e- collider. One of the B mesons is fully reconstructed and the other one decays to a reconstructed charged π and a companion charmed meson identified by its recoil mass, inferred by kinematics. Here "D**" refers to the sum of all the nonstrange charm meson states with masses in the range 2.2-2.8GeV/c2. We measure the branching fractions: B(B-→D0π-)=(4.49±0.21±0.23) ×10-3, B(B-→D*0π-)=(5.13±0.22±0.28)×10- 3, B(B-→"D**0"π-)=(5.50±0.52±1.04) ×10-3, B(B̄0→D+π-)=(3.03±0.23±0.23)×10-3, B(B̄0→D*+π-)=(2.99±0.23±0.24)×10-3, B(B̄0→"D**+"π-)=(2.34±0.65±0. 88)×10-3, and their ratios.
Articolo in rivista - Articolo scientifico
BABAR detector
English
B. Aubert et al. (BABAR Collaboration)
Aubert, B., Bona, M., Boutigny, D., Couderc, F., Karyotakis, Y., Lees, J., et al. (2006). Measurement of the absolute branching fractions B→Dπ, D*π, D**π with a missing mass method. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 74(11) [10.1103/PhysRevD.74.111102].
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