Measurement of the branching fractions for B^0 -> D^{*-}pi^+ and B^0 -> D^{*-}rho^+

TL;DR

This paper reports measurements of the branching fractions for B^0 decays into D^{*-}pi^+ and D^{*-}rho^+ using data from the BABAR detector, providing important experimental results in B meson decay studies.

Contribution

First measurements of the absolute branching fractions for B^0 -> D^{*-}pi^+ and B^0 -> D^{*-}rho^+ decays using fully reconstructed events from BABAR data.

Findings

Branching fraction for B^0 -> D^{*-}pi^+ is (2.9±0.3±0.3) x 10^{-3}

Branching fraction for B^0 -> D^{*-}rho^+ is (11.2±1.1±2.5) x 10^{-3}

Used 5.2 fb^{-1} of e^+e^- data at PEP-II

Abstract

Using 5.2 fb-1 of e^+e^- annihilation data recorded with the BABAR detector at the PEP-II storage ring while operating on the Y(4S) resonance, a sample of fully reconstructed B^0 decays in the hadronic modes B^0 -> D^{*-}pi^+ and B^0 -> D^{*-}rho^+ have been reconstructed. In this paper, a study of these events is reported, including preliminary measurements of the absolute branching fractions for these modes, which are found to be B(B^0 -> D^{*-}pi^+) = (2.9+/-0.3+/-0.3) x 10^{-3} and B(B^0 -> D^{*-}rho^+) = (11.2+/-1.1+/-2.5) x 10^{-3}.