Measurement of the branching fraction for the decay B⁰ --> D^*+D^*-

2001/07/22 by B. Aubert, Aubert, B.
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex

paper · pdf · doi:10.48550/arxiv.hep-ex/0107057

13 pages, 2 figures, conference paper submitted to LP01

arxiv created 2001/07/22 · openalex publication_date 2001/07/22 · arxiv updated 2009/11/30 · openalex created_date 2024/04/11 · openalex updated_date 2026/08/01

Abstract

Decays of the type B --> D^(*) anti-D^(*) can be used to provide a measurement of the parameter sin2beta of the Unitarity Triangle that is complementary to the measurement derived from the mode B⁰ --> J/psi K_s⁰. In this document we report a measurement of the branching fraction for the decay B⁰ --> D^*+D^*- with the BABAR detector. With data corresponding to an integrated luminosity of 20.7 fb^-1 collected at the Upsilon(4S) resonance during 1999-2000, we have reconstructed 38 candidate signal events in the mode B⁰ --> D^*+D^*- with an estimated background of 6.2+/-0.5 events. From these events, we determine the branching fraction to be BF(B⁰ --> D^*+D^*-) = (8.0+/-1.6(stat)+/-1.2(syst))x10^-4 (preliminary).

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