A Measurement of the B0 --> J/psi pi+pi- Branching Fraction

2002/03/26 by The BABAR Collaboration, B. Aubert, Aubert, B.
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #hep-ex

paper · pdf · doi:10.48550/arxiv.hep-ex/0203034

16 pages, 1 postscript figure, presented at the XXXVIIth Rencontres de Moriond on QCD and Hadronic Interactions

arxiv created 2002/03/26 · arxiv updated 2009/11/30

Abstract

We present a preliminary measurement of the branching fraction for the decay of the neutral B meson into the final state J/ψπ⁺π^-. The data set contains approximately 56 million BB pairs produced at the Υ(4S) resonance and recorded by the BaBar detector at the PEP-II e⁺e^- collider. The result of this analysis is B(B⁰→ J/ψπ⁺π^-) = (5.0 ± 0.7 ± 0.6)× 10^-5, where the first error is statistical and the second is systematic.

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