Measurement of the B+ --> rho+ pi0 Branching Fraction and Direct CP Asymmetry

Details Measurement of the B+ --> rho+ pi0 Branching Fraction and Direct CP Asymmetry Measurement of the B+ --> rho+ pi0 Branching Fraction and Direct CP Asymmetry

2007-01-18

arxiv.org/abs/hep-ex/0701035v1

Phys.Rev.D75:091103,2007

Physics

High Energy Physics

High Energy Physics - Experiment

submitted to Phys. Rev. D (Rapid Communications)

Scientific paper

10.1103/PhysRevD.75.091103

We present improved measurements of the branching fraction and CP asymmetry for the process B+ --> rho+ pi0. The data sample corresponding to 211/fb comprises 232 million Y(4S)-->BBbar decays collected with the BABAR detector at the PEP-II asymmetric B Factory at SLAC. The yield and CP asymmetry are measured using an extended maximum likelihood fitting method. The branching fraction and CP asymmetry are found to be BR(B+ --> rho+ pi0)= [10.2 +- 1.4(stat) +- 0.9(syst)] x 10^-6 and Acp (B+ --> rho+ pi0) = -0.01 +- 0.13(stat) +- 0.02(syst).

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