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

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

2004-06-02

arxiv.org/abs/hep-ex/0406006v1

Phys.Rev.Lett.94:031801,2005

Physics

High Energy Physics

High Energy Physics - Experiment

5 pages, 3 figures; submitted to Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.94.031801

We report a measurement of the branching fraction for the decay $B^+ \to \rho^+\pi^0$ based on a 140 ${\rm fb}^{-1}$ data sample collected with the Belle detector at the KEKB asymmetric $e^+e^-$ collider. We measure the branching fraction ${\cal B}(B^+ \to \rho^+\pi^0)=(13.2\pm 2.3({\rm stat.})^{+1.4}_{-1.9}({\rm sys.}))\times 10^{-6}$, and the CP-violating asymmetry ${\cal A}_{CP}(B^\mp \to \rho^\mp\pi^0)=0.06\pm0.19({\rm stat.})^{+0.04}_{-0.06}({\rm sys.})$.

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