Measurement of Branching Fractions and Charge Asymmetries in $B^{\pm} \to ρ^{\pm} π^{0}$ and $B^{\pm} \to ρ^{0} π^{\pm}$ Decays, and Search for $B^{0} \to ρ^{0} π^{0}$

We present measurements of branching fractions and charge asymmetries in

B

-meson decays to

ρ^{+} π^{0}

ρ^{0} π^{+}

, and

ρ^{0} π^{0}

. The data sample comprises

89 \times 10^{6}

Υ (4 S) \to B \bar{B}

decays collected with the BABAR detector at the PEP-II asymmetric-energy

B

Factory at SLAC. We find the charge-averaged branching fractions

B (B^{+} \to ρ^{+} π^{0}) = [10.9 \pm 1.9 (s t a t) \pm 1.9 (s y s t)] \times 10^{- 6}

and

B (B^{+} \to ρ^{0} π^{+}) = (9.5 \pm 1.1 \pm 0.9) \times 10^{- 6}

, and we set a

90 %

confidence-level upper limit

B (B^{0} \to ρ^{0} π^{0}) < 2.9 \times 10^{- 6}

. We measure the charge asymmetries

A_{C P}^{ρ^{+} π^{0}} = 0.24 \pm 0.16 \pm 0.06

and

A_{C P}^{ρ^{0} π^{+}} = - 0.19 \pm 0.11 \pm 0.02

This publication has 10 references indexed in Scilit:

Measurement of Branching Fractions and Charge Asymmetries in B±→ρ±π0 and B±→ρ0π± Decays, and Search for B0→ρ0π0