Study of B -> ρπdecays at Belle

Abstract

This paper describes a study of B meson decays to the pseudoscalar-vector final state ρπusing 31.9\times 10^6 B\bar{B} events collected with the Belle detector at KEKB. The branching fractions B(B^+ \to ρ^0π^+) = (8.0^{+2.3+0.7}_{-2.0-0.7}) \times 10^{-6} and B(B^0 -> ρ^{+-} π^{-+}) = (20.8^{+6.0+2.8}_{-6.3-3.1}) \times 10^{-6} are obtained. In addition, a 90% confidence level upper limit of B(B^0 \to ρ^0π^0) < 5.3 \times 10^{-6}is reported.

14 pages, 3 figures, to be submitted to Phys. Lett. B