Study of B -> \rho \pi decays at Belle

TL;DR

This study measures branching fractions of B meson decays to c ho extpi final states using data from the Belle detector, providing key experimental results on decay probabilities and limits.

Contribution

It presents the first measurements of specific Bb1b0b1 ho extpi decay branching fractions and sets an upper limit for a suppressed decay mode.

Findings

Measured B(B^+ d7 b0 ho^0 extpi^+) = (8.0^{+2.3+0.7}_{-2.0-0.7}) imes 10^{-6}

Measured B(B^0 d7 b0 ho^{+-} extpi^{-+}) = (20.8^{+6.0+2.8}_{-6.3-3.1}) imes 10^{-6}

Set an upper limit B(B^0 d7 b0 ho^0 extpi^0) < 5.3 imes 10^{-6} at 90% CL

Abstract

This paper describes a study of B meson decays to the pseudoscalar-vector final state \rho\pi using 31.9\times 10^6 B\bar{B} events collected with the Belle detector at KEKB. The branching fractions B(B^+ \to \rho^0\pi^+) = (8.0^{+2.3+0.7}_{-2.0-0.7}) \times 10^{-6} and B(B^0 -> \rho^{+-} \pi^{-+}) = (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 \rho^0\pi^0) < 5.3 \times 10^{-6}is reported.