Studies of $B^0 \to ρ^\pm π^\mp$ and Evidence of $B^0 \to ρ^0 π^0$

K. Abe

paper

Studies of $B^{0} \to ρ^{\pm} π^{\mp}$ and Evidence of $B^{0} \to ρ^{0} π^{0}$

arXiv:hep-ex/0307077

Abstract

We report studies of $B^{0} \to π^{+} π^{-} π^{0}$ , using $78 fb^{- 1}$ of data collected at the $Υ (4 S)$ resonance with the Belle detector at the KEKB asymmetric $e^{+} e^{-}$ storage ring. We measure the branching fraction for $B^{0} \to ρ^{\pm} π^{\mp}$ to be $B (B^{0} \to ρ^{\pm} π^{\mp}) = (29. 1_{- 4.9}^{+ 5.0} (stat) \pm 4.0 (syst)) \times 1 0^{- 6}$ , and find an untagged charge asymmetry $A = - 0.3 8_{- 0.21}^{+ 0.19} (stat)_{- 0.05}^{+ 0.04} (syst)$ . We find the first evidence for $B^{0} \to ρ^{0} π^{0}$ with $3.1 σ$ statistical significance and with a branching fraction of $B (B^{0} \to ρ^{0} π^{0}) = (6. 0_{- 2.3}^{+ 2.9} (stat) \pm 1.2 (syst)) \times 1 0^{- 6}$ .

Submitted to International Europhysics Conference on High Energy Physics, July 2003, Aachen, Germany

Studies of B0→ρ±π∓ and Evidence of B0→ρ0π0

Abstract

Studies of $B^{0} \to ρ^{\pm} π^{\mp}$ and Evidence of $B^{0} \to ρ^{0} π^{0}$