Measurements of neutralBdecay branching fractions toKS0π+π−final states and the charge asymmetry ofB0→K*+π−

Abstract

We analyze the decay B0→KS0π+π− using a sample of 232×106 Υ(4S)→BB¯ decays collected with the BABAR detector at the SLAC PEP-II asymmetric-energy B factory. A maximum likelihood fit finds the following branching fractions: B(B0→K0π+π−)=(43.0±2.3±2.3)×10−6, B(B0→f0(→π+π−)K0)=(5.5±0.7±0.5±0.3)×10−6 and B(B0→K*+π−)=(11.0±1.5±0.5±0.5)×10−6. For these results, the first uncertainty is statistical, the second is systematic, and the third (if present) is due to the effect of interference from other resonances. We also measure the CP-violating charge asymmetry in the decay B0→K*+π−, AK*π=−0.11±0.14±0.05.Received 4 August 2005DOI:https://doi.org/10.1103/PhysRevD.73.031101©2006 American Physical Society