2008/10/03 by Liu, Feng
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex)
paper · doi:10.48550/arxiv.0810.0566
We present Dalitz-plot analyses of B+→ K+π-π+ and B0→ K+π-π0 using the data sample collected at the Υ(4S) by the BABAR detector. We have found evidence for direct CP-violation in the decay B^±→ρ0 K^±, with a CP-violation parameter \cal ACP=ΓB+-ΓB-\over ΓB++ΓB-= (+44±10±4+5-13)%, where ΓB^± are the decay rates. The uncertainties are statistical, systematic, and model-dependent, respectively. We also search for the suppressed decays B+→ K-π+π+ and K+K+π- and improve upper limits on the decay branching fractions.