Search for CP Violation in B0/B0b Decays to pi+pi-pi0 and K+-pi-+pi0 in Regions Dominated by the rho+- Resonance

2002/07/24 by B. Aubert, Aubert, B.
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #Nuclear physics research studies #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex

paper · pdf · doi:10.48550/arxiv.hep-ex/0207068

arxiv created 2002/07/24 · openalex publication_date 2002/07/24 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We present preliminary measurements of direct and indirect CP-violating asymmetries in the decays of neutral B mesons to pi+pi-pi0 and K+-pi-+pi0 final states dominated by the rho+- resonance, using a time-dependent maximum likelihood analysis. The data sample comprises 88 10^ Upsilon(4S) -> BBb decays (80.8 fb-1) collected with the BaBar detector at the PEP-II asymmetric-energy B Factory at SLAC. For the CP violation parameters, we measure A_CP(rho K) = 0.19 +/- 0.14 (stat) +/- 0.11 (syst), A_CP(rho pi) = -0.22 +/- 0.08 (stat) +/- 0.07 (syst), C(rho pi) = 0.45 +0.18/-0.19 (stat) +/- 0.09 (syst), S(rho pi) = 0.16 +/- 0.25 (stat) +/- 0.07 (syst). For the other parameters in the description of the B0B0b -> rho pi decay-time dependence, we obtain DeltaC(rho pi) = 0.38 +0.19/-0.20 (stat) +/- 0.11 (syst), DeltaS(rho pi) = 0.15 +/- 0.26 (stat) +/- 0.05 (syst).

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