Rates, Polarizations, and Asymmetries in Charmless Vector-Vector B Decays

2003/03/13 by B. Aubert, Aubert, B.
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #Neutrino Physics Research #Particle physics theoretical and experimental studies

paper · pdf · doi:10.48550/arxiv.hep-ex/0303020

openalex publication_date 2003/03/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

With a sample of approximately 89 million BBbar pairs collected with the BABAR detector, we measure branching fractions, determine the degree of longitudinal polarization, and search for direct CP violation in the decays B0=>phiK*0 and B+=>phiK*+. We perform a search for other charmless vector-vector B decays involving rho and K*(892) resonances and observe the decays B+=>rho0K*+ and B+=>rho0rho+. The branching fractions are measured to be BR(phiK*0)=(11.1^+1.3_-1.2± 1.1)10^-6, BR(phiK*+)=(12.1^+2.1_-1.9± 1.5)10^-6, BR(rho0K*+)=(7.7^+2.1_-2.0± 1.4)10^-6, and BR(rho0rho+)=(9.9^+2.6_-2.5± 2.5)10^-6. The longitudinal polarization fractions are measured to be GammaL/Gamma(phiK*0)=0.65± 0.07± 0.04 and GammaL/Gamma(phiK*+)=0.46± 0.12± 0.05. We measure the charge asymmetries: ACP(phiK*0)=+0.04± 0.12± 0.02 and ACP(phiK*+)=+0.16± 0.17± 0.04.

Related

• Measurement of Charmless B to Vector-Vector decays at BaBar
• Measurements of Branching Fraction, Polarization, and Direct-CP-Violating Charge Asymmetry in B+ --> K*0 Rho+ Decays
• Charmless hadronic B decays into Vector, Axial Vector and Tensor final states at BaBar
• Observation of the Decay B0->rho+rho- and Measurement of the Branching Fraction and Polarization
• Measurement of the branching fraction, polarization, and CP asymmetry in B0 -> rho+rho- decays