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

TL;DR

This paper reports measurements of branching fractions, polarization, and CP asymmetries in charmless vector-vector B meson decays using a large data sample from the BABAR detector, providing insights into decay dynamics and CP violation.

Contribution

It presents the first detailed measurements of polarization and CP asymmetries in specific charmless B decays, expanding understanding of decay mechanisms and CP violation effects.

Findings

Measured branching fractions for several decay modes.

Determined the degree of longitudinal polarization.

Set upper limits on certain decay processes.

Abstract

With a sample of approximately 89 million BBbar pairs collected with the BABAR detector, we perform a search for B meson decays into pairs of charmless vector mesons (phi, rho, and K*). We measure the branching fractions, determine the degree of longitudinal polarization, and search for CP violation asymmetries in the processes B->phiK*+, B->phiK*0, B->rho0K*+, and B->rho0rho+. We also set an upper limit on the branching fraction for the decay B->rho0rho0.