Flavor symmetry analysis of charmless B --> VP decays

TL;DR

This paper uses flavor SU(3) symmetry to analyze charmless B to VP decays, fitting data to determine decay amplitudes, phases, and implications for CP violation and future measurements at collider experiments.

Contribution

It introduces a comprehensive global fit approach considering symmetry breaking schemes, revealing large suppressed amplitudes and phases, and predicting observables for upcoming experiments.

Findings

Large color-suppressed and penguin amplitudes identified

Nontrivial strong phases necessary to fit data

Predictions for B_s decay observables at Tevatron and LHC

Abstract

Based upon flavor SU(3) symmetry, we perform global fits to charmless B decays into one pseudoscalar meson and one vector meson in the final states. We consider different symmetry breaking schemes and find that the one implied by na{\"i}ve factorization is slightly favored over the exact symmetry case. The $(\bar\rho,\bar\eta)$ vertex of the unitarity triangle (UT) constrained by our fits is consistent with other methods within errors. We have found large color-suppressed, electroweak penguin and singlet penguin amplitudes when the spectator quark ends up in the final-state vector meson. Nontrivial relative strong phases are also required to explain the data. The best-fit parameters are used to compute branching ratio and CP asymmetry observables in all of the decay modes, particularly those in the $B_s$ decays to be measured at the Tevatron and LHC experiments.