arXiv:0705.0477·v3·High Energy Physics — Phenomenology
Penguin-mediated B_(d,s)->VV decays and the Bs - anti-Bs mixing angle
Sebastien Descotes-Genon (Orsay, LPT)🇫🇷 · Joaquim Matias (Barcelona, IFAE)🇪🇸 · Javier Virto (Barcelona, IFAE)🇪🇸
Abstract
In this letter, we propose three different strategies to extract the weak mixing angle phi_s of the Bs system using penguin-mediated decays into vectors, mainly Bs->K*K*, Bs->phi K* and Bs->phi phi. We also provide predictions for the longitudinal branching ratio and CP-asymmetries of Bs->K*K* using a method that combines QCD factorisation with flavour symmetries to relate this decay to its Bd counterpart.
Comments: 16 pages, 4 figures. References added. Version published in PRD