Evading 1/m_b-suppressed IR divergencies in QCDF: Bs-->KK Decays and B_{d,s} mixing

TL;DR

This paper investigates deviations in CP asymmetries in B and Bs decays caused by penguin pollution, using IR-divergence-free QCD-factorization methods, and proposes new ways to extract unitarity triangle angles.

Contribution

It introduces a IR-divergence-free approach within QCD-factorization to analyze CP asymmetry deviations and offers alternative methods for unitarity triangle angle extraction.

Findings

Quantifies deviations in CP asymmetries due to penguin pollution.

Provides predictions for Bs-->K*K* observables.

Suggests new extraction methods for unitarity triangle angles.

Abstract

We analyze the deviations of the mixing induced CP asymmetry in B-->phi Ks from sin(2beta), as well as the deviations of the asymmetries in Bs-->K*K*, Bs-->phi K* and Bs-->phi phi from sin(2beta_s), that arise in SM due to penguin pollution. We use a theoretical input which is short-distance dominated in QCD-factorization and thus free of IR-divergencies. We also provide alternative ways to extract angles of the unitarity triangle from penguin-mediated decays, and give predictions for Bs-->K*K* observables.