Non-leptonic annihilation decays of B mesons with a natural infrared cutoff

TL;DR

This paper calculates B meson annihilation decay amplitudes using infrared finite gluon propagators derived from QCD Schwinger-Dyson equations, offering insights into non-perturbative effects and testing QCD infrared behavior.

Contribution

It introduces a systematic approach to compute B meson decay amplitudes with a natural infrared cutoff based on solutions of the Schwinger-Dyson equations, advancing the understanding of non-perturbative QCD effects.

Findings

Decay amplitudes computed with infrared finite gluon propagators.

Infrared cutoff provides a consistent framework for annihilation decay calculations.

Potential to test QCD infrared behavior through B meson decay studies.

Abstract

Within the QCD factorization approach we compute the amplitudes for annihilation channels of B mesons decays into final states containing two pseudoscalar particles. These decays may be plagued by effects like non-perturbative physics or breaking of the factorization hypothesis and imply, at some extent, the introduction of an infrared cutoff in the calculation of amplitudes. We compute the decays with the help of infrared finite gluon propagators and coupling constants that were obtained in different solutions of the QCD Schwinger-Dyson equations. These solutions yield a natural cutoff for the amplitudes, and we argue that a systematic study of these B decays may provide a test for the QCD infrared behavior.