Leptonic and semileptonic decays of mesons in the domain model of the QCD vacuum

Abstract

The leptonic and semileptonic decays of mesons are investigated within the domain model of quantum chromodynamics (QCD) vacuum and hadronization. The domain model is the mean-field approach based on the statistical ensemble of almost everywhere homogeneous Abelian (anti-)self-dual gluon fields which reproduces main features of low-energy QCD and allows one to deduce a nonlocal effective meson action. Using this meson action, the leptonic decay constants, form factors and branching ratios of semileptonic decays are evaluated simultaneously with masses of mesons. The results are compared to experimental data or other approaches. Published by the American Physical Society 2024