Physical Review D published a paper about leptonic and semileptonic decays of mesons in the domain model of the quantum chromodynamics (QCD) vacuum by a senior researcher of the Laboratory of Theoretical Physics at JINR Vladimir Voronin.
The leptonic and semileptonic decays of mesons are investigated within the domain model of QCD vacuum and hadronisation. The domain model is the mean-field approach based on the statistical ensemble of mostly homogeneous Abelian (anti-)self-dual gluon fields, which reproduce the main features of low-energy QCD and allow deducing a nonlocal effective meson action.
Diagrams contributing to semileptonic decay
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.
