Extended nonlocal chiral-quark model for the heavy-light quark systems

TL;DR

This paper introduces an extended nonlocal chiral-quark model for heavy-light quark systems and validates it by calculating meson decay constants that align well with experimental data.

Contribution

The paper develops a new phenomenological model for heavy-light quark systems and demonstrates its effectiveness through decay constant calculations.

Findings

Calculated decay constants agree with experimental data

Model successfully describes heavy-light meson properties

Provides a new tool for studying heavy-light quark interactions

Abstract

In this talk, we report the recent progress on constructing a phenomenological effective model for the heavy-light quark systems, which consist of (u,d,s,c,b) quarks, i.e. extended nonlocal chiral-quark model (ExNLChQM). We compute the heavy-meson weak-decay constants to verify the validity of the model. From the numerical results, it turns out that (f_D, f_B, f_{D_s}, f_{B_s})=(207.54,208.13,262.56,262.39) MeV. These values are in relatively good agreement with experimental data and various theoretical estimations.