Extended Nonlocal Chiral-Quark Model for the Heavy–Light Quark Systems

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 (fD, fB, fD s , fB s ) = (207.54, 208.13, 262.56, 262.39) MeV. These values are in relatively good agreement with experimental data and various theoretical estimations.