Large Possible retardation effects of quark confinement on the meson spectrum II

TL;DR

This paper investigates how retardation effects in quark-antiquark interactions influence the spectrum of heavy-light mesons using a relativistic Bethe-Salpeter framework, showing that these effects can be significant.

Contribution

It demonstrates that incorporating retardation effects into the Bethe-Salpeter equation allows for accurate modeling of heavy-light meson spectra, highlighting the importance of these effects.

Findings

Retardation effects significantly impact meson spectrum calculations.

Relativistic vector and scalar interactions can fit experimental data.

The study supports the relevance of retardation in quark confinement models.

Abstract

We present the results of a study of heavy-light-quark bound states in the context of the reduced Bethe-Salpeter equation with relativistic vector and scalar interactions. We find that satisfactory fits may also be obtained when the retarded effect of the quark-antiquark interaction is concerned.