Mass spectra of heavy mesons with instanton effects

TL;DR

This paper studies heavy meson mass spectra using a nonrelativistic potential model that includes instanton effects, finding that instantons have limited impact on charmed mesons.

Contribution

It introduces a potential model incorporating instanton effects constrained by theory, providing insights into their influence on heavy meson spectra.

Findings

Instanton effects are marginal on charmed mesons.

The potential parameters are theoretically constrained.

The model combines Coulomb, confining, and instanton-induced potentials.

Abstract

We investigate the mass spectra of ordinary heavy mesons, based on a nonrelativistic potential approach. The heavy-light quark potential contains the Coulomb-type potential arising from one-gluon exchange, the confining potential, and the instanton-induced nonperturbative local heavy-light quark potential. All parameters are theoretically constrained and fixed. We carefully examine the effects from the instanton vacuum. Within the present form of the local potential from the instanton vacuum, we conclude that the instanton effects are rather marginal on the charmed mesons.