Spectral density calculations in a heavy-light meson-meson system

TL;DR

This paper investigates the spectral properties of a heavy-light meson-meson system using lattice QCD simulations and the maximum entropy method to understand hadronic interactions.

Contribution

It introduces a lattice QCD approach combined with spectral analysis techniques to study meson-meson interactions involving static and light quarks.

Findings

Spectral densities obtained for different operator types.

Insights into the interaction mechanisms of heavy-light meson systems.

Application of maximum entropy method in this context.

Abstract

A system of two static quarks, at fixed distances r, and two light quarks is studied on an anisotropic lattice. Excitations by operators emphasizing quark or gluon degrees of freedom are examined. The maximum entropy method is applied in the spectral analysis. These simulations ultimately aim at learning about mechanisms of hadronic interaction.