Temperature dependence of the properties of open heavy-flavor mesons

TL;DR

This paper investigates how open heavy-flavor mesons behave at different temperatures in a hot mesonic medium, using an effective theory that respects chiral and heavy-quark symmetries, and computes their spectral functions, correlators, and transport properties.

Contribution

It introduces a self-consistent method to study temperature effects on open heavy-flavor mesons within an effective theory framework respecting fundamental symmetries.

Findings

Calculated temperature-dependent spectral functions of open-charm mesons.

Derived Euclidean correlators for open-charm mesons at finite temperature.

Estimated off-shell transport coefficients in the hadronic phase.

Abstract

We address the modification of open heavy-flavor mesons in a hot medium of light mesons within an effective theory approach consistent with chiral and heavy-quark spin-flavor symmetries and the use of the imaginary time formalism to introduce the non-zero temperature effects to the theory. The unitarized scattering amplitudes, the ground-state self-energies and the corresponding spectral functions are calculated self-consistently. We use the thermal ground-state spectral functions obtained with this methodology to further calculate 1) open-charm meson Euclidean correlators, and 2) off-shell transport coefficients in the hadronic phase.