Charm at FAIR

TL;DR

This paper investigates the behavior of charmed mesons in hot, dense nuclear matter using a coupled-channel approach, revealing spectral broadening, mass shifts, and implications for charm resonances relevant to FAIR experiments.

Contribution

It introduces a self-consistent coupled-channel model to study in-medium properties of charmed mesons under conditions expected at FAIR/GSI.

Findings

$D$ meson spectral function broadens with density

$ar D$ meson mass increases with density

Predicted properties of charm resonances at FAIR energies

Abstract

Charmed mesons in hot and dense matter are studied within a self-consistent coupled-channel approach for the experimental conditions of density and temperature expected at the CBM experiment at FAIR/GSI. The $D$ meson spectral function broadens with increasing density with an extended tail towards lower energies due to $\Lambda_c(2593) N^{-1}$ and $\Sigma_c(2800) N^{-1}$ excitations. The in-medium $\bar D$ meson mass increases with density. We also discuss the consequences for the renormalized properties in nuclear matter of the charm scalar $D_{s0}(2317)$ and D(2400), and the predicted hidden charm X(3700) resonances at FAIR energies.