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Mass modification of D-meson in hot hadronic matter

A. Mishra·E. L. Bratkovskaya·J. Schaffner-Bielich·S. Schramm·H. Stöcker
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Abstract

We evaluate the in-medium $D$ and $\bar D$-meson masses in hot hadronic matter induced by interactions with the light hadron sector described in a chiral SU(3) model. The effective Lagrangian approach is generalized to SU(4) to include charmed mesons. We find that the D-mass drops substantially at finite temperatures and densities, which open the channels of the decay of the charmonium states ($Ψ^\prime$, $χ_c$, $J/Ψ$) to $D \bar D$ pairs in the thermal medium. The effects of vacuum polarisations from the baryon sector on the medium modification of the $D$-meson mass relative to those obtained in the mean field approximation are investigated. The results of the present work are compared to calculations based on the QCD sum-rule approach, the quark-meson coupling model, chiral perturbation theory, as well as to studies of quarkonium dissociation using heavy quark potential from lattice QCD.

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A. Mishra, E. L. Bratkovskaya, J. Schaffner-Bielich, S. Schramm, H. Stöcker. 2003-11-24. Mass modification of D-meson in hot hadronic matter. https://doi.org/10.1103/physrevc.69.015202

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