Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2003-08-28
Phys.Rev. C69 (2004) 015202
Physics
Nuclear Physics
Nuclear Theory
18 pages including 7 figures, minor revision of the text, figure styles modified, to appear in Phys. Rev. C
Scientific paper
10.1103/PhysRevC.69.015202
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 ($\Psi^\prime$, $\chi_c$, $J/\Psi$) 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.
Bratkovskaya Elena L.
Mishra Amruta
Schaffner-Bielich Jurgen
Schramm Stefan
Stocker Horst
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