$D$ and $\bar{D}$ mesons in hot and dense matter

Details $D$ and $\bar{D}$ mesons in hot and dense matter $D$ and $\bar{D}$ mesons in hot and dense matter

2007-10-17

arxiv.org/abs/0710.3323v1

ECONFC070910:301,2007

Physics

Nuclear Physics

Nuclear Theory

4 pages, 2 figures, to appear in the proceedings of the 11th International Conference on Meson-Nucleon Physics and the Structu

Scientific paper

The $D$ and $\bar {D}$ mesons are studied in hot dense matter within a self-consistent coupled-channel approach taking, as bare interaction, a broken SU(4) s-wave Tomozawa-Weinberg interaction supplemented by an attractive isoscalar-scalar term. The in-medium solution at finite temperature incorporates Pauli blocking effects, baryon mean-field bindings, and $\pi$ and open-charm meson self-energies. In the $DN$ sector, the $\Lambda_c$ and $\Sigma_c$ resonances remain close to their free-space position while acquiring a remarkable width. As a result, the $D$ meson spectral density shows a single pronounced peak close to the free mass that broadens with increasing density specially towards lower energies. The low-density theorem is not a good approximation for the repulsive $\bar D$ self-energy close to saturation density. We discuss the implications for the $J/\Psi$ suppression at CBM (FAIR).

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