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D-mesons: In-medium effects at FAIR

L. Tolos·J. Schaffner-Bielich·H. Stoecker
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Abstract

The $D$-meson spectral density at finite temperature is obtained within a self-consistent coupled-channel approach. For the bare meson-baryon interaction, a separable potential is taken, whose parameters are fixed by the position and width of the $Λ_c (2593)$ resonance. The quasiparticle peak stays close to the free $D$-meson mass, indicating a small change in the effective mass for finite density and temperature. Furthermore, the spectral density develops a considerable width due to the coupled-channel structure. Our results indicate that the medium modifications for the $D$-mesons in nucleus-nucleus collisions at FAIR (GSI) will be dominantly on the width and not, as previously expected, on the mass.

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L. Tolos, J. Schaffner-Bielich, H. Stoecker. 2006-02-20. D-mesons: In-medium effects at FAIR. https://doi.org/10.1016/j.physletb.2006.02.045

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