$D$-mesons and charmonium states in hot pion matter

Details $D$-mesons and charmonium states in hot pion matter $D$-mesons and charmonium states in hot pion matter

2004-10-14

arxiv.org/abs/nucl-th/0410065v2

Phys.Rev. C73 (2006) 035204

Physics

Nuclear Physics

Nuclear Theory

5 pages Revtex, 4 eps figures, final version accepted for publication in PRC

Scientific paper

10.1103/PhysRevC.73.035204

We calculate the in-medium $D$ meson self-energies in a hot pion gas induced by resonance interactions with pions. The appropriate resonances in the {\it s},~ {\it p} and {\it d} waves of the $D$ meson-pion pair are represented by low lying scalar, vector and tensor $D^*$ mesons. At temperatures around 200 MeV the D-meson mass drops by $30~ \rm {MeV}$ and the scattering width grows up to $60~ \rm {MeV}$. Similar medium effects are found for the $D^*$ vector mesons. This opens and/or enhances the decay and/or dissociation channels of the charmonium states $\Psi^\prime$, $\chi_c$ and $J/\Psi$ to $D \bar D,~D^* \bar D,~D \bar D^* ,~D^* \bar D^*$ pairs in pion matter.

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