ar X iv : n uc l - th / 0 41 00 65 v 2 1 0 Fe b 20 06 D mesons and charmonium states in hot pion matter
نویسنده
چکیده
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 s, p and 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 MeV and the scattering width grows up to 60 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 Ψ′, χc and J/Ψ to DD̄, D ∗D̄, DD̄∗, D∗D̄∗ pairs in pion matter.
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تاریخ انتشار 2006