Mott effect at the chiral phase transition and anomalous J/Psi suppression

Details Mott effect at the chiral phase transition and anomalous J/Psi suppression Mott effect at the chiral phase transition and anomalous J/Psi suppression

2000-12-08

arxiv.org/abs/nucl-th/0012030v3

Phys.Lett. B506 (2001) 297-302

Physics

Nuclear Physics

Nuclear Theory

9 pages, 3 figures; final version to appear in Phys. Lett. B

Scientific paper

10.1016/S0370-2693(01)00141-1

We investigate the in-medium modification of the charmonium break-up processes due to the Mott effect for light (pi) and open-charm (D, D*) mesons at the chiral/deconfinement phase transition. A model calculation for the process J/Psi + pi -> D + \bar D* + h.c. is presented which demonstrates that the Mott effect for the D-mesons leads to a threshold effect in the thermal averaged break-up cross section. This effect is suggested as an explanation of the phenomenon of anomalous J/Psi suppression in the CERN NA50 experiment.

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