B. Kampfer et Op. Pavlenko, THERMAL DILEPTON AND OPEN CHARM SIGNALS VERSUS HARD INITIAL YIELDS INHEAVY-ION COLLISIONS AT RHIC AND LHC ENERGIES, Physics letters. Section B, 391(1-2), 1997, pp. 185-190
The hard initial production of open charm and dileptons is compared wi
th possible thermal signals in heavy-ion collisions at RHIC and LHC en
ergies. Our approach is based on the perturbative QCD mini-jet mechani
sm of quark-gluon matter formation. The thermal dilepton signal is fou
nd to rise much stronger as compared to the hard Drell-Yan background
with increasing collider energy and clearly dominates at LHC energy. O
ppositely, open charm stems from initial hard production. A possible m
anifestation of gluon shadowing at RHIC and LHC energies is discussed.