J/q/SUPPRESSION BY QUARK-GLUON PLASMA FORMATION ~
نویسنده
چکیده
If high energy heavy ion collisions lead to the formation of a hot quark-gluon plasma, then colour screening prevents ce binding in the deconfined interior of the interaction region. To study this effect, the temperature dependence of the screening radius, as obtained from lattice QCD, is compared with the J/~' radius calculated in charmonium models. The feasibility to detect this effect clearly in the dilepton mass spectrum is examined. It is concluded that J/q/suppression in nuclear collisions should provide an unambiguous signature of quark-gluon plasma formation.
منابع مشابه
J/Ψ suppressions in a thermally equilibrating quark-gluon plasma at RHIC
We estimate the survival probability of J/ψ in relativistic heavy-ion collisions, using both short-distance QCD and nuclear absorption mechanism. The suppression is found to be almost 100 percent for a thermally equilibrating quark-gluon plasma. The measurement of such a huge suppression of J/ψ may suggest the existence of a deconfined partonic medium, possibly a thermalised quark-gluon plasma,...
متن کاملAzimuthal asymmetry of J/ψ suppression in non-central heavy-ion collisions
The azimuthal asymmetry of J/ψ suppression in non-central heavy-ion collisions is studied within a dynamic model of J/ψ suppression in a deconfined partonic medium. Within this model, J/ψ suppression in heavy-ion collisions is caused mainly by the initial state nuclear absorption and dissociation via gluon-J/ψ scattering in deconfined partonic medium. Only the second mechanism gives arise to az...
متن کامل- th / 9 90 50 16 v 1 6 M ay 1 99 9 Dilepton Production from ρ - Mesons in a Quark - Gluon Plasma ∗
Assuming that ρ -mesons exist in a quark-gluon plasma at temperatures close to the QCD phase transition, we calculate the dilepton production rate from q-q̄ annihilation via a ρ -meson state using Vector Meson Dominance. The result is compared to the rates from direct q-q̄ annihilation and from π-π annihilation. Furthermore we discuss the suppression of low mass dileptons if the quarks assume an ...
متن کاملJ/ψ Suppression in Pb+Pb Collisions: A New Look at Hadrons vs. Plasma
A reexamination of hadronic comover scattering indicates that this mechanism cannot explain the observed J/ψ suppression in Pb+Pb interactions. The possibility of quark-gluon plasma formation is then plausible. We present calculations in which the χc and ψ ′ are suppressed by the plasma while the J/ψ itself is not.
متن کاملColor singlet suppression of quark-gluon plasma formation.
The rate of quark-gluon plasma droplet nucleation in superheated hadronic matter is calculated within the MIT bag model. The requirements of color singletness and (to less extent) fixed momentum suppress the nucleation rate by many orders of magnitude, making thermal nucleation of quark-gluon plasma droplets unlikely in ultrarelativistic heavy-ion collisions if the transition is first order and...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2002