Charmonium suppression from shadowing effects
نویسندگان
چکیده
منابع مشابه
Charmonium suppression from purely geometrical effects
The extend to which geometrical effects contribute to the production and suppression of the J/ψ and qq minijet pairs in general is investigated for high energy heavy ion collisions at SPS, RHIC and LHC energies. For the energy range under investigation, the geometrical effects referred to are shadowing and anti-shadowing, respectively. Due to those effects, the parton distributions in nuclei de...
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Has the quark gluon plasma been discovered at the CERN SPS? Experiment NA50 has reported an abrupt decrease in ψ production in Pb+Pb collisions at 158 GeV per nucleon [1]. Specifically, the collaboration presented a striking ‘threshold effect’ in the ψ–to–continuum ratio by plotting it as a function of a calculated quantity, the mean path length of the ψ through the nuclear medium, L, as shown ...
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We investigate a scenario where conditions for Mott dissociation of charmonium are fulfilled locally in ultrarelativistic heavy ion collisions at the short time scales before hadronization and study possible consequences to be drawn from observation of “anomalous” thresholds in the J/ψ suppression pattern. We suggest that for a compilation of experiments with different kinematics, variables pre...
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Since the suppression of J/ψ’s has been proposed by Matsui and Satz as a signal for a quark-gluon plasma formation more than a decade ago [1] a lot of experimental efforts have been devoted to use them for the quest of the formation of a quark gluon plasma created in ultra-relativistic heavy ion collisions. For small systems, where the creation of a plasma is not expected, the measured absorpti...
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The probabilistic Glauber formula for nuclear absorption used in the literature is only valid at low energies and x+ ≃ 0. Due to energy conservation, σabs is replaced by an effective cross-section σabs + x γ + (σcc̄−N − σabs) which increases with x+ and tends to the total cc̄−N cross-section σcc̄−N . Experimental data can be described with σabs ∼ 4÷ 5 mb and σcc̄−N ∼ 15÷ 20 mb. At high energies, du...
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ژورنال
عنوان ژورنال: Physical Review C
سال: 1999
ISSN: 0556-2813,1089-490X
DOI: 10.1103/physrevc.59.2744