Charmonium suppression from purely geometrical effects

Abstract

The extend to which geometrical effects contribute to the production and suppression of the $J/\psi$ and $q\bar{q}$ 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 deviate from the naive extrapolation from the free nucleon result; $f_A\ne A{f}_N$. The strength of the shadowing/anti-shadowing effect increases with the mass number. The consequences of gluonic shadowing effects for the $x_F$ distribution of $J/\psi$'s at $\sqrt{s}=20$ GeV, $\sqrt{s}=200$ GeV and $\sqrt{s}=6$ TeV are calculated for some relevant combinations of nuclei, as well as the $p_T$ distribution of minijets at midrapidity for $N_f=4$ in the final state.

corrected some typos, improved shadowing ratios

References in corpus (2)

• J/Ψproduction, $\chi$ polarization and Color Fluctuations
• Nuclear Shadowing Effects on Prompt Photons at RHIC and LHC

Cited by in corpus (7)

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• Dissociation rates of J/psi's with comoving mesons - thermal vs. nonequilibrium scenario
• Bottom and Charm Production at LHC and RHIC
• On the $x_F$ Distribution of $J/\psi$'s Produced in Heavy Ion Collisions
• The High Density Effects in Heavy Quark Production at pA Colliders