J/$ψ$ suppression at $\sqrt{\bf s} =$ 200 GeV in the comovers interaction model

Details J/$ψ$ suppression at $\sqrt{\bf s} =$ 200 GeV in the comovers interaction model J/$ψ$ suppression at $\sqrt{\bf s} =$ 200 GeV in the comovers interaction model

2005-05-05

arxiv.org/abs/hep-ph/0505032v1

Eur.Phys.J.C42:419-424,2005

Physics

High Energy Physics

High Energy Physics - Phenomenology

15 pages, 3 figures

Scientific paper

10.1140/epjc/s2005-02348-0

The yield of $J/\psi$ per binary nucleon-nucleon collision in $AuAu$ and $CuCu$ collisions at $\sqrt{s} = 200$ GeV is computed in the framework of the dual parton model, supplemented with final state interaction (comovers interaction). For the latter we use the same value of the cross-section, $\sigma_{co} = 0.65$ mb, which describes the anomalous $J/\psi$ suppression observed at CERN-SPS energies. Several possibilities for the value of the absorptive cross-section are considered. Shadowing is introduced in both the comovers and the $J/\psi$ yields. A comparison with the results at CERN-SPS, including a prediction for $InIn$ collisions, is also presented.

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