J/ψ suppression at √ s = 200 GeV in the comovers interaction model

الأصل · EN

The yield of J/ψ per binary nucleon-nucleon collision in AuAu and CuCu collisions at √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, σco = 0.65 mb, which describes the anomalous J/ψ 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/ψ yields. A comparison with the results at CERN-SPS, including a prediction for InIn collisions, is also presented.