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J/psi suppression in heavy ion collisions - interplay of hard and soft QCD processes

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arxiv hep-ph/9810486 v1 pith:MRGYZJMA submitted 1998-10-26 hep-ph

J/psi suppression in heavy ion collisions - interplay of hard and soft QCD processes

classification hep-ph
keywords collisionsdrell-yansuppressionagreementassumingcalculatedcharmoniumcolor
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We study J/psi suppression in AB collisions assuming that the charmonium states evolve from small, color transparent configurations. Their interaction with nucleons and nonequilibrated, secondary hadrons is simulated using the microscopic model UrQMD. The Drell-Yan lepton pair yield and the J/psi/Drell-Yan ratio are calculated as a function of the neutral transverse energy in Pb+Pb collisions at 160 GeV and found to be in reasonable agreement with existing data.

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