Energy dependence of J/psi absorption in proton-nucleus collisions

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dc.creatorLourenco, Carlos
dc.creatorVogt, Ramona
dc.creatorWoehri, Hermine K.
dc.date2009-01-20
dc.date.accessioned2026-07-07T13:09:15Z
dc.date.available2026-07-07T13:09:15Z
dc.descriptionCharmonium states are expected to be considerably suppressed in the case of quark-gluon plasma formation in high-energy heavy-ion collisions. However, a robust identification of suppression patterns as signatures of a deconfined QCD medium requires a detailed understanding of the "normal nuclear absorption" already present in proton-nucleus collisions, where the charmonium production cross sections increase less than linearly with the number of target nucleons. We analyse the J/psi production cross sections measured in proton-nucleus collisions in fixed target experiments, with proton beam energies from 200 to 920 GeV, and in d-Au collisions at RHIC, at sqrt(s)=200 GeV, in the framework of the Glauber formalism, using several sets of parton distributions with and without nuclear modifications. The results reveal a significant dependence of the "absorption cross section" on the kinematics of the J/psi and on the collision energy. Extrapolating the observed patterns we derive the level of absorption expected at Elab=158 GeV, the energy at which the heavy-ion data sets were collected at the CERN SPS.
dc.description23 pages, 11 figures, 7 tables
dc.identifierhttps://arxiv.org/abs/0901.3054
dc.identifierhttp://arxiv.org/abs/0901.3054
dc.identifierJHEP 0902:014,2009
dc.identifierdoi:10.1088/1126-6708/2009/02/014
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/228672
dc.subjectHigh Energy Physics - Phenomenology
dc.titleEnergy dependence of J/psi absorption in proton-nucleus collisions
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