Nuclear effects in the Drell-Yan process at very high energies

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dc.creatorKopeliovich, B. Z.
dc.creatorRaufeisen, J.
dc.creatorTarasov, A. V.
dc.creatorJohnson, M. B.
dc.date2001-10-16
dc.date2002-11-06
dc.date.accessioned2026-07-07T12:02:50Z
dc.date.available2026-07-07T12:02:50Z
dc.descriptionWe study Drell-Yan (DY) dilepton production in proton(deuterium)-nucleus and in nucleus-nucleus collisions within the light-cone color dipole formalism. This approach is especially suitable for predicting nuclear effects in the DY cross section for heavy ion collisions, as it provides the impact parameter dependence of nuclear shadowing and transverse momentum broadening, quantities that are not available from the standard parton model. For p(D)+A collisions we calculate nuclear shadowing and investigate nuclear modification of the DY transverse momentum distribution at RHIC and LHC for kinematics corresponding to coherence length much longer than the nuclear size. Calculations are performed separately for transversely and longitudinally polarized DY photons, and predictions are presented for the dilepton angular distribution. Furthermore, we calculate nuclear broadening of the mean transverse momentum squared of DY dileptons as function of the nuclear mass number and energy. We also predict nuclear effects for the cross section of the DY process in heavy ion collisions. We found a substantial nuclear shadowing for valence quarks, stronger than for the sea.
dc.description46 pages, 18 figures, title changed and some discussion added, accepted for publication in PRC
dc.identifierhttps://arxiv.org/abs/hep-ph/0110221
dc.identifierhttp://arxiv.org/abs/hep-ph/0110221
dc.identifierPhys.Rev.C67:014903,2003
dc.identifierdoi:10.1103/PhysRevC.67.014903
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/207578
dc.subjectHigh Energy Physics - Phenomenology
dc.titleNuclear effects in the Drell-Yan process at very high energies
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