Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2008-07-10
AIPConf.Proc.1056:207-214,2008
Physics
High Energy Physics
High Energy Physics - Phenomenology
8 pages, 7 figures. Based on invited talk presented by J.N. at "Sixth International Conference on Perspectives in Hadronic Phy
Scientific paper
10.1063/1.3013043
We present an universal treatment for a substantial nuclear suppression representing a common feature of all known reactions on nuclear targets (forward production of high-pT hadrons, production of direct photons, the Drell-Yan process, heavy flavor production, etc.). Such a suppression at large Feynman xF, corresponding to region of minimal light-cone momentum fraction variable x2 in nuclei, is tempting to interpret as a manifestation of coherence or the Color Glass Condensate. We demonstrate, however, that it is actually a simple consequence of energy conservation and takes place even at low energies, where no effects of coherence are possible. We analyze this common suppression mechanism for several processes performing model predictions in the light-cone dipole approach. Our calculations agree with data.
Nemchik Jan
Potashnikova I. K.
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