Forward Physics in Proton-Nucleus and Nucleus-Nucleus Collisions

Journal Article · Mon Oct 13 00:00:00 EDT 2008 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3013043· OSTI ID:21251451

Nemchik, J ^[1]; Potashnikova, I K ^[2]

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1. Institute of Experimental Physics SAS, Watsonova 47, 04001 Kosice (Slovakia)
2. Departamento de Fisica y Centro de Estudios Subatomicos, Universidad Tecnica Federico Santa Maria, Casilla 110-V, Valparaiso (Chile)

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-p{sub T} hadrons, production of direct photons, the Drell-Yan process, heavy flavor production, etc.). Such a suppression at large Feynman x{sub F}, corresponding to region of minimal light-cone momentum fraction variable x{sub 2} 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 the data.

• OSTI ID: 21251451
• Journal Information: AIP Conference Proceedings, Vol. 1056, Issue 1; Conference: 6. international conference on perspectives in hadronic physics, Trieste (Italy), 12-16 May 2008; Other Information: DOI: 10.1063/1.3013043; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
DRELL MODEL
ELECTROMAGNETIC FORM FACTORS
ENERGY CONSERVATION
FLAVOR MODEL
HEAVY ION REACTIONS
LIGHT CONE
PARTICLE PRODUCTION
PHOTONS
PROTONS
QUANTUM CHROMODYNAMICS