Multi-particle Production and Thermalization in High-Energy QCD

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dc.creatorKharzeev, Dmitri
dc.creatorLevin, Eugene
dc.creatorTuchin, Kirill
dc.date2006-02-07
dc.date2007-02-28
dc.date.accessioned2026-07-07T10:29:51Z
dc.date.available2026-07-07T10:29:51Z
dc.descriptionWe argue that multi-particle production in high energy hadron and nuclear collisions can be considered as proceeding through the production of gluons in the background classical field. In this approach we derive the gluon spectrum immediately after the collision and find that at high energies it is parametrically enhanced by ln(1/x) with respect to the quasi-classical result (x is the Bjorken variable). We show that the produced gluon spectrum becomes thermal (in three dimensions) with an effective temperature determined by the saturation momentum Qs, T= c Qs/2pi during the time ~1/T; we estimate c=sqrt{2pi}/2 ~ 1.2. Although this result by itself does not imply that the gluon spectrum will remain thermal at later times, it has an interesting applications to heavy ion collisions. In particular, we discuss the possibility of Bose-Einstein condensation of the produced gluon pairs and estimate the viscosity of the produced gluon system.
dc.description25 pages, 4 figures; typos fixed; discussions expanded; we added a new section IV in which we argue that at high energies the production mechanism discussed in the paper is parametrically enhanced by ln(1/x) with respect to the quasi-classical result
dc.identifierhttps://arxiv.org/abs/hep-ph/0602063
dc.identifierhttp://arxiv.org/abs/hep-ph/0602063
dc.identifierPhys.Rev.C75:044903,2007
dc.identifierdoi:10.1103/PhysRevC.75.044903
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/177953
dc.subjectHigh Energy Physics - Phenomenology
dc.titleMulti-particle Production and Thermalization in High-Energy QCD
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