Document Type

Article

Publication Version

Published Version

Publication Date

2007

Journal or Book Title

Physical Review C

Volume

75

Issue

4

First Page

044903-1

Last Page

044903-13

DOI

10.1103/PhysRevC.75.044903

Abstract

We argue that multiparticle 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 quasiclassical 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=cQs/2π during the time ∼1/T; we estimate c=2π/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.

Comments

This article is from Physical Review C 75 (2007): 044903, doi: 10.1103/PhysRevC.75.044903. Posted with permission.

Copyright Owner

American Physical Society

Language

en

File Format

application/pdf

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