Glasma Evolution and Bose-Einstein Condensation with Elastic and Inelastic Collisions

Abstract

In this paper we investigate the role of inelastic collisions in the kinetic evolution of a highly overpopulated gluon system starting from Glasma-type initial condition. Using the Gunion-Bertsch formula we derive the inelastic collision kernel under the collinear and small angle approximations. With both numerics and analytic analysis, we show that the inelastic process has two effects: globally changing (mostly reducing) the total particle number, while locally at small momentum regime always filling up the infrared modes extremely quickly. This latter effect is found to significantly speed up the emergence of a local thermal distribution in the infrared regime with vanishing local "chemical potential" and thus catalyze the onset of dynamical Bose-Einstein Condensation to occur faster (as compared with the purely elastic case) in the overpopulated Glasma.

V4:34 pages, 12 figures, matches published version

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• Chemical Equilibration in Weakly Coupled QCD
• Gluon Transport Equation in the Small Angle Approximation and the Onset of Bose-Einstein Condensation
• Nonequilibrium fixed points in longitudinally expanding scalar theories: infrared cascade, Bose condensation and a challenge for kinetic theory
• The thermalization of soft modes in non-expanding isotropic quark gluon plasmas
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• Kinetic description of Bose-Einstein condensation with test particle simulations
• Photons from thermalizing matter in heavy ion collisions
• Gluon Transport Equation with Effective Mass and Dynamical Onset of Bose-Einstein Condensation
• Pion transverse-momentum spectrum and elliptic anisotropy of partially coherent source
• Thermalization of gluons in spatially homogeneous systems
• Kinetic approach to a relativistic Bose-Einstein condensate
• Gluon Transport Equations with Condensate in the Small Angle Approximation
• The subtle interplay of elastic and inelastic collisions in the thermalization of the quark-gluon plasma
• Kinetic approach to a relativistic BEC with inelastic processes
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• Nonlocal wave turbulence in non-Abelian plasmas
• Equilibrium and equilibration in a gluon plasma with improved matrix elements
• The Extraordinary Glow
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