2017/03/31 by Naoto Tanji, Raju Venugopalan
Physics and Astronomy · #Classical mechanics #Economics #Environmental science #High-Energy Particle Collisions Research #Kinetic energy #Physics #hep-ph #nucl-th
paper · pdf · doi:10.1103/physrevd.95.094009
published as Phys. Rev. D 95, 094009 (2017) · 34 pages, 21 figures; version accepted in PRD
arxiv created 2017/05/12 · openalex publication_date 2017/05/19 · arxiv updated 2017/05/24 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We report on a numerical study of the Boltzmann equation including 2\ensuremath↔2 scatterings of gluons and quarks in an overoccupied glasma undergoing longitudinal expansion. We find that when a cascade of gluon number to the infrared occurs, corresponding to an infrared enhancement analogous to a transient Bose-Einstein condensate, gluon distributions qualitatively reproduce the results of classical-statistical simulations for the expanding glasma. These include key features of the distributions that are not anticipated in the ``bottom-up'' thermalization scenario. We also find that quark distributions, like those of gluons, satisfy self-similar scaling distributions in the overoccupied glasma. We discuss the implications of these results for a deeper understanding of the self-similarity and universality of parton distributions in the glasma.