Effective kinetic description of the expanding overoccupied glasma
We report on a numerical study of the Boltzmann equation including 2↔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 B...
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| Main Authors: | , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
19 May 2017
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| In: |
Physical review
Year: 2017, Volume: 95, Issue: 9 |
| ISSN: | 2470-0029 |
| DOI: | 10.1103/PhysRevD.95.094009 |
| Online Access: | Verlag, Volltext: http://dx.doi.org/10.1103/PhysRevD.95.094009 Verlag, Volltext: https://link.aps.org/doi/10.1103/PhysRevD.95.094009 
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| Author Notes: | Naoto Tanji, Raju Venugopalan |
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| 520 | |a We report on a numerical study of the Boltzmann equation including 2↔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. | ||
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