Plasmon mass scale in two-dimensional classical nonequilibrium gauge theory

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http://hdl.handle.net/10138/251196

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Lappi , T & Peuron , J 2018 , ' Plasmon mass scale in two-dimensional classical nonequilibrium gauge theory ' , Physical Review D , vol. 97 , no. 3 , 034017 . https://doi.org/10.1103/PhysRevD.97.034017

Title: Plasmon mass scale in two-dimensional classical nonequilibrium gauge theory
Author: Lappi, T.; Peuron, J.
Contributor: University of Helsinki, Helsinki Institute of Physics
University of Helsinki, University of Jyväskylä
Date: 2018-02-15
Language: eng
Number of pages: 12
Belongs to series: Physical Review D
ISSN: 2470-0010
URI: http://hdl.handle.net/10138/251196
Abstract: We study the plasmon mass scale in classical gluodynamics in a two-dimensional configuration that mimics the boost-invariant initial color fields in a heavy-ion collision. We numerically measure the plasmon mass scale using three different methods: a hard thermal loop (HTL) expression involving the quasiparticle spectrum constructed from Coulomb gauge field correlators, an effective dispersion relation, and the measurement of oscillations between electric and magnetic energies after introducing a spatially uniform perturbation to the electric field. We find that the HTL expression and the uniform electric field measurement are in rough agreement. The effective dispersion relation agrees with other methods within a factor of 2. We also study the dependence on time and occupation number, observing similar trends as in three spatial dimensions, where a power-law dependence sets in after an occupation-number-dependent transient time. We observe a decrease of the plasmon mass squared as t(-1/3) at late times.
Subject: HEAVY-ION COLLISIONS
GLUON PRODUCTION
ISOTROPIZATION
GLASMA
INSTABILITIES
FLUCTUATIONS
EVOLUTION
LATTICE
114 Physical sciences
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