A1 Journal article (refereed)
Plasmon mass scale in two-dimensional classical nonequilibrium gauge theory (2018)

Lappi, T., & Peuron, J. (2018). Plasmon mass scale in two-dimensional classical nonequilibrium gauge theory. Physical Review D, 97(1), 034017. https://doi.org/10.1103/PhysRevD.97.034017

JYU authors or editors

Publication details

All authors or editorsLappi, Tuomas; Peuron, Jarkko

Journal or seriesPhysical Review D



Publication year2018


Issue number1

Pages range034017

PublisherAmerican Physical Society

Publication countryUnited States

Publication languageEnglish


Publication open accessOpenly available

Publication channel open accessPartially open access channel

Publication is parallel published (JYX)https://jyx.jyu.fi/handle/123456789/57110


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.

Keywordsparticle physics

Free keywordsplasmon mass; heavy-ion collisions; gauge theory

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Ministry reportingYes

Reporting Year2018

JUFO rating2

Last updated on 2024-11-05 at 20:06