Spectral function for overoccupied gluodynamics from real-time lattice simulations

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http://hdl.handle.net/10138/237857

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Boguslayski , K , Kurkela , A , Lappi , T & Peuron , J 2018 , ' Spectral function for overoccupied gluodynamics from real-time lattice simulations ' , Physical Review D , vol. 98 , no. 1 , 014006 . https://doi.org/10.1103/PhysRevD.98.014006

Title: Spectral function for overoccupied gluodynamics from real-time lattice simulations
Author: Boguslayski, K.; Kurkela, A.; Lappi, T.; Peuron, J.
Contributor: University of Helsinki, Helsinki Institute of Physics
University of Helsinki, University of Jyväskylä
Date: 2018-07-06
Language: eng
Number of pages: 20
Belongs to series: Physical Review D
ISSN: 2470-0010
URI: http://hdl.handle.net/10138/237857
Abstract: We study the spectral properties of a highly occupied non-Abelian nonequilibrium plasma appearing ubiquitously in weak coupling descriptions of QCD matter. The spectral function of this far-from-equilibrium plasma is measured by employing linear response theory in classical-statistical real-time lattice Yang-Mills simulations. We establish the existence of transversely and longitudinally polarized quasi-particles and obtain their dispersion relations, effective mass, plasmon frequency, damping rate and further structures in the spectral and statistical functions. Our new method can be interpreted as a nonperturbative generalization of hard thermal loop (HTL) effective theory. We see indications that our results approach leading order HTL in the appropriate limit. The method can also be employed beyond the range of validity of HTL.
Subject: QCD PLASMA INSTABILITIES
HEAVY-ION COLLISIONS
QUARK-GLUON PLASMA
HARD THERMAL LOOPS
HIGH-TEMPERATURE
CLASSICAL APPROXIMATION
QUANTUM CHROMODYNAMICS
GAUGE-THEORIES
FIELD-THEORY
ISOTROPIZATION
114 Physical sciences
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