Fermion and gluon spectral functions far from equilibrium
1 Institute for Theoretical Physics, Technische Universität Wien, 1040 Vienna, Austria
2 Department of Physics, University of Jyväskylä, P.O. Box 35, 40014, Finland
3 Helsinki Institute of Physics, University of Helsinki, P.O. Box 64, 00014, Finland
4 Fakultät für Physik, Universität Bielefeld, D-33615 Bielefeld, Germany
* Speaker, e-mail: firstname.lastname@example.org
Published online: 11 January 2022
Motivated by the quark-gluon plasma, we develop a simulation method to obtain the spectral function of (Wilson) fermions non-perturbatively in a non-Abelian gauge theory with large gluon occupation numbers . We apply our method to a non-Abelian plasma close to its non-thermal fixed point, i.e., in a far-from-equilibrium self-similar regime, and find mostly very good agreement with perturbative hard loop (HTL) calculations. For the first time, we extract the full momentum dependence of the damping rate of fermionic collective excitations and compare our results to recent non-perturbative extractions of gluonic spectral functions in two and three spatial dimensions [2, 3].
© The Authors, published by EDP Sciences, 2022
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