Spectral function of fermions in a highly occupied non-Abelian plasma
Abstract
We develop a method to obtain fermion spectral functions non-perturbatively in a non-Abelian gauge theory with high occupation numbers of gauge fields. After recovering the free field case, we extract the spectral function of fermions in a highly occupied non-Abelian plasma close to its non-thermal fixed point, i.e., in a self-similar regime of the non-equilibrium dynamics. We find good agreement with hard loop perturbation theory for medium-induced masses, dispersion relations and quasiparticle residues. We also extract the full momentum dependence of the damping rate of the collective excitations.
Main Authors
Format
Articles
Research article
Published
2022
Series
Subjects
Publication in research information system
Publisher
Elsevier BV
The permanent address of the publication
https://urn.fi/URN:NBN:fi:jyu-202204272428Use this for linking
Review status
Peer reviewed
ISSN
0370-2693
DOI
https://doi.org/10.1016/j.physletb.2022.136963
Language
English
Published in
Physics Letters B
Citation
- Boguslavski, K., Lappi, T., Mace, M., & Schlichting, S. (2022). Spectral function of fermions in a highly occupied non-Abelian plasma. Physics Letters B, 827, Article 136963. https://doi.org/10.1016/j.physletb.2022.136963
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Funder(s)
Research Council of Finland
European Commission
European Commission
Funding program(s)
Academy Project, AoF
RIA Research and Innovation Action, H2020
ERC European Research Council, H2020
Akatemiahanke, SA
RIA Research and Innovation Action, H2020
ERC European Research Council, H2020
Funded by the European Union. Views and opinions expressed are however those of the author(s) only and do not necessarily reflect those of the European Union or the European Education and Culture Executive Agency (EACEA). Neither the European Union nor EACEA can be held responsible for them.
Additional information about funding
This work has been supported by the European Research Council under grant no. ERC-2015-CoG-681707, by the EU Horizon 2020 research and innovation programme, STRONG-2020 project (grant agreement No 824093) by the Academy of Finland, project 321840, by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) through the CRC-TR 211 “Strong-interaction matter under extreme conditions” Project number 315477589, and by the Austrian Science Fund (FWF) under project P34455-N. We gratefully acknowledge the National Energy Research Scientific Computing Center, a U.S. Department of Energy Office of Science User Facility supported under Contract No. DE-AC02-05CH11231, the Vienna Scientific Cluster (VSC), Austria, (project 71444), and CSC - IT Center for Science, Finland, for providing computational resources. The content of this article does not reflect the official opinion of the European Union and responsibility for the information and views expressed therein lies entirely with the authors.
Copyright© 2022 The Author(s). Published by Elsevier B.V.