Spectral function of fermions in a highly occupied non-Abelian plasma
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...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-04-01
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| Series: | Physics Letters B |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269322000971 |
| _version_ | 1818284391098482688 |
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| author | K. Boguslavski T. Lappi M. Mace S. Schlichting |
| author_facet | K. Boguslavski T. Lappi M. Mace S. Schlichting |
| author_sort | K. Boguslavski |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-12-13T00:52:03Z |
| format | Article |
| id | doaj.art-0349b1a1722b4c9c9efa99017bd0d716 |
| institution | Directory Open Access Journal |
| issn | 0370-2693 |
| language | English |
| last_indexed | 2024-12-13T00:52:03Z |
| publishDate | 2022-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-0349b1a1722b4c9c9efa99017bd0d7162022-12-22T00:04:54ZengElsevierPhysics Letters B0370-26932022-04-01827136963Spectral function of fermions in a highly occupied non-Abelian plasmaK. Boguslavski0T. Lappi1M. Mace2S. Schlichting3Institute for Theoretical Physics, Technische Universität Wien, Wiedner Hauptstr. 8-10, 1040, Vienna, Austria; Corresponding author.Department of Physics, University of Jyväskylä, P.O. Box 35, 40014, University of Jyväskylä, Finland; Helsinki Institute of Physics, P.O. Box 64, 00014, University of Helsinki, FinlandDepartment of Physics, University of Jyväskylä, P.O. Box 35, 40014, University of Jyväskylä, Finland; Helsinki Institute of Physics, P.O. Box 64, 00014, University of Helsinki, FinlandFakultät für Physik, Universität Bielefeld, 33615, Bielefeld, GermanyWe 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.http://www.sciencedirect.com/science/article/pii/S0370269322000971Quark-gluon plasmaHeavy-ion collisionsNonequilibrium QFTThermal QFTSpectral functionHard-thermal loop |
| spellingShingle | K. Boguslavski T. Lappi M. Mace S. Schlichting Spectral function of fermions in a highly occupied non-Abelian plasma Physics Letters B Quark-gluon plasma Heavy-ion collisions Nonequilibrium QFT Thermal QFT Spectral function Hard-thermal loop |
| title | Spectral function of fermions in a highly occupied non-Abelian plasma |
| title_full | Spectral function of fermions in a highly occupied non-Abelian plasma |
| title_fullStr | Spectral function of fermions in a highly occupied non-Abelian plasma |
| title_full_unstemmed | Spectral function of fermions in a highly occupied non-Abelian plasma |
| title_short | Spectral function of fermions in a highly occupied non-Abelian plasma |
| title_sort | spectral function of fermions in a highly occupied non abelian plasma |
| topic | Quark-gluon plasma Heavy-ion collisions Nonequilibrium QFT Thermal QFT Spectral function Hard-thermal loop |
| url | http://www.sciencedirect.com/science/article/pii/S0370269322000971 |
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