Tripolt, Ralf-Arno ; Rischke, Dirk H. ; Smekal, Lorenz von ; Wambach, Jochen (2022):
Fermionic excitations at finite temperature and density. (Publisher's Version)
In: Physical Review D, 101 (9), American Physical Society, ISSN 2470-0010, e-ISSN 2470-0029,
DOI: 10.26083/tuprints-00012673,
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Item Type: | Article |
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Origin: | Secondary publication |
Status: | Publisher's Version |
Title: | Fermionic excitations at finite temperature and density |
Language: | English |
Abstract: | We study fermionic excitations in a hot and dense strongly interacting medium consisting of quarks and (pseudo-)scalar mesons. In particular, we use the two-flavor quark-meson model in combination with the functional renormalization group (FRG) approach, which allows to take into account the effects from thermal and quantum fluctuations. The resulting fermionic excitation spectrum is investigated by calculating the quark spectral function at finite temperature, quark chemical potential, and spatial momentum. This involves an analytic continuation from imaginary to real energies by extending the previously introduced analytically continued FRG method to the present case. We identify three different collective excitations in the medium: the ordinary thermal quark, the plasmino mode, and an ultrasoft “phonino” mode. The dispersion relations of these modes are extracted from the quark spectral function. When compared to corresponding results from an FRG-improved one-loop calculation, a remarkable agreement has been found. |
Journal or Publication Title: | Physical Review D |
Volume of the journal: | 101 |
Issue Number: | 9 |
Place of Publication: | Darmstadt |
Publisher: | American Physical Society |
Collation: | 17 Seiten |
Classification DDC: | 500 Naturwissenschaften und Mathematik > 530 Physik |
Divisions: | 05 Department of Physics > Institute of Nuclear Physics 05 Department of Physics > Institute of Nuclear Physics > Theoretische Kernphysik 05 Department of Physics > Institute of Nuclear Physics > Theoretische Kernphysik > Kern- und Hadronenphysik |
Date Deposited: | 08 Mar 2022 12:18 |
Last Modified: | 22 Feb 2023 07:20 |
DOI: | 10.26083/tuprints-00012673 |
Corresponding Links: | |
URN: | urn:nbn:de:tuda-tuprints-126737 |
URI: | https://tuprints.ulb.tu-darmstadt.de/id/eprint/12673 |
PPN: | 50518740X |
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