TU Darmstadt / ULB / TUprints

Fermionic excitations at finite temperature and density

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,
[Article]

[img]
Preview
Text
PhysRevD.101.094010.pdf
Available under: CC BY 4.0 International - Creative Commons, Attribution.

Download (2MB) | Preview
Item Type: Article
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
Journal volume: 101
Issue Number: 9
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: 10 Mar 2022 09:54
DOI: 10.26083/tuprints-00012673
Corresponding Links:
URN: urn:nbn:de:tuda-tuprints-126737
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/12673
Export:
Actions (login required)
View Item View Item