Journalartikel

Jahr der Veröffentlichung: 2017

Zeitschrift: Physical Review D

Bandnummer: 95

Heftnummer: 3

ISSN: 2470-0010

eISSN: 2470-0029

Open Access Status: Green

DOI Link: https://doi.org/10.1103/PhysRevD.95.036020

Verlag: American Physical Society

Abstract: 
In this work, we present the first results on vector-and axial-vector meson spectral functions as obtained by applying the nonperturbative functional renormalization group approach to an effective low-energy theory motivated by the gauged linear sigma model. By using a recently proposed analytic continuation method, we study the in-medium behavior of the spectral functions of the rho and a(1) mesons in different regimes of the phase diagram. In particular, we demonstrate explicitly how these spectral functions degenerate at high temperatures as well as at large chemical potentials, as a consequence of the restoration of chiral symmetry. In addition, we also compute the momentum dependence of the rho and a(1) spectral functions and discuss the various timelike and spacelike processes that can occur.

Harvard-Zitierstil: Jung, C., Rennecke, F., Tripolt, R., von Smekal, L. and Wambach, J. (2017) In-medium spectral functions of vector- and axial-vector mesons from the functional renormalization group, Physical Review D, 95(3), Article 036020. https://doi.org/10.1103/PhysRevD.95.036020

APA-Zitierstil: Jung, C., Rennecke, F., Tripolt, R., von Smekal, L., & Wambach, J. (2017). In-medium spectral functions of vector- and axial-vector mesons from the functional renormalization group. Physical Review D. 95(3), Article 036020. https://doi.org/10.1103/PhysRevD.95.036020