May 13 – 19, 2018
Venice, Italy
Europe/Zurich timezone
The organisers warmly thank all participants for such a lively QM2018! See you in China in 2019!

In-medium spectral functions of hadrons with the Functional Renormalization Group

May 14, 2018, 5:50 PM
Sala Casinò, 1st Floor (Palazzo del Casinò)

Sala Casinò, 1st Floor

Palazzo del Casinò

Parallel Talk Electromagnetic and weak probes Electromagnetic and weak probes


Dr Ralf-Arno Tripolt (ECT*)


We present an overview of recent results on in-medium spectral functions and transport coefficients of hadrons using the Functional Renormalization Group approach. Our method is based on a recently developed analytic continuation procedure that allows to calculate real-time quantities like spectral functions at finite temperature and chemical potential. Results for the quark, the sigma and the pion spectral function as well as for the shear viscosity over entropy density ratio are shown using the quark-meson model [1]. These quantities are studied in different regimes of the phase diagram, in particular near the chiral critical endpoint. Moreover, recent results for in-medium vector and axial-vector meson spectral functions are presented which are based on an extended linear-sigma model including quarks [2]. It is shown how the rho and the a1 spectral functions become degenerate at high temperatures and chemical potentials due to the restoration of chiral symmetry. Future applications of these recent developments are discussed, which include the calculation of dilepton spectra and the identification of experimental signatures of the chiral phase transition in the QCD phase diagram.

[1] R.-A. Tripolt, L. von Smekal, J. Wambach, Int. J. Mod. Phys. E26 (2017) 1740028
[2] C. Jung, F. Rennecke, R.-A. Tripolt, L. von Smekal, J. Wambach, Phys. Rev. D 95 (2017) 036020

Content type Theory
Centralised submission by Collaboration Presenter name already specified

Primary authors

Dr Ralf-Arno Tripolt (ECT*) Mr Christopher Jung (Justus-Liebig University Giessen) Dr Fabian Rennecke (BNL and University of Heidelberg) Prof. Lorenz von Smekal (Justus-Liebig University Giessen) Prof. Jochen Wambach (ECT* and TU Darmstadt) Mr Johannes Weyrich (Justus-Liebig University Giessen)

Presentation materials