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HK: Fachverband Physik der Hadronen und Kerne

HK 40: Heavy Ion Collisions and QCD Phases IX

HK 40.4: Vortrag

Donnerstag, 30. März 2017, 14:45–15:00, F 3

In-Medium Spectral Functions of Vector- and Axial-Vector Mesons from the Functional Renormalization Group — •Christopher Jung^1,2, Fabian Rennecke^1,3, Ralf-Arno Tripolt⁴, Lorenz von Smekal¹, and Jochen Wambach^2,4 — ¹Justus-Liebig-Universitaet Giessen, Germany — ²TU Darmstadt, Germany — ³Ruprecht-Karls-Universitaet Heidelberg, Germany — ⁴ECT*, Italy

We present first results on vector and axial-vector meson spectral functions as obtained by applying the non-perturbative 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 ρ and a₁ 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. (arXiv:1610.08754)