Münster 2017 – wissenschaftliches Programm

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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 Jung1,2, Fabian Rennecke1,3, Ralf-Arno Tripolt4, Lorenz von Smekal1, and Jochen Wambach2,41Justus-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)

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