Mainz 2014 – scientific programme

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T: Fachverband Teilchenphysik

T 110: Quantenfeldtheorie 2

T 110.1: Talk

Thursday, March 27, 2014, 16:45–17:00, P15

Spectral Functions from the Functional Renormalization Group — •Nils Strodthoff¹ and Jan M. Pawlowski^1,2 — ¹Institut für Theoretische Physik, Universität Heidelberg, Germany — ²ExtreMe Matter Institute EMMI, GSI Darmstadt, Germany

Spectral functions are important observables as they do not only encode information about the particle spectrum but also serve as input for calculations of transport coefficients such as the shear viscosity. Their calculation, however, is a difficult task in Euclidean approaches as it involves an analytical continuation from Euclidean to Minkowski external momentum. Within the framework of the Functional Renormalization Group we present an entirely numerical procedure where the analytical continuation is carried out on the level of the flow equations. As an example we consider mesonic spectral functions in effective models for QCD.