Non-Perturbative QFT in Euclidean and Minkowski

Session

Propagators and Vertices

11 Sept 2019, 09:00

E10.B

12. Nakanishi representation for propagators

Vladimir Sauli

11/09/2019, 09:00

The definition and the way to extract Nakanishi representation for propagators and triple vertices in Gauge Theories will be presented during the talk. How they can be usefull for calculation of meson electromagnetic form factors in Minkowski space will be ilustrated in cases of the VHP and the pion TFF.

16. Spectral functions from the Functional Renormalization Group

Nicolas Wink

11/09/2019, 09:50

We review some general aspects of calculations in Minkowski space-time with Functional Methods with a focus on the Functional Renormalization Group.
In particular the implications of having an momentum dependent regulator present are discussed and results for a scalar theory are presented.
Insights from calculations are used to construct improved methods for spectral reconstructions,...

17. Propagators and vertices from lattice QCD

Jon-Ivar Skullerud (National University of Ireland Maynooth)

11/09/2019, 11:00

I will present an overview of results for gluon, ghost and quark propagators and veretices from lattice QCD, and discuss what this may tell us about their analytic structure.

18. Continuum Limit of Gluon and Ghost Propagators in Minimal Landau Gauge

Attilio Cucchieri, Tereza Mendes

11/09/2019, 13:30

We study the continuum limit of SU(2) Landau-gauge gluon and ghost propagators, obtained from numerical simulations performed on lattice volumes of up to $192^4$, in the scaling region.

4. The Complex Gluon, Ghost and Higgs

David Dudal

11/09/2019, 14:20

We discuss how to extract from lattice data information about the (unphysical as gauge variant) spectral representation of gluons and ghosts using a regularized inversion strategy, compatible with the standard Källen-Lehmann spectral integral, whilst allowing generalizations thereof, namely with non-positive density and/or complex conjugate poles.

We also discuss how to introduce gauge...