The role of the quark-gluon vertex function in the QCD phase transition

20 May 2014, 16:30
spectrum (darmstadtium)



Board: A-09
Poster QCD at High Temperature and/or Density Poster session


Markus Hopfer (Karl-Franzens University Graz)


The quark-gluon vertex function, describing the (non-perturbative) interactions of quarks with gluons, plays a central role in and is subject to dynamical chiral symmetry breaking. Accordingly, its change across the QCD crossover transition drives on the one hand important aspects of the phase transition and on the other hand its structure changes substantially. Results for the quark-gluon vertex at vanishing temperature within the Dyson-Schwinger formalism in Landau gauge are presented and a generalization to non-vanishing temperatures is discussed. A simplified system (scalar QCD) is investigated at both vanishing and non-vanishing temperatures. This allows to introduce a novel order parameter for the center phase transition.
On behalf of collaboration: None

Primary author

Markus Hopfer (Karl-Franzens University Graz)


Andreas Windisch (University of Graz) Bernd-Jochen Schaefer Gernot Eichmann Mario Mitter (U) Reinhard Alkofer (U)

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