From Quarks and Gluons to Hadrons: Chiral Symmetry Breaking in Dynamical QCD

Jens Braun (1, 2) , Leonard Fister (3) , Jan M. Pawlowski (4, 1) , Fabian Rennecke (1, 4)

1 EMMI - ExtreMe Matter Institute
2 Institut für Kernphysik [Darmstadt]
3 IPHT - Institut de Physique Théorique - UMR CNRS 3681
4 Institut fur Theoretische Physik

We present an analysis of the dynamics of two-flavour QCD in the vacuum. Special attention is payed to the transition from the high energy quark-gluon regime to the low energy regime governed by hadron dynamics. This is done within a functional renormalisation group approach to QCD amended by dynamical hadronisation techniques. The latter allow us to describe conveniently the transition from the perturbative high-energy regime to the nonperturbative low-energy limit without suffering from a fine-tuning of model parameters. In the present work, we apply these techniques to two-flavour QCD with physical quark masses and show how the dynamics of the dominant low-energy degrees of freedom emerge from the underlying quark-gluon dynamics.

Domains: High Energy Physics - Phenomenology [hep-ph]; High Energy Physics - Theory [hep-th]; Nuclear Theory [nucl-th]

Jens Braun, Leonard Fister, Jan M. Pawlowski, Fabian Rennecke. From Quarks and Gluons to Hadrons: Chiral Symmetry Breaking in Dynamical QCD. Physical Review D, 2016, 94, pp.034016. ⟨10.1103/PhysRevD.94.034016⟩. ⟨cea-01332724⟩