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

Abstract : 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.
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Submitted on : Thursday, June 16, 2016 - 2:07:59 PM
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Jens Braun, Leonard Fister, Jan M. Pawlowski, Fabian Rennecke. From Quarks and Gluons to Hadrons: Chiral Symmetry Breaking in Dynamical QCD. Physical Review D, American Physical Society, 2016, 94, pp.034016. ⟨10.1103/PhysRevD.94.034016⟩. ⟨cea-01332724⟩

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