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Communication Dans Un Congrès Année : 2020

The massive gluon and the massless pion

Résumé

Lattice simulations of Yang-Mills theories and QCD in the Landau gauge demonstrate that the gluon propagator reaches a finite nonzero value at vanishing momentum. This can be modelled by a simple deformation of the corresponding Faddeev-Popov Lagrangian known as the Curci-Ferrari model. The latter does not modify the known ultraviolet regime of the theory and provides a successful perturbative description of essential aspects of the non-Abelian dynamics in the infrared regime, where, in particular, the coupling remains finite, as also seen in lattice simulations. This opens the possibility of a controlled (semi)perturbative description of various aspects of the infrared QCD dynamics, including correlation functions and the deconfinement phase transition at finite temperature and density. I present recent progress concerning the description of chiral symmetry breaking in this context.

Dates et versions

hal-02870782 , version 1 (16-06-2020)

Identifiants

Citer

Julien Serreau. The massive gluon and the massless pion. QCD on the light cone: from hadrons to heavy ions, Sep 2019, Palaiseau, France. pp.080, ⟨10.22323/1.374.0080⟩. ⟨hal-02870782⟩
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