Statut  Confirmé 
Série  APCTH 
Domaines  hepth 
Date  Mardi 20 Novembre 2018 
Heure  14:00 
Institut  APC 
Salle  646 A  Mondrian 
Nom de l'orateur  Peláez 
Prenom de l'orateur  Marcela 
Addresse email de l'orateur  
Institution de l'orateur  Universidad de la Republica, Montevideo 
Titre  Perturbative study of infrared QCD 
Résumé  Quantum Chromodynamics, the microscopic theory of strong interaction, is asymptotically free. As a consequence, perturbation theory is a useful tool to study high energy phenomena. In the opposite regime, the infrared, QCD is believed to be nonperturbative. However, last decade lattice simulations have showed that the coupling constant is finite in the infrared and not so big. That makes us think that some features of infrared QCD could be understood using perturbation theory. Moreover, the completely gaugefixed Lagrangian is not known in the infrared. We propose then to use a gaugefixed Lagrangian motivated by lattice simulations and use perturbation theory to study the infrared. We find that the first loop correction for YangMills propagators and vertices reproduces lattice results with great accuracy. In addition, I will present preliminary results for the two loop corrections which confirm the validity of perturbation theory in order to study of YangMills quantities. 
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