Correções radiativas ao modelo de Gribov-Zwanziger refinado

• Autor(a) principal: Silva, Apóllo Vitalino da
• Data de Publicação: 2023
• Outros Autores: [e-mail]
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da UERJ
• Texto Completo: http://www.bdtd.uerj.br/handle/1/20264
• topic: Quantum field theory; Quantum chromodynamics; Yang-Mills theory; Confinement (Nuclear physics); Gluons; Radiative corrections; Gribov-Zwanziger; Lattice QCD; Teoria quântica de campos; Cromodinâmica quântica; Yang-Mills, Teoria; Confinamento (Física nuclear); Gluons; Correções radiativas; Gribov-Zwanziger; QCD na rede; CIENCIAS EXATAS E DA TERRA::FISICA::FISICA DAS PARTICULAS ELEMENTARES E CAMPOS

The phenomenon of confinement is still an open problem and therefore many models and/or methods are proposed to try to explain it. The Gribov-Zwanziguer (GZ) model is one example of this, proposed to try to describe the gluon propagator. However, it was shown to be incompatible when comparing with the lattice QCD results, which is at the moment our well-established source of comparison for non-perturbative approaches. This model underwent a refinement giving rise to what we call the Refined Gribov-Zwanziguer theory (or RGZ model). The RGZ model presents, for the tree level gluon propagator, an excellent agreement with the lattice data for a range of low moment values. Therefore, in this work we will present some techniques and tools used to calculate corrections to the 1-loop propagator that the RGZ model presents. As these calculations are too laborious and complex, we will propose a way to automate them to achieve the goal of obtaining these corrections.