2014-09-152014-02-17PULO JUNIOR, Ademar. Interações efetivas entre quarks a baixas energias a partir da Cromodinâmica Quântica considerando o condensado de quark-antiquark. 2014. 91 f. Dissertação (Mestrado em Física) - Universidade Federal de Goiás, Goiânia, 2014.http://repositorio.bc.ufg.br/tede/handle/tede/3064The Quantum Chromodynamics (QCD) is the current theory that aim to describe the strong interactions in the Standard Model. It is a non-abelian gauge theory where quarks and gluons are the fundamental particles. However, QCD exhibits difficulties when low energy regimes are considered and perturbative methods cannot be employed. Thus, effective models are extremely important and useful when low energy limits are considered. Starting with QCD we develop an effetive model taking into account the second order gluon condensate, ⟨Aa A a ⟩, and quark-antiquark, ⟨ qq⟩. The coupled GAP equations are derived for Ns = 3 and numerical solutions are found for that. Furthermore, a functional expansion from effective potencial to the sixth order is calculated and contributions from that terms inserted into the effective lagrangian.application/pdfAcesso AbertoCromodinâmica quânticaQuarksGlúonsEnergiasQuantum chromodynamicsQuarksGluonsEnergiesFISICA GERAL::FISICA CLASSICA E FISICA QUANTICA; MECANICA E CAMPOSDissertação