Interações efetivas entre quarks a baixas energias a partir da Cromodinâmica Quântica considerando o condensado de quark-antiquark
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Data
2014-02-17
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Universidade Federal de Goiás
Resumo
The 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.
Descrição
Palavras-chave
Cromodinâmica quântica , Quarks , Glúons , Energias , Quantum chromodynamics , Quarks , Gluons , Energies
Citação
PULO 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.