An adiabatic approximation to the path integral for relativistic fermionic fields

Cortes, J.L. (Universidad de Zaragoza) ; Gamboa, J. ; Lepe, S. ; Lopez Sarrion, J.

Resumen: A new approach to the path integral over fermionic fields, based on the extension of a reformulation of the adiabatic approximation to some quantum-mechanical systems, is presented. A novel non-analytic contribution to the effective fermionic action for a fermion field coupled to a non-Abelian vector field is identified. The possible interpretation of this contribution as a violation of the decoupling theorem in quantum field theory (QFT) is discussed. The generalization of the approach to the case of finite temperature and density suggests the possibility to apply it to the understanding of non-perturbative properties in QFT and their dependence on temperature and density.

Idioma: Inglés

DOI: 10.1016/j.physletb.2005.04.044

Año: 2005

Publicado en: Physics Letters B 619, 3-4 (2005), 367-376
ISSN: 0370-2693

Factor impacto JCR: 5.301 (2005)

Categ. JCR: PHYSICS, MULTIDISCIPLINARY rank: 6 / 68 = 0.088 (2005) - Q1 - T1

Financiación: info:eu-repo/grantAgreement/ES/MCYT/FPA2003-02948

Tipo y forma: Article (Published version)

Área (Departamento): Área Física Teórica (Dpto. Física Teórica)