C. A. Linhares

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hep-th2006

Asymptotic Expansions of Feynman Amplitudes in a Generic Covariant Gauge

C. A. Linhares, A. P. C. Malbouisson, I. Roditi

We show in this paper how to construct Symanzik polynomials and the Schwinger parametric representation of Feynman amplitudes for gauge theories in an unspecified covariant gauge.…

hep-th2003

First-order phase transitions in confined systems

C. A. Linhares, A. P. C. Malbouisson, I. Roditi

In a field-theoretical context, we consider the Euclidean $(ϕ^{4} + ϕ^{6})_{D}$ model compactified in one of the spatial dimensions. We are able to determine the dependence of the transiti…