The Two-loop Massless phi^4 Model in Non-translational Invariant Domain

Details The Two-loop Massless phi^4 Model in Non-translational Invariant Domain The Two-loop Massless phi^4 Model in Non-translational Invariant Domain

2005-12-08

arxiv.org/abs/hep-th/0512100v1

J.Math.Phys.47:052303,2006

Physics

High Energy Physics

High Energy Physics - Theory

14 pages, LaTex

Scientific paper

10.1063/1.2194632

We study the $\frac{\lambda}{4!}\phi^{4}$ massless scalar field theory in a four-dimensional Euclidean space, where all but one of the coordinates are unbounded. We are considering Dirichlet boundary conditions in two hyperplanes, breaking the translation invariance of the system. We show how to implement the perturbative renormalization up to two-loop level of the theory. First, analyzing the full two and four-point functions at the one-loop level, we shown that the bulk counterterms are sufficient to render the theory finite. Meanwhile, at the two-loop level, we have to introduce also surface counterterms in the bare lagrangian in order to make finite the full two and also four-point Schwinger functions.

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