Non-perturbative construction of counterterms for 2PI-approximation
Abstract
A concise method is presented for the non-perturbative computation of the counterterms renormalising 2PI-actions. The procedure is presented for a real scalar field up to lambda2 order in the skeleton truncation of Gamma2PI with respect to the self-coupling, and in a constant symmetry breaking background. The method is easily generalizable to field theories with arbitrary global symmetry.
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