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Massive renormalization scheme and perturbation theory at finite temperature

By Jean-Paul Blaizot and Nicolás Wschebor

Abstract

International audienceWe argue that the choice of an appropriate, massive, renormalization scheme can greatly improve the apparent convergence of perturbation theory at finite temperature. This is illustrated by the calculation of the pressure of a scalar field theory with quartic interactions, at 2-loop order. The result, almost identical to that obtained with more sophisticated resummation techniques, shows a remarkable stability as the coupling constant grows, in sharp contrast with standard perturbation theory

Topics: [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph]
Publisher: 'Elsevier BV'
Year: 2015
DOI identifier: 10.1016/j.physletb.2014.12.040
OAI identifier: oai:HAL:cea-01197313v1
Provided by: HAL-CEA
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