Counterterm resummation for 2PI-approximation in constant background

Details Counterterm resummation for 2PI-approximation in constant background Counterterm resummation for 2PI-approximation in constant background

2008-06-16

arxiv.org/abs/0806.2554v3

Nucl.Phys.A811:329-352,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

23 pages, 2 figures, typos corrected. Version published in Nucl. Phys. A

Scientific paper

10.1016/j.nuclphysa.2008.08.001

Explicit counterterm construction is presented in a symmetry breaking background for the 2PI effective action of the self-interacting one-component scalar field including skeleton diagrams to O(\lambda^2). The applied strategy is an extension of our treatment of the 2PI-Hartree approximation [G. Fejos, A. Patkos and Zs. Szep, Nucl. Phys. A803 (2008) 135]. The procedure is also applied to the O(N) model.

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