REDUCTION OF THE N-COMPONENT SCALAR MODEL AT TWO LOOP LEVEL

Details REDUCTION OF THE N-COMPONENT SCALAR MODEL AT TWO LOOP LEVEL REDUCTION OF THE N-COMPONENT SCALAR MODEL AT TWO LOOP LEVEL

1995-02-16

arxiv.org/abs/hep-ph/9502313v1

Phys.Rev. D53 (1996) 4538-4551

Physics

High Energy Physics

High Energy Physics - Phenomenology

16 pages, revtex v3.0

Scientific paper

10.1103/PhysRevD.53.4538

Dimensional reduction of high temperature field theories improves IR features of their perturbative treatment. A crucial question is, what three-dimensional theory is representing the full system the most faithful way. Careful investigation of the induced 3-dimensional counterterm structure of the finite temperature 4D O(N) symmetric scalar theory at 2-loop level leads to proposing the presence of non-local operators in the effective theory. On scales beyond ${\cal O}(T^{-1})$, the scaling behavior of the couplings, consequently, deviates from the usual three-dimensional scaling characteristic for superrenormalizable theories.

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