On the consistent solution of the gap--equation for spontaneously broken $λΦ^4$-theory

Details On the consistent solution of the gap--equation for spontaneously broken $λΦ^4$-theory On the consistent solution of the gap--equation for spontaneously broken $λΦ^4$-theory

1994-10-07

arxiv.org/abs/hep-ph/9410247v1

Z.Phys. C67 (1995) 641-646

Physics

High Energy Physics

High Energy Physics - Phenomenology

15 pages of revtex + 3 uuencoded postscript figures, ENSLAPP A-488/94

Scientific paper

10.1007/BF01553991

We present a self--consistent solution of the finite temperature gap--equation for $\lambda \Phi^4$ theory beyond the Hartree-Fock approximation using a composite operator effective action. We find that in a spontaneously broken theory not only the so--called daisy and superdaisy graphs contribute to the resummed mass, but also resummed non--local diagrams are of the same order, thus altering the effective mass for small values of the latter.

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