Triviality" and the Perturbative Expansion in $λΦ^4$ Theory

Details Triviality" and the Perturbative Expansion in $λΦ^4$ Theory Triviality" and the Perturbative Expansion in $λΦ^4$ Theory

1994-03-16

arxiv.org/abs/hep-ph/9403299v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, LaTeX, no figures, DE-FG05-92ER40717-13, MAD/TH/94-4

Scientific paper

The "triviality" of $(\lambda\Phi^4)_4$ quantum field theory means that the renormalized coupling $\lambda_R$ vanishes for infinite cutoff. That result inherently conflicts with the usual perturbative approach, which begins by postulating a non-zero, cutoff-independent $\lambda_R$. We show how a "trivial" solution $\lambda_R=0$ can be compatible with the known structure of perturbation theory to arbitrarily high orders, by a simple re-arrangement of the expansion. The "trivial" solution reproduces the result obtained by non-perturbative renormalization of the effective potential. The physical mass is finite, while the renormalized coupling strength vanishes: the two are NOT proportional. The classically scale-invariant $\lambda \Phi^4$ theory coupled to the Standard Model predicts a 2.2 TeV Higgs, but does NOT imply strong interactions in the scalar sector.

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