Triviality and stability in effective theories

Abstract

In this talk we consider the modifications induced by heavy physics on the triviality and vacuum stability bounds on the Higgs-boson mass. We parameterize the heavy interactions using an effective Lagrangian and find that the triviality bound is essentially unaffected for weakly-coupled heavy physics. In contrast there are significant modifications in the stability bound that for a light Higgs boson require a scale of new physics of the order of a few TeV.

Comments: Talk presented at the HEP2001 conference 5 pages, 3 figures. Requires JHEP3.cls (available at http://jhep.sissa.it/JOURNAL/tex.html)