Bounds on the Higgs-boson mass in the presence of nonstandard interactions

The triviality and vacuum stability bounds on the Higgs-boson mass are derived in the presence of weakly coupled new interactions parametrized in a model-independent way by an effective Lagrangian. When the scale of new physics Lambda is below 50 TeV the triviality bound is unchanged but the stability lower bound is increased by 40-60 GeV if the effective Lagrangian parameters are O(1) at the scale Lambda. In this case a Higgs-boson mass close to its current lower experimental limit would indicate the presence of new physics at the scale of a few TeV.