A Not So Little Higgs?

Abstract

Most recent models assuming the Higgs Boson is a pseudo-Nambu-Goldstone Boson (p NGb) are motivated by the indication from Standard Model fits that its mass is < 200GeV.Starting from a modified SM of Forshaw et. al. with a triplet boson added and a heavier Higgs Boson, we consider a pNGb model. This differs in several wa ys from most little Higgs models: apart from using only one loop, the cutoff sca le is reduced to 5 TeV, and consequently a linear sigma model is used to allevia te FCNC effects; no new vector bosons are required, but vector-like isosinglet f ermions are needed, but play no part in determining the mass of the Higgs Boson. The phenomenology of the isosinglet pNGb that arises from the SU(3)xSU(3)->SU(3) model we use is briefly discussed. Some potential theoretical and phenomenolog ical problems arementioned briefly.