Can a light Higgs impostor hide in composite gauge models?

Abstract

The frequently discussed strongly interacting gauge theory with a fermion flavor doublet in the two-index symmetric (sextet) representation of the SU(3) color gauge group is investigated. In previous studies the chiral condensate and the mass spectrum were shown to be consistent with chiral symmetry breaking ($χ$SB) at vanishing fermion mass. The recently reported $β$-function is not inconsistent with this observation, suggesting that the model is very close to the conformal window and a light "Higgs impostor" could emerge as a composite state. In this work we describe the methodology and preliminary results of studying the emergence of the light composite scalar with $0^{++}$ quantum numbers.

7 pages, Proceedings of the 31st International Symposium on Lattice Field Theory - LATTICE 2013 062