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The frequently discussed strongly interacting gauge theory with a fermionflavor doublet in the two-index symmetric (sextet) representation of the SU(3)color gauge group is investigated \cite{Fodor:2012ty}. The chiral condensateand the mass spectrum are consistent with chiral symmetry breaking at vanishingfermion mass. In contrast, sextet fermion mass deformations of spectralproperties are not consistent with leading conformal scaling behavior near thecritical surface of a conformal theory. A recent paper \cite{DeGrand:2012yq}which could not resolve the conformal fixed point of the gauge coupling fromthe slowly walking scenario of a very small nearly vanishing \beta -function isnot in conflict with chiral symmetry breaking reported here. A light Higgsimpostor could emerge as the dilaton from spontaneous symmetry breaking ofscale invariance or, without the dilaton mechanism, as a composite state.

The sextet gauge model, light Higgs, and the dilaton