Light signals from a lighter Higgs

With the Higgs search program already quite mature, there is the exciting possibility of discovering a new particle with rates near that of the SM Higgs. We consider models with a signal in gamma gamma below the SM Higgs mass. We discuss singlet models with additional vectorlike matter, but argue that a Type-I two Higgs doublet model can more easily provide detectable rates. In such scenarios, in regions of moderate-to-strong fermiophobia, the enhanced gamma gamma branching ratio allows signals from VH+VBF production to yield sigma x BR gamma gamma comparable to total SM rates and would thus be detectable. Light H production can be dominated via rare top decays t -> bH(+) -> bW*H, which provides an even more efficient means of production. We also consider this in the context of various Higgs anomalies, specifically the recent 2.9 sigma (local) CMS excess at 95 GeV, the LEP Higgs excess near the same mass, and excesses in tth searches at Tevatron and LHC. We find regions of parameter space that can meet all simultaneously. An implication of the Type-I scenario is that any gamma gamma excess should be associated with additional elements that could reduce background, including b-jets, forward jets or signs of vector boson production.