Higgs diphoton rate enhancement from supersymmetric physics beyond the MSSM

Abstract

We show that supersymmetric ``new physics'' beyond the minimal supersymmetric standard model can naturally accommodate a Higgs mass near 126 GeV and enhance the signal rate in the $h\ensuremath{\rightarrow}\ensuremath{\gamma}\ensuremath{\gamma}$ channel, while the signal rates in all the other Higgs decay channels coincide with Standard Model expectations, except possibly the $h\ensuremath{\rightarrow}Z\ensuremath{\gamma}$ channel. The new physics that corrects the relevant Higgs couplings can be captured by two supersymmetric effective operators. We provide a simple example of an underlying model in which these operators are simultaneously generated. The scale of new physics that generates these operators can be around 5 TeV or larger, and outside the reach of the LHC.