Higgs diphoton rate enhancement from supersymmetric physics beyond the MSSM

TL;DR

This paper demonstrates that supersymmetric physics beyond the MSSM can explain a 126 GeV Higgs and enhance the diphoton decay rate without conflicting with other Higgs measurements, using effective operators from a high-scale model.

Contribution

It introduces a mechanism where supersymmetric new physics beyond MSSM explains Higgs properties via effective operators generated at high scales.

Findings

Higgs mass near 126 GeV can be achieved with new supersymmetric physics.

Diphoton decay rate can be enhanced while other channels match Standard Model.

New physics scale can be around 5 TeV, beyond LHC reach.

Abstract

We show that supersymmetric "new physics" beyond the MSSM can naturally accommodate a Higgs mass near 126 GeV and enhance the signal rate in the Higgs to diphoton channel, while the signal rates in all the other Higgs decay channels coincide with Standard Model expectations, except possibly the Higgs to Z-photon 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.