Higgs diphoton decay rate enhancement in the Triplet-extended Minimal Supersymmetric Standard Model

Abstract

The Higgs sector of the standard model remains an active probe for new high energy models. In addition to the hierarchy problem concerning the Higgs mass, LHC measurements for Higgs decay rate in the Diphoton channel are in excess when compared to standard model predictions. A non-minimal supersymmetric extension of the standard model using a Y=0 triplet has been shown to alleviate the hierarchy problem and provide the enhancements to the Higgs diphoton decay rate with the addition of a chargino loop contribution. Numerical scans in the model's parameter space show mild constraints that result in the expected signal strengths for the decay channel. The inclusion of constraints from Dark Matter relic density and Spin-Independent proton cross-section measurements lead to a suppression of the expected signal strength and indicate stable predictions for future detector measurements of the decay rate.