Status of low energy SUSY models confronted with the LHC 125 GeV Higgs data

TL;DR

This paper evaluates various low energy SUSY models against recent LHC Higgs data, dark matter constraints, and B_s decay measurements, finding the NMSSM most compatible with observations, while others face challenges or exclusions.

Contribution

It updates the parameter space analysis of low energy SUSY models with latest experimental data and compares their predictions with Higgs search results, highlighting the NMSSM's favorable status.

Findings

NMSSM naturally agrees with Higgs data at 1-sigma

MSSM fits data but with some fine tuning

nMSSM is excluded at 3-sigma

Abstract

Confronted with the LHC data of a Higgs boson around 125 GeV, different models of low energy SUSY show different behaviors: some are favored, some are marginally survived and some are strongly disfavored or excluded. In this note we update our previous scan over the parameter space of various low energy SUSY models by considering the latest experimental limits like the LHCb data for B_s->\mu^+\mu^- and the XENON 100(2012) data for dark matter-neucleon scattering. Then we confront the predicted properties of the SM-like Higgs boson in each model with the combined 7 TeV and 8 TeV Higgs search data of the LHC. For a SM-like Higgs boson around 125 GeV, we have the following observations: (i) The most favored model is the NMSSM, whose predictions about the Higgs boson can naturally (without any fine tuning) agree with the experimental data at 1-sigma level, better than the SM; (ii) The MSSM can fit the LHC data quite well but suffer from some extent of fine tuning; (iii) The nMSSM is excluded at 3-sigma level after considering all the available Higgs data; (iv) The CMSSM is quite disfavored since it is hard to give a 125 GeV Higgs boson mass and at the same time cannot enhance the di-photon signal rate.