Jiwei Ke, Ming-Xing Luo, Lian-You Shan, Kai Wang, Liucheng Wang
Motivated by the observed excess of the di-photon signal in Higgs searches, $\sigma_{\gamma\gamma}/\sigma_{\rm SM}\simeq 1.5$, we argue that models with enhanced $\Gamma(h\to \gamma\gamma)$ alone is the most favorable scenario when the latest LHC/Tevatron results are all taken into account. To illustrate this feature, we discuss a scenario within the supersymmetry framework with a light stau that predicts a 125 GeV SM-like Higgs boson. The scenario is consistent with all known constraints, including dark matter production and $B_{s}\to \mu^{+}\mu^{-}$. We focus on the production of stau pairs through $b\bar{b}$ fusion or gauging pairs. These can significantly enhance the inclusive stau pair rate in comparison with the Drell-Yan process. In our studies, we follow the approach of using hadronic tau-tagging. Taking the most optimistic benchmark point of $M_{A}=600$ GeV and $M_{2}=125$ GeV, we find it is possible to reach 5 $\sigma$ significance for integrated luminosity of 10 fb$^{-1}$ at 8 TeV. While for $\sigma(\tilde{\tau}^{+}_{1}\tilde{\tau}^{-}_{1}+X)=1$ pb at 14 TeV running, it requires at least 100 fb$^{-1}$ to reach about 3.5 $\sigma$ significance.
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http://arxiv.org/abs/1207.0990
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