Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2011-03-03
Phys.Lett.B703:462-468,2011
Physics
High Energy Physics
High Energy Physics - Phenomenology
Version in PLB (discussions added)
Scientific paper
10.1016/j.physletb.2011.08.024
As the most important discovery channel for a light Higgs boson at the LHC, the di-photon signal $gg->h->\gamma\gamma$ is sensitive to underlying physics. In this work we investigate such a signal in a comparative way by considering three different supersymmetric models, namely the minimal supersymmetric standard model (MSSM), the next-to-minimal supersymmetric standard model (NMSSM) and the nearly minimal supersymmetric standard model (nMSSM). Under the current collider and cosmological constraints we scan over the parameter space and obtain the following observation in the allowed parameter space: (i) In the nMSSM the signal rate is always suppressed; (ii) In the MSSM the signal rate is suppressed in most cases, but in a tiny corner of the parameter space it can be enhanced (maximally by a factor of 2); (iii) In the NMSSM the signal rate can be enhanced or suppressed depending on the parameter space, and the enhancement factor can be as large as 7.
Cao Junjie
Heng Zhaoxia
Liu Tao
Yang Jin Min
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