A SM-like Higgs near 125 GeV in low energy SUSY: a comparative study for MSSM and NMSSM

By Junjie Cao, Zhaoxia Heng, Jin Min Yang, Yanming Zhang, Jing-yu Zhu. 2012

373 citations recorded by the source corpus.

A bstractMotivated by the recent LHC hints of a Higgs boson around 125 GeV, we assume a SM-like Higgs with the mass 123-127 GeV and study its implication in low energy SUSY by comparing the MSSM and NMSSM. We consider various experimental constraints at 2σ level (including the muon g − 2 and the dark matter relic density) and perform a comprehensive scan over the parameter space of each model. Then in the parameter space which is allowed by current experimental constraints and also predicts a SM-like Higgs in 123-127 GeV, we examine the properties of the sensitive parameters (like the top squark mass and the trilinear coupling At) and calculate the rates of the di-photon signal and the V V* (V = W, Z) signals at the LHC. Our typical findings are: (i) In the MSSM the top squark and At must be large and thus incur some fine-tuning, which can be much ameliorated in the NMSSM; (ii) In the MSSM a light stau is needed to enhance the di- photon rate of the SM-like Higgs to exceed its SM prediction, while in the NMSSM the di-photon rate can be readily enhanced in several ways; (iii) In the MSSM the signal rates of pp → h → V V* at the LHC are never enhanced compared with their SM predictions, while in the NMSSM they may get enhanced significantly; (iv) A large part of the parameter space so far survived will be soon covered by the expected XENON100(2012) sensitivity (especially for the NMSSM).

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/8ab2a4a3ef4ebd305d9ce10ad0bf1972242bc2af

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Citations in the corpus

Reconstructing Higgs boson properties from the LHC and Tevatron data (2012, methodology): “Supersymmetric theories that attempt to solve the naturalness problem of the electroweak scale have been stringently constrained by the LHC direct searches as well as by the Higgs boson results [58, 83–113].”
Naturalness and the Status of Supersymmetry (2013, background): “6: Values of top squark parameters that give 123 GeV < mh < 127 GeV in viable MSSM models [69].”
Handbook of LHC Higgs Cross Sections: 3. Higgs Properties (2013, background): “– The light stau scenario: It has been shown that light staus, in the presence of large mixing, may lead to important modifications of the di-photon decay width of the lightest CP-even Higgs boson, Γ(h → γγ) [321, 334, 338,365,661,662,678,679].”