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Supersymmetric Higgs

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Beyond Standard Model Collider Phenomenology of Higgs Physics and Supersymmetry

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Abstract

In this chapter, the effects from light sfermions on the lightest Higgs boson production and decay at the Large Hadron Collider (LHC) within the Minimal Supersymmetric Standard Model (MSSM) is studied. It is found that the scenario with light coloured sfermions (stops or sbottoms) has the potential to explain a non-universal alteration, as hinted by LHC data, of the gluon–gluon Fusion (\(\mu _{ggF}\)) with respect to the Vector Boson Fusion (VBF) event rates and, in particular, can predict \(\mu _{VBF}/\mu _{ggF} > 1\) for all Higgs boson decay channels in large areas of the parameter space. The scenario with a light stop is emphasised, as the latter is also motivated by Dark Matter and Electro-Weak baryogenesis, although we also explore scenarios with light sbottoms and/or staus as well as a SUSY induced reduced bottom Yukawa. Fits of the MSSM against the LHC data is performed, emphasising the fact that in most cases these are better than for the SM.

The original version of this chapter was revised: For detailed information please see Erratum. The erratum to this chapter is available at 10.1007/978-3-319-43452-0_7.

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Notes

  1. 1.

    Sensitivity to the \(h\rightarrow Z\gamma \) mode is much less in comparison, though some limits already exist. Similarly, for Higgs boson invisible decays [5].

  2. 2.

    We should also mention that, initially, both collaborations had initially observed a generic enhancement in the \(h\rightarrow \gamma \gamma \) channel, however CMS results have since shifted down and even below the SM value.

  3. 3.

    We have deliberately used so far the symbol h to signify both the SM Higgs state and the lightest MSSM CP-even one, as our MSSM solutions to the Higgs data will only involve the latter amongst the possible neutral Higgs states.

  4. 4.

    Recall, in fact, that the dominant component of the Higgs boson width for masses of order 125 GeV is typically the partial width in \(b\bar{b}\) pairs.

  5. 5.

    The maximum value of \(m_h\) displayed in Fig. 4.3b occurs for \(X_t/M_\mathrm{SUSY}\) slightly smaller than \(\sqrt{6}\) as it is calculated at two loops, where the maximal mixing value is slightly smaller and closer to 2.

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  1. Department of Physics and Astronomy, University of Southampton, Southampton, UK

    Marc Christopher Thomas

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Thomas, M.C. (2016). Supersymmetric Higgs. In: Beyond Standard Model Collider Phenomenology of Higgs Physics and Supersymmetry. Springer Theses. Springer, Cham. https://doi.org/10.1007/978-3-319-43452-0_4

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