Abstract
We perform a parameter scan of the phenomenological Minimal Supersymmetric Standard Model (pMSSM) with eight parameters taking into account the experimental Higgs boson results from Run I of the LHC and further low-energy observables. We investigate various MSSM interpretations of the Higgs signal at 125,, mathrm {GeV}. First, we consider the case where the light mathcal{CP}-even Higgs boson of the MSSM is identified with the discovered Higgs boson. In this case it can impersonate the SM Higgs-like signal either in the decoupling limit, or in the limit of alignment without decoupling. In the latter case, the other states in the Higgs sector can also be light, offering good prospects for upcoming LHC searches and for searches at future colliders. Second, we demonstrate that the heavy mathcal{CP}-even Higgs boson is still a viable candidate to explain the Higgs signal – albeit only in a highly constrained parameter region, that will be probed by LHC searches for the mathcal{CP}-odd Higgs boson and the charged Higgs boson in the near future. As a guidance for such searches we provide new benchmark scenarios that can be employed to maximize the sensitivity of the experimental analysis to this interpretation.
Highlights
The discovery of a Higgs-like scalar boson in Run I of the large hadron collider (LHC) [1,2] marks a milestone in the exploration of electroweak symmetry breaking (EWSB)
We perform a parameter scan of the phenomenological Minimal Supersymmetric Standard Model with eight parameters taking into account the experimental Higgs boson results from Run I of the LHC and further lowenergy observables
We demonstrate that the heavy CP-even Higgs boson is still a viable candidate to explain the Higgs signal – albeit only in a highly constrained parameter region, that will be probed by LHC searches for the CP-odd Higgs boson and the charged Higgs boson in the near future
Summary
The discovery of a Higgs-like scalar boson in Run I of the large hadron collider (LHC) [1,2] marks a milestone in the exploration of electroweak symmetry breaking (EWSB). A prime candidate for the observed scalar boson is a CPeven Higgs boson of the Minimal Supersymmetric Standard Model (MSSM) [4–6], as it possesses SM Higgs-like properties over a significant part of the model parameter space with only small deviations from the SM in the Higgs production and decay rates [7]. One of the main tasks of the LHC Run II will be to determine whether the observed scalar boson forms part of the Higgs sector of an extended model. The Higgs sector of the MSSM can be fully specified in terms of the W and Z boson masses, MW and MZ , the CP-odd Higgs boson mass, MA, and tan β ≡ vU /vD, the ratio of the two neutral Higgs vacuum expectation values.
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