Abstract
We analyse the impact of explicit CP-violation in the Higgs sector of the Next-to-Minimal Supersymmetric Standard Model (NMSSM) on its consistency with the Higgs boson data from the Large Hadron Collider (LHC). Through detailed scans of the parameter space of the complex NMSSM for certain fixed values of one of its CP-violating (CPV) phases, we obtain a large number of points corresponding to five phenomenologically relevant scenarios containing ∼125 GeV Higgs boson(s). We focus, in particular, on the scenarios where the visible peaks in the experimental samples can actually be explained by two nearly mass-degenerate neutral Higgs boson states. We find that some points corresponding to these scenarios give an overall slightly improved fit to the data, more so for nonzero values of the CPV phase, compared to the scenarios containing a single Higgs boson near 125 GeV.
Highlights
The Higgs sector of the Next-to-Minimal Supersymmetric Standard Model (NMSSM) [1,2,3,4] contains two additional neutral mass eigenstates besides the three of the Minimal Supersymmetric Standard Model (MSSM)
The Higgs sector of the NMSSM [1,2,3,4] contains two additional neutral mass eigenstates besides the three of the Minimal Supersymmetric Standard Model (MSSM). This is due to the presence of a Higgs singlet superfield besides the two doublet superfields of the MSSM
For a better theoretical precision, we evaluated the Higgs boson masses at the 2-loop level
Summary
The Higgs sector of the NMSSM [1,2,3,4] (see, e.g., [5, 6] for reviews) contains two additional neutral mass eigenstates besides the three of the Minimal Supersymmetric Standard Model (MSSM). This is due to the presence of a Higgs singlet superfield besides the two doublet superfields of the MSSM. In the NMSSM either of the two lightest CP-even Higgs bosons, H1 or H2, can play the role of the ∼125 GeV Standard Model- (SM-) like Higgs boson, Hobs, observed at the LHC [7,8,9]
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