Abstract
We present MSSM, a model based on a extension of the minimal supersymmetric standard model. The gauge symmetry , also known as , is a linear combination of the and subgroups of . The model predicts the existence of three sterile neutrinos with masses , if the breaking scale is of order 10 TeV. Their contribution to the effective number of neutrinos at nucleosynthesis is . The model can provide a variety of possible cold dark matter candidates including the lightest sterile sneutrino. If the breaking scale is increased to , the sterile neutrinos, which are stable on account of a symmetry, become viable warm dark matter candidates. The observed value of the standard model Higgs boson mass can be obtained with relatively light stop quarks thanks to the D-term contribution from . The model predicts diquark and diphoton resonances which may be found at an updated LHC. The well-known problem is resolved and the observed baryon asymmetry of the universe can be generated via leptogenesis. The breaking of produces superconducting strings that may be present in our galaxy. A R symmetry plays a key role in keeping the proton stable and providing the light sterile neutrinos.
- Received 29 June 2017
DOI:https://doi.org/10.1103/PhysRevD.96.055026
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