Light sterile neutrinos, dark matter, and new resonances in a U ( 1 ) extension of the MSSM
- University of Delaware, Newark, DE (United States)
- Aristotle University of Thessaloniki (Greece)
We present $$ψ$$'MSSM, a model based on a $U(1)$$$ψ$$' extension of the minimal supersymmetric standard model. The gauge symmetry $U(1)$$$ψ$$', also known as $U(1)$$$N$$, is a linear combination of the $U(1)$$$χ$$ and $U(1)$$$ψ$$ subgroups of $$E$$6. The model predicts the existence of three sterile neutrinos with masses ≲ 0.1 eV, if the $U(1)$$$ψ$$' breaking scale is of order 10 TeV. Their contribution to the effective number of neutrinos at nucleosynthesis is $ΔN$$$ν$$ ≃ 0.29. The model can provide a variety of possible cold dark matter candidates including the lightest sterile sneutrino. If the $U(1)$$$ψ$$' breaking scale is increased to 103 TeV, the sterile neutrinos, which are stable on account of a $$Z$$2 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 $U(1)$$$ψ$$'. The model predicts diquark and diphoton resonances which may be found at an updated LHC. The well-known $$µ$$ problem is resolved, and the observed baryon asymmetry of the universe can be generated via leptogenesis. The breaking of $U(1)$$ψ'$ produces superconducting strings that may be present in our galaxy. In conclusion, a $U(1)$ R symmetry plays a key role in keeping the proton stable and providing the light sterile neutrinos.
- Research Organization:
- Univ. of Delaware, Newark, DE (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Grant/Contract Number:
- SC0013880
- OSTI ID:
- 1536380
- Alternate ID(s):
- OSTI ID: 1392156
- Report Number(s):
- UT-STPD-17/01
- Journal Information:
- Physical Review. D., Vol. 96, Issue 5; ISSN 2470-0010
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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