Light sterile neutrinos, dark matter, and new resonances in a U(1) extension of the MSSM

A. Hebbar, G. Lazarides, and Q. Shafi
Phys. Rev. D 96, 055026 – Published 18 September 2017

Abstract

We present ψMSSM, 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 E6. The model predicts the existence of three sterile neutrinos with masses 0.1eV, if the U(1)ψ breaking scale is of order 10 TeV. Their contribution to the effective number of neutrinos at nucleosynthesis is ΔNν0.29. 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 103TeV, the sterile neutrinos, which are stable on account of a Z2 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. A U(1) R symmetry plays a key role in keeping the proton stable and providing the light sterile neutrinos.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Received 29 June 2017

DOI:https://doi.org/10.1103/PhysRevD.96.055026

© 2017 American Physical Society

Physics Subject Headings (PhySH)

  1. Research Areas
Particles & Fields

Authors & Affiliations

A. Hebbar1,*, G. Lazarides2,†, and Q. Shafi1,‡

  • 1Bartol Research Institute, Department of Physics and Astronomy, University of Delaware, Newark, Delaware 19716, USA
  • 2School of Electrical and Computer Engineering, Faculty of Engineering, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece

  • *aditmh@gmail.com
  • lazaride@eng.auth.gr
  • shafi@bartol.udel.edu

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 96, Iss. 5 — 1 September 2017

Reuse & Permissions
Access Options
CHORUS

Article Available via CHORUS

Download Accepted Manuscript
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review D

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×