Regular Article - Theoretical Physics
Sterile neutrinos in string derived models
Department of Mathematical Sciences, University of Liverpool, Liverpool, L69 7ZL, UK
* e-mail: email@example.com
Accepted: 14 October 2018
Published online: 27 October 2018
The MiniBooNE collaboration recently reported further evidence for the existence of sterile neutrinos, implying substantial mixing with the left-handed active neutrinos and at a comparable mass scale. I argue that while sterile neutrinos may arise naturally in large volume string models, they prove more of a challenge in heterotic-string models that replicate the Grand Unified Theory structure of the Standard Model matter states. Sterile neutrinos in heterotic-string models may imply the existence of an additional Abelian gauge symmetry of order 10–100 TeV.
© The Author(s), 2018