Neutrino charge constraints from scattering to the weak gravity conjecture to neutron stars

Abstract

In various extensions of the Standard Model of particle physics, and intriguingly even in the three-generation Standard Model without neutrino masses, neutrinos are allowed to have very tiny electric charges. After a review of the theoretical scenarios that allow the emergence of such charges, we discuss the existing observational limits and we derive new stringent direct upper bounds for the charges of the muon and tau neutrinos. We also point out a flavor-universal lower bound on neutrino charges which is obtained from the weak gravity conjecture, that is based on the hypothesis that gravity is the weakest force. We finally present a new flavor-universal upper bound on neutrino charges based on astrophysical observations of Magnetars.

9 pages. Changes in exposition and additional details. Published version

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• The strongest cosmic magnets: Soft Gamma-ray Repeaters and Anomalous X-ray Pulsars
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Cited by in corpus (5)

• Impact of the Dresden-II and COHERENT neutrino scattering data on neutrino electromagnetic properties and electroweak physics
• Neutrino Electromagnetic Properties
• Neutrino Electromagnetic Properties and the Weak Mixing Angle at the LHC Forward Physics Facility
• Hitchhiker's Guide to the Swampland: The Cosmologist's Handbook to the string-theoretical Swampland Programme
• Constraining neutrino electromagnetic properties with recent low-energy electron recoil data at dark matter direct detection experiments