How Magnetic is the Neutrino?

Abstract

The existence of a neutrino magnetic moment implies contributions to the neutrino mass via radiative corrections. We derive model-independent "naturalness" upper bounds on the magnetic moments of Dirac and Majorana neutrinos, generated by physics above the electroweak scale. For Dirac neutrinos, the bound is several orders of magnitude more stringent than present experimental limits. However, for Majorana neutrinos the magnetic moment bounds are weaker than present experimental limits if ${\mu }_{\nu }$ is generated by new physics at ~ 1 TeV, and surpass current experimental sensitivity only for new physics scales > 10 -- 100 TeV. The discovery of a neutrino magnetic moment near present limits would thus signify that neutrinos are Majorana particles.

9 pages, 6 figures. Talk given at Festschrift in honour of B. H. J McKellar and G. C. Joshi

References in corpus (3)

• How Magnetic is the Dirac Neutrino?
• Model Independent Bounds on Magnetic Moments of Majorana Neutrinos
• From transition magnetic moments to majorana neutrino masses

Cited by in corpus (7)

• Magnetic Moment Generation from non-minimal couplings in a scenario with Lorentz-Symmetry Violation
• Neutrino magnetic moment: a window to new physics
• Neutrino transition magnetic moments within the non-standard neutrino-nucleus interactions
• Neutrino spin oscillations in polarized matter
• Geometric phase for neutrino propagation in magnetic field
• Transition Radiation from the Neutrino-Photon Interaction in Matter
• A QFT-induced phase in neutrino flavour oscillations