Understand
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.
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