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Published July 11, 2006 | Published
Book Section - Chapter Open

Magnetic Moments of Dirac Neutrinos


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 neutrinos, generated by physics above the electroweak scale. The neutrino mass receives a contribution from higher order operators, which are renormalized by operators responsible for the neutrino magnetic moment. This contribution can be calculated in a model independent way. In the absence of fine-tuning, we find that current neutrino mass limits imply that µv < 10^–14 Bohr magnetons. This bound is several orders of magnitude stronger than those obtained from solar and reactor neutrino data and astrophysical observations.

Additional Information

© 2006 American Institute of Physics. This work was supported in part under U.S. DOE contracts DE-FG02-05ER41361 and DE-FG03-92ER40701, and NSF grant PHY-0071856.

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