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Published October 7, 2005 | Published
Journal Article Open

How Magnetic is the Dirac Neutrino?


We derive model-independent, "naturalness" upper bounds on the magnetic moments µnu of Dirac neutrinos generated by physics above the scale of electroweak symmetry breaking. In the absence of fine-tuning of effective operator coefficients, we find that current information on neutrino mass implies that |µnu|<~10-14 bohr magnetons. This bound is several orders of magnitude stronger than those obtained from analyses of solar and reactor neutrino data and astrophysical observations.

Additional Information

© 2005 The American Physical Society (Received 26 April 2005; published 4 October 2005) This work was supported in part under U.S. DOE Contracts No. DE-FG02-05ER41361 and No. DE-FG03-92ER40701, and NSF Grant No. PHY-0071856.

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