title: How Magnetic is the Dirac Neutrino?
abstract: We derive model-independent, "naturalness" upper bounds on the magnetic moments munu 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[EQUATION: SEE TEXT] bohr magnetons. This bound is several orders of magnitude stronger than those obtained from analyses of solar and reactor neutrino data and astrophysical observations.
authors.affiliation: California Institute of Technology, Pasadena, California 91125, USA.
authors.forename: Nicole F
authors.initials: NF
authors.lastname: Bell
authors.forename: V
authors.initials: V
authors.lastname: Cirigliano
authors.forename: M J
authors.initials: MJ
authors.lastname: Ramsey-Musolf
authors.forename: P
authors.initials: P
authors.lastname: Vogel
authors.forename: Mark B
authors.initials: MB
authors.lastname: Wise