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Model Independent Bounds on Magnetic Moments of Majorana Neutrinos

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arxiv hep-ph/0606248 v2 pith:C6JRXB6R submitted 2006-06-22 hep-ph

Nicole F. Bell , Mikhail Gorchtein , Michael J. Ramsey-Musolf , Petr Vogel , Peng Wang This is my paper
classification hep-ph
keywords magneticneutrinoneutrinosmajoranamomentsboundsexperimentallimits
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abstract

We analyze the implications of neutrino masses for the magnitude of neutrino magnetic moments. By considering electroweak radiative corrections to the neutrino mass, we derive model-independent naturalness upper bounds on neutrino magnetic moments, $\mu_\nu$, 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 contribution to the mass is Yukawa suppressed. The bounds we derive for magnetic moments of Majorana neutrinos 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.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Decoupling Neutrino Magnetic Moment from Mass with $SU(2)_L$ Invariance

    hep-ph 2025-06 reject novelty 7.0 of 10

    A loop-level neutrino magnetic moment is generated via an SU(2)_L adjoint fermion 'bridge', making the mass diagram vanish by tracelessness of the generators, though RG mixing limits the observable size.

  2. New constraints on physics within and beyond the standard model from the latest CONUS datasets

    hep-ex 2026-05 conditional novelty 4.0 of 10

    New reactor antineutrino data from CONUS germanium detectors improve upper limits on neutrino magnetic moment to 5.18e-11 mu_B, millicharge to 1.76e-12 e0, NSI scale to 145 GeV, and yield sin^2 theta_W = 0.28 +0.03/-0...

  3. Weak Triplet Models of Neutrino Magnetic Moments

    hep-ph 2026-05 unverdicted novelty 3.0 of 10

    Weak triplet models permit decoupling of neutrino magnetic moment from mass in minimal realizations but require delicate parameter adjustments for observable effects, and lose the decoupling in extended scenarios.

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