How Magnetic is the Dirac Neutrino?
High Energy Physics - Phenomenology
2009-11-11 v4
Abstract
We derive model-independent, "naturalness" upper bounds on the magnetic moments \mu_\nu 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 |\mu_\nu | < 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.
Keywords
Cite
@article{arxiv.hep-ph/0504134,
title = {How Magnetic is the Dirac Neutrino?},
author = {Nicole F. Bell and Vincenzo Cirigliano and Michael J. Ramsey-Musolf and Petr Vogel and Mark B. Wise},
journal= {arXiv preprint arXiv:hep-ph/0504134},
year = {2009}
}
Comments
4 pages, 3 figures, Majorana case discussion corrected. References updated; replaced to match published version