PoS - Proceedings of Science
Volume 405 - 7th Symposium on Prospects in the Physics of Discrete Symmetries, DISCRETE 2020-2021 (DISCRETE2020-2021) - Parallel sessions Monday
Horizontal Symmetry and Large Neutrino Magnetic Moments
S. Jana
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Pre-published on: June 12, 2022
Published on: October 05, 2022
We investigate new symmetries which decouple the mass from the magnetic moment of neutrinos and their theoretical and phenomenological implications are discussed. Our proposed model is based on $SU(2)_H$ horizontal symmetry that can generate large neutrino transition magnetic moment without inducing unacceptably large neutrino masses. In the $SU(2)_H$ symmetric limit, the transition magnetic moment is nonzero, while the neutrino mass vanishes. The simplification we suggest is based on the symmetry being approximate, which we also generalize to a three-family $SU(3)_H$-symmetry. We have also investigated a spin symmetry mechanism that can generate large $\mu_\nu$ while keeping $m_\nu$ small. This talk is based on results obtained with K.S. Babu, and Manfred Lindner and presented in hep-ph 2007.04291~\cite{Babu:2020ivd}.
DOI: https://doi.org/10.22323/1.405.0037
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