Neutrinos and Non-Invertible Symmetry

Nov 15, 2022, 11:30 AM
The Grand Sumorum, Jeju

The Grand Sumorum, Jeju

114, Maksukpo-ro, Seogwipo-si, Jeju Special Self-Governing Province (1513, Beophwan-dong)


Sungwoo Hong (KAIST)


The notion of symmetries has been generalized rather drastically in
recent years. These generalized global symmetries have shown to be extremely
powerful in deepening our understanding of QFT. The appearance and usage of
generalized global symmetries in particle physics are yet to be explored and this
talk will provide one such story. In this talk, I will show that the SM supplemented
with an extra unbroken U(1) gauge group can possess an non-invertible global
symmetry and this new symmetry can protect the neutrino mass operator from
being generated. An exponentially small neutrino mass can then be induced by a
non-perturbative violation of non-invertible symmetry by UV monopoles. I will
discuss two theories, one of which has Dirac neutrino masses, and the other
Majorana masses. If time permits, TeV-scale phenomenology will be discussed.

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