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Neutrino nonstandard interactions as a portal to test flavor symmetries

Wang, TseChun; Zhou, Ye-Ling

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TseChun Wang

Ye-Ling Zhou


Imposing non-Abelian discrete flavor symmetries on neutrino nonstandard interactions (NSIs) is discussed for the first time. For definiteness, we choose A4 as the flavor symmetry, which is subsequently broken to the residual symmetry Z2 in the neutrino sector. We provide a general discussion on the flavor structures of NSIs from higher-dimensional operators (d ≤ 8) without inducing unnecessary tree-level fourcharged-fermion interactions. Both A4- and Z2-motivated NSI textures are obtained. UV completions of higher-dimensional operators lead to extra experimental constraints on NSI textures. We study the implementation of matter-effect NSIs in DUNE from a phenomenological point of view, and discover that DUNE can test A4 with a high level of statistics. We also present the exclusion limits of sum rules suggested by UV-complete models. Our results show that the NSI effects, though predicted to be small for DUNE, could provide useful information that might extend our understanding of the flavor symmetry.


Wang, T., & Zhou, Y. (2019). Neutrino nonstandard interactions as a portal to test flavor symmetries. Physical Review D, 99(3), Article 035039.

Journal Article Type Article
Online Publication Date Feb 26, 2019
Publication Date Feb 28, 2019
Deposit Date Mar 20, 2019
Publicly Available Date Mar 20, 2019
Journal Physical Review D
Print ISSN 2470-0010
Electronic ISSN 2470-0029
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 99
Issue 3
Article Number 035039


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Copyright Statement
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.

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