Testing lepton flavor models at ESSnuSB

Publisher's version (útgefin grein) We review and investigate lepton flavor models, stemming from discrete non- Abelian flavor symmetries, described by one or two free model parameters. First, we confront eleven one- and seven two-parameter models with current results on leptonic mixing angles...

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Bibliographic Details
Published in:Journal of High Energy Physics
Main Authors: Blennow, Mattias, Ghosh, Monojit, Ohlsson, Tommy, Titov, Arsenii
Other Authors: Raunvísindastofnun (HÍ), Science Institute (UI), Verkfræði- og náttúruvísindasvið (HÍ), School of Engineering and Natural Sciences (UI), Háskóli Íslands, University of Iceland
Format: Article in Journal/Newspaper
Language:English
Published: Springer Science and Business Media LLC 2020
Subjects:
Beyond Standard Model
CP violation
Discrete Symmetries
Neutrino Physics
Laure
Marcos
Iceland
Online Access:https://hdl.handle.net/20.500.11815/2288
https://doi.org/10.1007/JHEP07(2020)014
Description
Summary:Publisher's version (útgefin grein) We review and investigate lepton flavor models, stemming from discrete non- Abelian flavor symmetries, described by one or two free model parameters. First, we confront eleven one- and seven two-parameter models with current results on leptonic mixing angles from global fits to neutrino oscillation data. We find that five of the one- and five of the two-parameter models survive the confrontation test at 3σ. Second, we investigate how these ten one- and two-parameter lepton flavor models may be discriminated at the proposed ESSnuSB experiment in Sweden. We show that the three one-parameter models that predict sin δCP = 0 can be distinguished from those two that predict | sin δCP| = 1 by at least 7σ. Finally, we find that three of the five one-parameter models can be excluded by at least 5σ and two of the one-parameter as well as at most two of the five two-parameter models can be excluded by at least 3σ with ESSnuSB if the true values of the leptonic mixing parameters remain close to the present best-fit values. We would like to thank Marcos Dracos, Tord Ekel of, and Marcus Pernow for useful dis-cussions. We would also like to thank Marie-Laure Schneider for comments on our work.This project is supported by the COST Action CA15139\Combining forces for a novel Eu-ropean facility for neutrino-antineutrino symmetry-violation discovery"(EuroNuNet). Ithas also received funding from the European Union's Horizon 2020 research and innovationprogramme under grant agreement No 777419. T.O. acknowledges support by the SwedishResearch Council (Vetenskapsr adet) through Contract No. 2017-03934 and the KTH RoyalInstitute of Technology for a sabbatical period at the University of Iceland. Peer Reviewed

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