Testing lepton flavor models at ESSnuSB

Journal of High Energy Physics

Mattias Blennow¹  Monojit Ghosh²  Tommy Ohlsson³  Arsenii Titov⁴ 

[1] Department of Physics, School of Engineering Sciences, KTH Royal Institute of Technology, AlbaNova University Center, Roslagstullsbacken 21, SE-106 91, Stockholm, Sweden;Departamento de Física Teórica and Instituto de Física Teórica, IFT-UAM/CSIC, Universidad Autónoma de Madrid, Cantoblanco, 28049, Madrid, Spain;The Oskar Klein Centre for Cosmoparticle Physics, AlbaNova University Center, Roslagstullsbacken 21, SE-106 91, Stockholm, Sweden;Department of Physics, School of Engineering Sciences, KTH Royal Institute of Technology, AlbaNova University Center, Roslagstullsbacken 21, SE-106 91, Stockholm, Sweden;The Oskar Klein Centre for Cosmoparticle Physics, AlbaNova University Center, Roslagstullsbacken 21, SE-106 91, Stockholm, Sweden;Department of Physics, School of Engineering Sciences, KTH Royal Institute of Technology, AlbaNova University Center, Roslagstullsbacken 21, SE-106 91, Stockholm, Sweden;The Oskar Klein Centre for Cosmoparticle Physics, AlbaNova University Center, Roslagstullsbacken 21, SE-106 91, Stockholm, Sweden;University of Iceland, Science Institute, Dunhaga 3, IS-107, Reykjavik, Iceland;Dipartimento di Fisica e Astronomia “G. Galilei”, Università degli Studi di Padova and INFN, Sezione di Padova, Via Francesco Marzolo 8, I-35131, Padova, Italy;

关键词: CP violation;    Discrete Symmetries;    Neutrino Physics;    Beyond Standard Model;   

DOI  :  10.1007/JHEP07(2020)014

来源: Springer

【 摘 要 】

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.

【 授权许可】

Unknown