Abstract
Non-Abelian discrete symmetries provide an interesting opportunity to address the flavor puzzle in the lepton sector. However, the number of currently viable models based on such symmetries is rather large. High-precision measurements of the leptonic mixing parameters by future neutrino experiments, including ESSnuSB, T2HK, DUNE, and JUNO, will be crucial to test such models. We show that the complementarity among these experiments offers a powerful tool for narrowing down this broad class of lepton flavor models.
Highlights
In the Standard Model (SM) of particles and their interactions, quarks and leptons come in three generations or families
If the true values of sin2 θ23 and δCP fall inside the regions, the test model is compatible with the Asimov data at the shown confidence level
ESSnuSB and DUNE can only exclude Models 1.3 and 1.5 at 3σ if the true values of sin2 θ23 and δCP are in the vicinity of the current best fit for normal ordering (NO)
Summary
In the Standard Model (SM) of particles and their interactions, quarks and leptons come in three generations or families. We do not know why the mixing patterns in the quark and lepton sectors are so different, and whether their structures point to any organizing principle or not All these questions form the so-called flavor problem. Lepton mixing featuring two large and one small mixing angles may originate from non-Abelian discrete flavor symmetries. Such a possibility has been widely explored over the past decades We confronted the predictions of 18 models with current global neutrino oscillation data [29,30]
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