Abstract
Tridirect $CP$ symmetry is an economical neutrino model building paradigm, and it allows for the description of neutrino masses, mixing angles, and $CP$ violation phases in terms of four free parameters. The viability of a class of tridirect $CP$ models is examined with a comprehensive simulation of current and future neutrino oscillation experiments. The full parameter space of four independent parameters is carefully scanned, and the problem of parameter degeneracy appears for the constraints from one group of neutrino oscillation experiments. Two benchmark models which are promising from a model building point of view are also examined. Complementary roles from accelerator neutrino experiments (e.g., T2HK and DUNE) and reactor neutrino experiments (e.g., JUNO) are crucial to break the degeneracy and nail down the fundamental neutrino mixing parameters of the underlying theory.
Highlights
Neutrinos in the standard model (SM) of particle physics are strictly massless
We study the precision of model parameters for different experimental configurations and discuss a degeneracy problem, which can be resolved by including Jiangmen Underground Neutrino Observatory (JUNO) data
The more powerful aspect is the model predicted correlations of standard neutrino mixing parameters preserved by an underlying symmetry
Summary
Neutrinos in the standard model (SM) of particle physics are strictly massless. Neutrino oscillation requires masssquared differences and nonzero neutrino masses, which is striking new physics beyond the SM and calls for new degrees of freedom. [22,23,24,25,26,27,28,29,30,31,32]) It is a question of whether we are able to test different flavor and CPviolation models directly in running accelerator neutrino experiments like T2K [4,33] and NOνA [9,34,35], and future neutrino oscillation experiments like DUNE [36] and T2HK [37].
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
