A Δ(27) flavor-symmetric type-II seesaw model reproduces neutrino oscillation data only after an ad hoc diagonal perturbation is added, and its CP violation predictions reduce to parameter scans.
The NOvA Experiment: Status and Outlook
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The NOvA long-baseline neutrino oscillation experiment is currently under construction and will use an upgraded NuMI neutrino source at Fermilab and a 14-kton detector at Ash River, Minnesota to explore the neutrino sector. NOvA uses a highly active, finely segmented detector design that offers superb event identification capability, allowing precision measurements of \nu_e/\nu_e-bar appearance and \nu_\mu/\nu_\mu-bar disappearance, through which NOvA will provide constraints on \theta_13, \theta_23, |\Delta m^2_atm|, the neutrino mass hierarchy, and the CP-violating phase \delta. In this article, we review NOvA's uniquely broad physics scope, including sensitivity updates in light of the latest knowledge of \theta_13, and we discuss the experiment's construction and operation timeline.
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Phenomenological Study of Type II Seesaw with $\Delta(27)$ Symmetry
A Δ(27) flavor-symmetric type-II seesaw model reproduces neutrino oscillation data only after an ad hoc diagonal perturbation is added, and its CP violation predictions reduce to parameter scans.