Potential of octant degeneracy resolution in JUNO

TL;DR

This paper explores how combining a cyclotron-based antineutrino source with the JUNO detector could resolve the octant degeneracy of the neutrino mixing angle b2b3, improving measurement precision.

Contribution

It proposes a medium baseline experiment using cyclotron antineutrino sources with JUNO to determine the b2b3 octant, independent of the mass hierarchy.

Findings

Potential to resolve b2b3 octant degeneracy.

Enhanced b2b3 measurement precision.

Dependence of precision on CP-phase.

Abstract

This research continues to focus on the idea using cyclotronic antineutrino source for purposes of neutrino physics. Long baseline experiments suffer from degeneracies and correlations between $\Theta_{23}$, $\delta_{\rm CP}$ and the mass hierarchy (MH). However the combination of a superconductive cyclotron and a big liquid scintillator detector like JUNO in a medium baseline experiment, which does not depend on the MH, may allow us to determine whether the position of the mixing angle $\Theta_{23}$ is in the lower octant (LO) or upper octant (UO). Such an experiment would improve the precision of the $\Theta_{23}$ measurement to a degree which depends on the CP-phase.