Abstract
This work extends the idea of using a cyclotron-based antineutrino source for purposes of neutrino physics. Long baseline experiments suffer from degeneracies and correlations between , and the mass hierarchy. However, the combination of a superconducting cyclotron and a big liquid scintillator detector like JUNO in a medium baseline experiment, which does not depend on the mass hierarchy, may allow to determine whether the position of the mixing angle is in the lower octant or the upper octant. Such an experiment would improve the precision of the measurement to a degree which depends on the CP-phase.
Highlights
The yellow area shows the 68.3% confidence interval, within which the experiment is insensitive to octant degeneracy
For these values a 5 MW cyclotron can distinguish the octant, if the mixing angle Θ23 is outside the range 38.5o − 52.9o
Increasing statistics causes an improvement in the sensitivity
Summary
The full description of our proposal is presented in [6], which is based on the DAEδALUS experiment project [7]. Where ∆ij = ∆m2ij ·L/(4Eν); ∆m2ij – the neutrino mass squared difference; L – the distance between source and detector; Eν – neutrino energy; δCP – Dirac phase of CP violation. Two cyclotrons (near and far) will be located at distances 1.5 km and 20 km respectively. The power of the near cyclotron is 1 MW. NH is assumed, because at the distance 20 km the experiment is insensitive to mass hierarchy. It is clear, that neutrino rate increases with the mixing angle Θ23
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