Complementarity between Hyperkamiokande and DUNE in determining neutrino oscillation parameters

摘要: Abstract In this work we investigate the sensitivity to neutrino mass hierarchy, octant of mixing angle θ 23 and CP phase δ C P in future long baseline experiments T2HK DUNE as well atmospheric observation at Hyperkamiokande (HK). We show for first time that is enhanced greatly if combine these three experiments. Our results hierarchy both HK are limited due presence parameter degeneracy. But degeneracy removed when added together. With + (DUNE), can be determined least 5σ (8σ) C.L. any value true . significance increases almost 15σ unfavorable For combined setup, resolved except 43.5 ° 48 hierarchies irrespective The violation around 10σ ∼ ± 90 Apart from facility has capability discover 68 % fraction values also find that, with combination all three, precision Δ m eff 2 , sin ⁡ becomes 0.3%, 2% 20% respectively. clarify how occurs experiment.