Review Article

Future Long-Baseline Neutrino Facilities and Detectors

Table 7

Expected detector performance of Hyper-Kamiokande.

Resolution or efficiency

Vertex resolution
 at 500 MeV/ 28 cm (electron)/23 cm (muon)
 at 5 GeV/ 27 cm (electron)/32 cm (muon)
Particle ID
 at 500 MeV/ % (electron)/ % (muon)
 at 5 GeV/ % (electron)/ % (muon)
Momentum resolution
 at 500 MeV/ 5.6% (electron)/3.6% (muon)
 at 5 GeV/ 2.0% (electron)/1.6% (muon)
Electron tagging
 from 500 MeV/ decays 98%
 from 5 GeV/ decays 58%

J-PARC signal efficiency 64% (nominal)/50% (tight)
J-PARC CC background rejection 99.9%
J-PARC background rejection 95% (nominal)/97.6% (tight)

efficiency ( / intranuclear scattering) 45%
Atmospheric background 1.6 events/Mton/year
efficiency by prompt tagging method 7.1%
atmospheric background 1.6 events/Mton/year
efficiency 6.7%
atmospheric background 6.7 events/Mton/year

Vertex resolution for 10 MeV electrons 90 cm
Angular resolution for 10 MeV electrons 30°
Energy resolution for 10 MeV electrons 20%