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Precision measurement of neutrino oscillation at Hyper-Kamiokande

KMI Colloquium
2019-03-20 17:00
Akira Konaka (TRIUMF)
KMI Science Symposia (ES635)

“Precision measurement of neutrino oscillation at Hyper-Kamiokande”


Akira Konaka (TRIUMF)

March 20th (Wed.), 2019 17:00 – 18:00

KMI Science Symposia (ES635)


Hyper-Kamiokande is a next generation large scale neutrino detector in Japan with a
fiducial volume of 187 kton. Neutrinos from J-PARC accelerator provides high
statistics measurement of 3% accuracy in both neutrinos and anti-neutrinos beams
tuned at the first oscillation maximum. Atmospheric neutrinos provide high statistics
neutrino oscillation studies up to several oscillation maxima, which is called
oscillogram. Careful control of systematic uncertainties is essential to match the
high statistical precision. Taking the ratios between near and far detectors in the
accelerator neutrinos would cancel the systematic uncertainties in principle, but
there remains challenging difference in the energy and neutrino flavour (electron vs.
muon neutrinos) dependence of cross sections and the difference in detection
efficiencies between near and far detectors. In this talk, I will describe the approach
taken by Hyper-Kamiokande to carefully cancel and control the systematic
uncertainties. The high precision expands HyperK’s sensitivity to neutrino
astrophysics, such as the supernova neutrinos and higher energy astronomical
neutrinos, as well as the searches for dark matters and nucleon decays.