A new up-down flux ratio for sub-GeV atmospheric neutrinos enables Hyper-Kamiokande to measure the CP-violating phase with sensitivity surpassing T2HK near delta_CP of 90 and 270 degrees.
The angular ranges are chosen to reduce the smearing between up and downgo- ing samples while maintaining good statistics
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Towards Measuring the CP-Violating Phase with Atmospheric Neutrinos
A new up-down flux ratio for sub-GeV atmospheric neutrinos enables Hyper-Kamiokande to measure the CP-violating phase with sensitivity surpassing T2HK near delta_CP of 90 and 270 degrees.