Physics Potentials with the Second Hyper-Kamiokande Detector in Korea

We have conducted sensitivity studies on an alternative configuration of the Hyper-Kamiokande experiment by locating the 2nd Hyper-Kamiokande detector in Korea at $\sim$1100$-\$1300 km baseline. Having two detectors at different baselines improves sensitivity to leptonic CP violation, neutrino mass ordering as well as nonstandard neutrino interactions. There are several candidate sites in Korea with greater than 1 km high mountains ranged at an 1$-$3 degree off-axis angle. Thanks to larger overburden of the candidate sites in Korea, low energy physics, such as solar and supernova neutrino physics as well as dark matter search, is expected to be improved. In this paper sensitivity studies on the CP violation phase and neutrino mass ordering are performed using current T2K systematic uncertainties in most cases. We plan to improve our sensitivity studies in the near future with better estimation of our systematic uncertainties

Ultrasonic propagation properties in magnetic functional fluids under magnetic fields

The RENO experiment reports more precisely measured values of theta(13) and vertical bar Delta m(ee)(2)vertical bar using similar to 2200 live days of data. The amplitude and frequency of reactor electron antineutrino ((nu) over bar (e)) oscillation are measured by comparing the prompt signal spectra obtained from two identical near and far detectors. In the period between August 2011 and February 2018, the far (near) detector observed 103 212 (850 666) (nu) over bar (e) candidate events with a background fraction of 4.8% (2.0%). A clear energy and baseline dependent disappearance of reactor (nu) over bar (e) is observed in the deficit of the measured number of (nu) over bar (e). Based on the measured far-to-near ratio of prompt spectra, we obtain sin(2)2 theta(13) = 0.0896 +/- 0.0048(stat) +/- 0.0047(syst) and vertical bar Delta m(ee)(2)vertical bar = [2.68 +/- 0.12(stat) +/- 0.07(syst)] x 10(-3) eV(2) Published by the American Physical Societ