Physics potentials with the second Hyper-Kamiokande Detector in Korea

Abe, K. and Abe, Ke and Aihara, H. and Aimi, A. and Akutsu, R. and Andreopoulos, C. and Anghel, I. and Antonova, M. and AshidaK, Y. and Barbi, M. and Barker, G. J. and Barr, G. and Beltrame, P. and Berardi, V. and Bergevin, M. and Berkman, S. and Berry, T. and Bhadra, S. and Blaszczyk, F. d. M. and Blondel, A. and Bolognesi, S. and Bravar, A. and Bronner, C. and Buizza, M. and Cafagna, F. S. and Calland, R. and CaoK, S. and Catanesi, M. G. and Checchia, C. and Chen-Wishart, Z. and Choi, K. and Coleman, J. and Collazuol, G. and Cowan, G. and Cremonesi, L. and Dealtry, T. and Rosa, G. De and Densham, C. and Dewhurst, D. and Drakopoulou, E. L. and Lodovico, F. Di and Drapier, O. and Dunne, P. and Finch, A. and Grant, N. and Kormos, L. L. and Lawe, M. and Nowak, J. and O'Keeffe, H. M. and Ratoff, P. N. (2018) Physics potentials with the second Hyper-Kamiokande Detector in Korea. Progress of Theoretical and Experimental Physics, 2018 (6). ISSN 2050-3911

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Hyper-Kamiokande consists of two identical water-Cherenkov detectors of total 520 kt, with the first one in Japan at 295 km from the J-PARC neutrino beam with 2.5 degrees off-axis angles (OAAs), and the second one possibly in Korea at a later stage. Having the second detector in Korea would benefit almost all areas of neutrino oscillation physics, mainly due to longer baselines. There are several candidate sites in Korea with baselines of 1000-1300 km and OAAs of 1 degrees-3 degrees. We conducted sensitivity studies on neutrino oscillation physics for a second detector, either in Japan (JD x 2) or Korea (JD + KD), and compared the results with a single detector in Japan. Leptonic charge-parity (CP) symmetry violation sensitivity is improved, especially when the CP is non-maximally violated. The larger matter effect at Korean candidate sites significantly enhances sensitivities to non-standard interactions of neutrinos and mass ordering determination. Current studies indicate the best sensitivity is obtained at Mt. Bisul (1088 km baseline, 1.3 degrees OAA). Thanks to a larger (1000 m) overburden than the first detector site, clear improvements to sensitivities for solar and supernova relic neutrino searches are expected.

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Journal Article
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Progress of Theoretical and Experimental Physics
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29 Jun 2018 13:30
Last Modified:
01 Oct 2020 01:47