A Long Baseline Neutrino Oscillation Experiment Using J-PARC Neutrino Beam and Hyper-Kamiokande

Group, Hyper-Kamiokande Working and Abe, K. and Aihara, H. and Andreopoulos, C. and Anghel, I. and Ariga, A. and Ariga, T. and Asfandiyarov, R. and Askins, M. and Back, J. J. and Ballett, P. and Barbi, M. and Barker, G. J. and Barr, G. and Bay, F. 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 Cafagna, F. S. and Carminati, G. and Catanesi, M. G. and Choi, K. and Collazuol, G. and Cowan, G. and Cremonesi, L. and Rosa, G. De and Densham, C. and Detwiler, J. and Dewhurst, D. and Lodovico, F. Di and Luise, S. Di and Drapier, O. and Emery, S. and Ereditato, A. and Feusels, T. and Finch, A. and Fitton, M. and Friend, M. and Fujii, Y. and Fukuda, Y. and Fukuda, D. and Galymov, V. and Ganezer, K. and Gonin, M. and Gumplinger, P. and Hadley, D. R. and Haegel, L. and Haesler, A. and Haga, Y. and Hartfiel, B. and Hartz, M. and Hayato, Y. and Hierholzer, M. and Himmel, A. and Hirota, S. and Horiuchi, S. and Huang, K. and Ichikawa, A. K. and Iijima, T. and Ikeda, M. and Imber, J. and Inoue, K. and Insler, J. and Intonti, R. A. and Irvine, T. and Ishida, T. and Ishino, H. and Ishitsuka, M. and Itow, Y. and Izmaylov, A. and Jamieson, B. and Jang, H. I. and Jiang, M. and Joo, K. K. and Kaboth, A. and Kajita, T. and Kameda, J. and Karadhzov, Y. and Katori, T. and Kearns, E. and Khabibullin, M. and Khotjantsev, A. and Kishimoto, Y. and Kobayashi, T. and Koga, M. and Konaka, A. and Kormos, L. L. and Korzenev, A. and Koshio, Y. and Kropp, W. R. and Kudenko, Y. and Kutter, T. and Kuze, M. and Labarga, L. and Lagoda, J. and Laveder, M. and Lawe, M. and Learned, J. G. and Lim, I. T. and Lindner, T. and Longhin, A. and Ludovici, L. and Magaletti, L. and Mahn, K. and Malek, M. and Mariani, C. and Marti, L. and Martins, P. P. J. and Mazzucato, E. and McCauley, N. and McFarland, K. S. and McGrew, C. and Mezzetto, M. and Minakata, H. and Minamino, A. and Mine, S. and Mineev, O. and Miura, M. and Monroe, J. and Mori, T. and Moriyama, S. and Mueller, T. and Muheim, F. and Nakahata, M. and Nakamura, K. and Nakaya, T. and Nakayama, S. and Nicholls, T. and Nirkko, M. and Nishimura, Y. and Noah, E. and Nowak, J. and Nunokawa, H. and O'Keeffe, H. M. and Okajima, Y. and Oser, S. M. and O'Sullivan, E. and Oyama, Y. and Perez, J. and Pac, M. Y. and Palladino, V. and Palomino, J. L. and Paolone, V. and Payne, D. and Perevozchikov, O. and Perkin, J. D. and Pistillo, C. and Playfer, S. and Posiadala-Zezula, M. and Poutissou, J. -M. and Quilain, B. and Quinto, M. and Radicioni, E. and Ratoff, P. N. and Ravonel, M. and Rayner, M. and Redij, A. and Retiere, F. and Riccio, C. and Richard, E. and Rondio, E. and Ross-Lonergan, M. and Rott, C. and Rountree, S. D. and Rubbia, A. and Sacco, R. and Sakuda, M. and Sanchez, M. C. and Scantamburlo, E. and Scholberg, K. and Seiya, Y. and Sekiguchi, T. and Sekiya, H. and Shaikhiev, A. and Shimizu, I. and Shiozawa, M. and Sinnis, G. and Smy, M. B. and Sobczyk, J. and Sobel, H. W. and Stewart, T. and Suda, Y. and Suzuki, Y. and Suzuki, A. T. and Svoboda, R. and Tacik, R. and Takeda, A. and Taketa, A. and Tanaka, H. A. and Tanaka, H. K. M. and Tanaka, H. and Terri, R. and Thorpe, M. and Tobayama, S. and Tolich, N. and Tomura, T. and Touramanis, C. and Tsukamoto, T. and Tzanov, M. and Uchida, Y. and Vagins, M. R. and Vasseur, G. and Vogelaar, R. B. and Wark, D. and Wascko, M. O. and Weber, A. and Wendell, R. and Wilkes, R. J. and Wilking, M. J. and Xin, T. and Yamamoto, K. and Yanagisawa, C. and Yano, T. and Yen, S. and Yershov, N. and Yokoyama, M. and Zito, M. (2014) A Long Baseline Neutrino Oscillation Experiment Using J-PARC Neutrino Beam and Hyper-Kamiokande. arxiv.org.

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Hyper-Kamiokande will be a next generation underground water Cherenkov detector with a total (fiducial) mass of 0.99 (0.56) million metric tons, approximately 20 (25) times larger than that of Super-Kamiokande. One of the main goals of Hyper-Kamiokande is the study of $CP$ asymmetry in the lepton sector using accelerator neutrino and anti-neutrino beams. In this document, the physics potential of a long baseline neutrino experiment using the Hyper-Kamiokande detector and a neutrino beam from the J-PARC proton synchrotron is presented. The analysis has been updated from the previous Letter of Intent [K. Abe et al., arXiv:1109.3262 [hep-ex]], based on the experience gained from the ongoing T2K experiment. With a total exposure of 7.5 MW $\times$ 10$^7$ sec integrated proton beam power (corresponding to $1.56\times10^{22}$ protons on target with a 30 GeV proton beam) to a $2.5$-degree off-axis neutrino beam produced by the J-PARC proton synchrotron, it is expected that the $CP$ phase $\delta_{CP}$ can be determined to better than 19 degrees for all possible values of $\delta_{CP}$, and $CP$ violation can be established with a statistical significance of more than $3\,\sigma$ ($5\,\sigma$) for $76%$ ($58%$) of the $\delta_{CP}$ parameter space.

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Document submitted to 18th J-PARC PAC meeting in May 2014. 50 pages, 41 figures
?? physics.ins-dethep-exhep-ph ??
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15 Sep 2017 10:42
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18 May 2024 01:21