# Physics potential of a long baseline neutrino oscillation experiment using J-PARC neutrino beam and Hyper-Kamiokande

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 Boyd, S. B. and Bravar, A. and Bronner, C. and Cafagna, F. S. and Carminati, G. and Cartwright, S. L. and Catanesi, M. G. and Choi, K. and Choi, J. H. and Collazuol, G. and Cowan, G. and Cremonesi, L. and Davies, G. 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 Finch, A. and Kormos, L. L. and Lawe, M. and Nowak, J. and O'Keeffe, H. M. and Ratoff, P. N. (2015) Physics potential of a long baseline neutrino oscillation experiment using J-PARC neutrino beam and Hyper-Kamiokande. Progress of Theoretical and Experimental Physics, 2015 (5). ISSN 2050-3911

Other (pdf)
1502.05199v2 - Accepted Version

## Abstract

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 paper, 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 uses the framework and systematic uncertainties derived 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, it is expected that the leptonic $CP$ 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. Using both $\nu_e$ appearance and $\nu_\mu$ disappearance data, the expected 1$\sigma$ uncertainty of $\sin^2\theta_{23}$ is 0.015(0.006) for $\sin^2\theta_{23}=0.5(0.45)$.

Item Type:
Journal Article
Journal or Publication Title:
Progress of Theoretical and Experimental Physics
40 pages, 26 figures This is a pre-copy-editing, author-produced PDF of an article accepted for publication in Progress of Theoretical and Experimental Physics following peer review. The definitive publisher-authenticated version Physics potential of a long-baseline neutrino oscillation experiment using a J-PARC neutrino beam and Hyper-Kamiokande Hyper-Kamiokande Proto-Collaboration, Progress of Theoretical and Experimental Physics 2015 5: 053CO2 is available online at: http://ptep.oxfordjournals.org/content/2015/5/053C02
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100
Subjects:
Departments:
ID Code:
73861
Deposited By:
Deposited On:
18 Jun 2015 05:55
Refereed?:
Yes
Published?:
Published