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

, Hyper-Kamiokande Proto-Collaboration (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

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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
Additional Information:
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:
ID Code:
73861
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Deposited On:
18 Jun 2015 05:55
Refereed?:
Yes
Published?:
Published
Last Modified:
25 Oct 2020 03:15