Home > Research > Publications & Outputs > Physics potential of a long baseline neutrino o...

### Electronic data

• pdf

Rights statement: 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

Accepted author manuscript, 4.64 MB, PDF document

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

Research output: Contribution to journalJournal article

Published
• Hyper-Kamiokande Proto-Collaboration
Close
Article number 053CO2 2015 Progress of Theoretical and Experimental Physics 5 2015 35 Published 19/05/15 English

### 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 $\sin^2\theta_{23}=0.5(0.45)$.

### Bibliographic note

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