J-PARC Neutrino Beamline Upgrade Technical Design Report
physics.ins-det
/ Authors
K. Abe, H. Aihara, A. Ajmi, C. Alt, C. Andreopoulos, M. Antonova, S. Aoki, Y. Asada, Y. Ashida, A. Atherton
and 375 more authors
E. Atkin, S. Ban, F. C. T. Barbato, M. Barbi, G. J. Barker, G. Barr, M. Batkiewicz, A. Beloshapkin, V. Berardi, L. Berns, S. Bhadra, J. Bian, S. Bienstock, A. Blondel, S. Bolognesi, J. Borg, B. Bourguille, S. B. Boyd, D. Brailsford, A. Bravar, S. Bron, C. Bronner, M. Buizza Avanzini, N. F. Calabria
/ Abstract
In this document, technical details of the upgrade plan of the J-PARC neutrino beamline for the extension of the T2K experiment are described. T2K has proposed to accumulate data corresponding to $2\times{}10^{22}$ protons-on-target in the next decade, aiming at an initial observation of CP violation with $3σ$ or higher significance in the case of maximal CP violation. Methods to increase the neutrino beam intensity, which are necessary to achieve the proposed data increase, are described.