169988 20260316092629.0 doi 10.1140/epjc/s10052-025-14938-9 sideral 148627 ART-2026-148627 eng Abe, K. Sensitivity of the Hyper-Kamiokande experiment to neutrino oscillation parameters using accelerator neutrinos 2026 This paper presents the expected sensitivity to the neutrino oscillation parameters of the Hyper-Kamiokande long-baseline program. The Hyper-Kamiokande experiment, currently under construction in Japan, will measure the oscillations of accelerator-produced neutrinos with thousands of selected events per sample: this corresponds to an increase of statistics of a factor 25–100 with respect to recent results from the currently-running long-baseline neutrino oscillation experiment in Japan, T2K. In the most favorable scenario we will achieve the discovery of Charge-Parity (CP) violation in neutrino oscillation at 5σ C.L. in less than 3 years. With 10 years of data-taking, and assuming a neutrino : antineutrino beam running ratio of 1:3, a CP violation discovery at 5σ C.L. is possible for more than 60% of the actual values of the CP-violating phase, δCP. Moreover, we will measure δCP with a precision ranging from 20∘, in the case of maximal CP violation, to 6∘, in the case of CP conservation. We aim to achieve a 0.5% resolution on the Δm322 parameter, and a resolution between 3% and 0.5% on the sin2θ23 parameter, depending on its true value. These results are obtained by extending the analysis methods of T2K with dedicated tuning to take into account the Hyper-Kamiokande design: the larger far detector, the more powerful beam, the upgraded near detector ND280, and the planned additional Intermediate Water Cherenkov Detector. Access copy available to the general public Unrestricted info:eu-repo/grantAgreement/ES/MCIU/PID2022-139198NB-I00 info:eu-repo/grantAgreement/ES/MICINN/PID2021-124050NB-C31 info:eu-repo/grantAgreement/ES/MICINN/PID2022-136297NB-I00 info:eu-repo/grantAgreement/ES/NextGenerationEU/PRTR info:eu-repo/semantics/openAccess by https://creativecommons.org/licenses/by/4.0/deed.es info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Afif, M. T. Anthony, L. Araya, A. Arguello Quiroga, A. Arimoto, S. Batkiewicz-Kwasniak, M. Beauchêne, A. Casado, M. P. Catanesi, M. G. Cavanagh, C. Cebrián, S. Universidad de Zaragoza (orcid)0000-0002-6948-5101 2004 390 Universidad de Zaragoza Dpto. Física Teórica Área Física Atóm.Molec.y Nucl. 86, 2 (2026), [18 pp.] Eur. phys. j., C The European Physical Journal C 1434-6044 2130309 http://zaguan.unizar.es/record/169988/files/texto_completo.pdf Versión publicada 3397834 http://zaguan.unizar.es/record/169988/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:169988 articulos driver 2026-03-16-08:16:21 ARTICLE