2024/09/18 by P. T. Quyen, Cao, Son, N. T. Hong Van +6
Computer Science · Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Computational Physics and Python Applications #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #Particle physics theoretical and experimental studies
paper · pdf · doi:10.48550/arxiv.2409.11824
openalex publication_date 2024/09/18 · openalex created_date 2024/10/25 · openalex updated_date 2026/07/30
Among three leptonic mixing angles, θ23 angle, which characterizes the fractional contribution of two flavor eigenstates νμ and ντ to the third mass eigenstate ν3, is known to be the largest but the least precisely measured. The work investigates possible reach of θ23 precision with two upcoming gigantic accelerator-based long-baseline neutrino experiments, namely Hyper-Kamiokande and DUNE experiments as well as a possible joint analyses of future neutrino facilities. Our simulation yields that each experiment will definitely establish the octant of θ23 angle for all values within 1σ parameter interval, while considering the current limitation. However, if the actual value is 0.48≤ sin2θ23≤ 0.54, it becomes challenging for these two experiments to reject the maximal (θ23=π/4) hypothesis and conclude its octant. This octant-blind region can be further explored with the proposed facilities ESSnuSB and a neutrino factory. Accurate determination of the mixing angle θ23, as well as the accuracy of δCP, is crucial for examining a certain category of discrete non-Abelian leptonic flavor models. Specifically if CP is conserved in leptonic sector, the combined analysis of Hyper-K and DUNE will rule out the majority of these models. However, if the CP is maximally violated, higher precision of δCP is necessary for testing these flavor models.