Электронный каталог

Статья

Stepanova, A.V.
Joint Fit of Long-Baseline Accelerator Neutrino Experiments in GNA Software : [Abstract] / A.V.Stepanova, L.D.Kolupaeva // Физика элементарных частиц и атомного ядра. Письма. – 2023. – Т.20, №5. – P.1302-1303. – URL: http://www1.jinr.ru/Pepan_letters/panl_2023_5/43_Stepanova_ann.pdf.

Long-baseline accelerator neutrino experiments are developing their neutrino data analysis in order to define the charge-parity phase δCP and the neutrino mass ordering which are important in describing neutrino oscillations and other phenomena of elementary particle physics. Since neutrinos interact very weakly, it takes a long time to collect significant event statistics. Currently working experiments, NOvA and T2K, are not able to reach 5σ significance level separately to find out the values of unknown oscillation parameters. Future long-baseline accelerator neutrino experiment DUNE will also measure these oscillation parameters. These experiments have the similar composition for neutrino observation. A unified framework in the GNA software is developed to predict single and joint sensitivities of experiments of this type. It is expected that single NOvA and T2K sensitivities to the neutrino mass ordering and the charge-parity phase are much smaller than the expected DUNE sensitivities. From the analysis of joint sensitivities, it is found that the hypothesis of the charge-parity conservation (δCP = 0, ±π) is disfavored at > 5σ significance level for 60 % of possible δCP values for event rates accumulated by 36 · 1020 POT exposure in each regime in NOvA, 200 · 1020 POT exposure in T2K and after seven years of DUNE running time. DUNE sensitivities to the neutrino mass ordering after two years are comparable to joint NOvA and T2K sensitivities



ОИЯИ = ОИЯИ (JINR)2023
Спец.(статьи,препринты) = С 346.1а - Свойства нейтрино
Спец.(статьи,препринты) = Ц 840 в - Программы обработки экспериментальных данных и управление физическими установками$