Improved measurement of neutrino oscillation parameters by the NOvA experiment

0563824 - FZÚ 2023 RIV US eng J - Článek v odborném periodiku
Acero, M. A. - Adamson, P. - Aliaga, L. - Filip, Peter - Hakl, František - Lokajíček, Miloš - Zálešák, Jaroslav … celkem 205 autorů
Improved measurement of neutrino oscillation parameters by the NOvA experiment.
Physical Review D. Roč. 106, č. 3 (2022), č. článku 032004. ISSN 2470-0010. E-ISSN 2470-0029
Výzkumná infrastruktura: Fermilab-CZ II - 90113
Institucionální podpora: RVO:68378271 ; RVO:67985807
Klíčová slova: NOvA * CP: violation * asymmetry * neutrino: mixing angle
Obor OECD: Particles and field physics; Particles and field physics (UIVT-O)
Impakt faktor: 5, rok: 2022
Způsob publikování: Open access

We present new νμ→νe, νμ→νμ, ν¯μ→ν¯e, and ν¯μ→ν¯μ oscillation measurements by the NOvA experiment, with a 50% increase in neutrino-mode beam exposure over the previously reported results. The additional data, combined with previously published neutrino and antineutrino data, are all analyzed using improved techniques and simulations. A joint fit to the νe, νμ, ν¯e, and ν¯μ candidate samples within the 3-flavor neutrino oscillation framework continues to yield a best-fit point in the normal mass ordering and the upper octant of the θ23 mixing angle, with Δm322=(2.41±0.07)×10-3  eV2 and sin2θ23=0.57-0.04+0.03. The data disfavor combinations of oscillation parameters that give rise to a large asymmetry in the rates of νe and ν¯e appearance.

Trvalý link: https://hdl.handle.net/11104/0335615