Title
Improved measurement of neutrino oscillation parameters by the NOvA experiment
Date Issued
01 August 2022
Access level
open access
Resource Type
journal article
Author(s)
Acero M.A.
Adamson P.
Anfimov N.
Antoshkin A.
Arrieta-Diaz E.
Asquith L.
Aurisano A.
Back A.
Backhouse C.
Baird M.
Balashov N.
Baldi P.
Bambah B.A.
Bashar S.
Bays K.
Bernstein R.
Bhatnagar V.
Bhattarai D.
Bhuyan B.
Bian J.
Blair J.
Booth A.C.
Bowles R.
Bromberg C.
Buchanan N.
Butkevich A.
Calvez S.
Carroll T.J.
Catano-Mur E.
Choudhary B.C.
Christensen A.
Coan T.E.
Colo M.
Cremonesi L.
Davies G.S.
Derwent P.F.
Ding P.
Djurcic Z.
Dolce M.
Doyle D.
Dueñas Tonguino D.
Dukes E.C.
Duyang H.
Ehrlich R.
Elkins M.
Ewart E.
Feldman G.J.
Filip P.
Franc J.
Frank M.J.
Gallagher H.R.
Gandrajula R.
Gao F.
Giri A.
Gomes R.A.
Goodman M.C.
Grichine V.
Groh M.
Group R.
Guo B.
Habig A.
Hakl F.
Hall A.
Hartnell J.
Hatcher R.
Hausner H.
He M.
Heller K.
Hewes J.
Himmel A.
Holin A.
Huang J.
Jargowsky B.
Jarosz J.
Jediny F.
Johnson C.
Judah M.
Kakorin I.
Kaplan D.M.
Kalitkina A.
Keloth R.
Klimov O.
Koerner L.W.
Kolupaeva L.
Kotelnikov S.
Kralik R.
Kullenberg C.
Kubu M.
Kumar A.
Kuruppu C.D.
Kus V.
Lackey T.
Lang K.
Lasorak P.
Lesmeister J.
Lin S.
Lister A.
Liu J.
Lokajicek M.
Fermi National Accelerator Laboratory
Publisher(s)
American Physical Society
Abstract
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. This includes values of the charge parity symmetry (CP) violating phase in the vicinity of δCP=π/2 which are excluded by >3σ for the inverted mass ordering, and values around δCP=3π/2 in the normal ordering which are disfavored at 2σ confidence.
Volume
106
Issue
3
Language
English
OCDE Knowledge area
Física atómica, molecular y química
Scopus EID
2-s2.0-85136260691
Source
Physical Review D
ISSN of the container
24700010
Sponsor(s)
This document was prepared by the NOvA Collaboration using the resources of the Fermi National Accelerator Laboratory (Fermilab), a U.S. Department of Energy, Office of Science, HEP User Facility. Fermilab is managed by Fermi Research Alliance, LLC (FRA), acting under Contract No. DE-AC02-07CH11359. This work was supported by the U.S. Department of Energy; the U.S. National Science Foundation; the Department of Science and Technology, India; the European Research Council; the MSMT CR, GA UK, Czech Republic; the RAS, RFBR, Russian Ministry of Education and Science (RMES), RSF, and BASIS Foundation, Russia; CNPq and FAPEG, Brazil; STFC, UKRI, and the Royal Society, United Kingdom; and the State and University of Minnesota. We are grateful for the contributions of the staffs of the University of Minnesota at the Ash River Laboratory and of Fermilab.
Sources of information:
Directorio de Producción Científica
Scopus