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New constraints on oscillation parameters from ν_e appearance and ν_μ disappearance in the NOvA experiment

Acero, M. A. and Bays, K. and Lozier, J. and Mualem, L. and Patterson, R. B. and Pershey, D. (2018) New constraints on oscillation parameters from ν_e appearance and ν_μ disappearance in the NOvA experiment. Physical Review D, 98 (3). Art. No. 032012. ISSN 2470-0010. http://resolver.caltech.edu/CaltechAUTHORS:20180824-075143059

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Abstract

We present updated results from the NOvA experiment for ν_μ → ν_μ and ν_μ → ν_e oscillations from an exposure of 8.85×10^(20) protons on target, which represents an increase of 46% compared to our previous publication. The results utilize significant improvements in both the simulations and analysis of the data. A joint fit to the data for ν_μ disappearance and ν_e appearance gives the best-fit point as normal mass hierarchy, Δm^2_(32) = 2.44×10^(-3)  eV^2/c^4, sin^2 θ_(23) = 0.56, and δ_(CP) = 1.21π. The 68.3% confidence intervals in the normal mass hierarchy are Δm^2_(32) ∈ [2.37,2.52] × 10^(-3)  eV^2/c^4, sin^2 θ_(23) ∈ [0.43,0.51] ∪ [0.52,0.60], and δ_(CP) ∈ [0,0.12π] ∪ [0.91π,2π]. The inverted mass hierarchy is disfavored at the 95% confidence level for all choices of the other oscillation parameters.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1103/PhysRevD.98.032012DOIArticle
https://arxiv.org/abs/1806.00096arXivDiscussion Paper
ORCID:
AuthorORCID
Patterson, R. B.0000-0002-5787-9517
Additional Information:© 2018 Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3. Received 1 June 2018; published 24 August 2018. 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, RMES, RSF, and BASIS Foundation, Russia; CNPq and FAPEG, Brazil; and the state and University of Minnesota. We are grateful for the contributions of the staffs at the University of Minnesota module assembly facility and Ash River Laboratory, Argonne National Laboratory, and Fermilab. Fermilab is operated by Fermi Research Alliance, LLC, under Contract No. DE-AC02-07CH11359 with the U.S. DOE.
Funders:
Funding AgencyGrant Number
Department of Energy (DOE)DE-AC02-07CH11359
NSFUNSPECIFIED
Department of Science and Technology (India)UNSPECIFIED
European Research Council (ERC)UNSPECIFIED
Ministerstvo školství, mládeže a tělovýchov (MSMT)UNSPECIFIED
Charles University Grant Agency (GA UK)UNSPECIFIED
Russian Academy of SciencesUNSPECIFIED
Russian Foundation for Basic ResearchUNSPECIFIED
Ministry of Education and Science (Russia)UNSPECIFIED
Russian Science FoundationUNSPECIFIED
BASIS FoundationUNSPECIFIED
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)UNSPECIFIED
Fundação de Amparo à Pesquisa do Estado de Goiás (FAPEG)UNSPECIFIED
State of MinnesotaUNSPECIFIED
University of MinnesotaUNSPECIFIED
Record Number:CaltechAUTHORS:20180824-075143059
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20180824-075143059
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:89121
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:24 Aug 2018 16:16
Last Modified:24 Aug 2018 16:16

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