New constraints on oscillation parameters from $ν_{e}$ appearance and $ν_{μ}$ disappearance in the NOvA experiment

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24 August 2018

journal article
research article
Published by American Physical Society (APS) in Physical Review D

Vol. 98 (3) , 032012
DOI:10.1103/physrevd.98.032012

Abstract

We present updated results from the NOvA experiment for

ν_{μ} \to ν_{μ}

and

ν_{μ} \to ν_{e}

oscillations from an exposure of

8.85 \times 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,

Δ m_{32}^{2} = 2.44 \times 10^{- 3} {eV}^{2} / c^{4}

\sin^{2} θ_{23} = 0.56

, and

δ_{CP} = 1.21 π

. The 68.3% confidence intervals in the normal mass hierarchy are

Δ m_{32}^{2} \in [2.37, 2.52] \times 10^{- 3} {eV}^{2} / c^{4}

\sin^{2} θ_{23} \in [0.43, 0.51] \cup [0.52, 0.60]

, and

δ_{CP} \in [0, 0.12 π] \cup [0.91 π, 2 π]

. The inverted mass hierarchy is disfavored at the 95% confidence level for all choices of the other oscillation parameters.

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Version 1, 2018-05-31, ArXiv (Unconfirmed version)

Funding Information

U.S. Department of Energy (DE-AC02-07CH11359)
National Science Foundation
Department of Science and Technology, Ministry of Science and Technology
H2020 European Research Council
Ministerstvo Školství, Mládeže a T?lovýchovy
Russian Academy of Sciences
Russian Foundation for Basic Research
Russian Science Foundation
Conselho Nacional de Desenvolvimento Científico e Tecnológico
Fundação de Amparo à Pesquisa do Estado de Goiás
University of Minnesota
Fermilab
RMES
Basis Foundation

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New constraints on oscillation parameters fromνeappearance andνμdisappearance in the NOvA experiment

Abstract

Keywords

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Funding Information

New constraints on oscillation parameters from $ν_{e}$ appearance and $ν_{μ}$ disappearance in the NOvA experiment