Electron neutrino appearance in the NOvA experiment

doi:10.1088/1742-6596/888/1/012062

Title: Electron neutrino appearance in the NOvA experiment

Abstract

NOvA is an off-axis, two-detector experiment studying neutrino oscillations with the ν(µ) beam from Fermilab. This paper describes the ν_e appearance analysis, including data-driven constraints from Near Detector measurements. The data set corresponds to an exposure equivalent to 6.05 × 10²⁰ protons-on-target in the Far Detector. Here, we observed 33 ν_e candidates with a predicted background of 8.2 ± 0.8 (syst.), for a significance of appearance higher than 8σ. Preliminary results for the allowed values of δ_CP and θ ₂₃ in both hierarchies are presented.

Authors:

^[1]

Iowa State Univ., Ames, IA (United States)

Publication Date:: 2017-09-20

Research Org.:: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)

Sponsoring Org.:: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)

Contributing Org.:: NOvA Collaboration

OSTI Identifier:: 1498562

Report Number(s):: FERMILAB-CONF-16-778-E
Journal ID: ISSN 1742-6588; 1625597

Grant/Contract Number:: AC02-07CH11359

Resource Type:: Accepted Manuscript

Journal Name:: Journal of Physics. Conference Series

Additional Journal Information:: Journal Volume: 888; Journal Issue: 1; Journal ID: ISSN 1742-6588

Publisher:: IOP Publishing

Country of Publication:: United States

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats


                    Catano-Mur, E. Electron neutrino appearance in the NOvA experiment.  United States: N. p., 2017. 
        Web.  doi:10.1088/1742-6596/888/1/012062.

Copy to clipboard


                    Catano-Mur, E. Electron neutrino appearance in the NOvA experiment.  United States.  doi:https://doi.org/10.1088/1742-6596/888/1/012062

Copy to clipboard


                    Catano-Mur, E. Wed .  
        "Electron neutrino appearance in the NOvA experiment".  United States.  doi:https://doi.org/10.1088/1742-6596/888/1/012062.  https://www.osti.gov/servlets/purl/1498562.

Copy to clipboard


                    
@article{osti_1498562,

  title        = {Electron neutrino appearance in the NOvA experiment},

  author       = {Catano-Mur, E.},

  abstractNote = {NOvA is an off-axis, two-detector experiment studying neutrino oscillations with the ν(µ) beam from Fermilab. This paper describes the νe appearance analysis, including data-driven constraints from Near Detector measurements. The data set corresponds to an exposure equivalent to 6.05 × 1020 protons-on-target in the Far Detector. Here, we observed 33 νe candidates with a predicted background of 8.2 ± 0.8 (syst.), for a significance of appearance higher than 8σ. Preliminary results for the allowed values of δCP and θ 23 in both hierarchies are presented.},

  doi          = {10.1088/1742-6596/888/1/012062},

  journal      = {Journal of Physics. Conference Series},

  number       = 1,

  volume       = 888,

  place        = {United States},

  year         = {2017},

  month        = {9}

}

Copy to clipboard

Journal Article:

Free Publicly Available Full Text

Accepted Manuscript (DOE)

Publisher's Version of Record

DOI: https://doi.org/10.1088/1742-6596/888/1/012062

Other availability

Search WorldCat to find libraries that may hold this journal

Figures / Tables:

Figure 1: (a) Contained and (c) uncontained $v_µ$ events in the ND used to correct the beam $v_e$ from pions and kaons. (b) Pion weights from $v_µ$ as function of the pion momentum (color), overlaid with the $v_e$ CC distribution (boxes).

All figures and tables (4 total)

Save / Share:

Export Metadata

Save to My Library

Figures / Tables found in this record:

Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.

Similar Records in DOE PAGES and OSTI.GOV collections:

Constraints on oscillation parameters from $v_{e}$ appearance and $v_{μ}$ disappearance in NOvA

Journal Article Adamson, P. ; Aliaga, L. ; Ambrose, D. ; ... - Physical Review Letters

Results are reported from an improved measurement of ν_μ → ν_e transitions by the NOvA experiment. Using an exposure equivalent to 6.05 × 10²⁰ protons on target, 33 νe candidates are observed with a background of 8.2 ± 0.8 (syst.). In this paper, combined with the latest NOvA νμ disappearance data and external constraints from reactor experiments on sin²2θ₁₃, the hypothesis of inverted mass hierarchy with θ₂₃ in the lower octant is disfavored at greater than 93% C.L. for all values of δ_CP.
Cited by 27
DOI: https://doi.org/10.1103/PhysRevLett.118.231801

Full Text Available
First neutrino oscillation measurements in NOvA

Journal Article Messier, M. D. - Nuclear Physics. B

In this study, the NOvA experiment uses the Fermilab NuMI neutrino beam and a newly constructed 14 kt detector to address several open questions in neutrino oscillations including the neutrino mass hierarchy, the precise value of the angle θ₂₃, and the CP-violating phase δ_CP. The experiment has been running since 2014 and has recently released its first results from an equivalent exposure of 2.74 × 10²⁰ protons-on-target equal to 8% of the eventual data set. Measurements of ν_μ → ν_μ oscillations find Δm²₃₂ = (2.52^+0.2_–0.18) × 10^-3 eV² and 0.38 < sin²θ₂₃ < 0.65 for the normal neutrino mass hierarchy.more »« less
DOI: https://doi.org/10.1016/j.nuclphysb.2016.04.027
Electron Neutrino Appearance in the MINOS Experiment

Thesis/Dissertation Orchanian, Mhair-armen Hagop

This thesis describes a search for v_e appearance in the two-detector long-baseline MINOS neutrino experiment at Fermilab, based on a data set representing an exposure of 8.2×10²⁰ protons on the NuMI target. The analysis detailed herein represents an increase in sensitivity to the θ₁₃ mixing angle of approximately 25% over previous analyses, due to improvements in the event discriminant and fitting technique. Based on our observation, we constrain the value of θ₁₃ further, finding 2 sin²θ ₂₃ sin²θ ₁₃< 0.12(0.20) at the 90% confidence level for δ_CP = 0 and the normal (inverted) neutrino mass hierarchy. The best-fitmore »« less
DOI: https://doi.org/10.2172/1156435

Full Text Available
A Measurement of $$\nu_e$$ Appearance and $$\nu_\mu$$ Disappearance Neutrino Oscillations with the NOvA Experiment

Thesis/Dissertation Pershey, Daniel Stephen

NOvA is a two-detector, neutrino oscillation experiment on an 810 km baseline in the NuMI beam at Fermilab. NuMI is an off-axis, narrow-band beam centered near 1.8 GeV and is configurable to send a high-puritymore »« less
DOI: https://doi.org/10.2172/1484186

Full Text Available
Observation of Electron Neutrino Appearance in the NuMI Beam with the NOvA Experiment

Thesis/Dissertation Niner, Evan David

NOvA is a long-baseline neutrino oscillation experiment that uses two functionally identical detectors separated by 810 kilometers at locations 14 milliradians off-axis from the NuMI muon neutrino beam at Fermilab. At these locations the beam energy peaks at 2 GeV. This baseline is the longest in the world for an accelerator-based neutrino oscillation experiment, which enhances the sensitivity to the neutrino mass ordering. The experiment studies oscillations of the muon neutrino and anti-neutrino beam that is produced. Both detectors completed commissioning in the summer of 2014 and continue to collect data. One of the primary physics goals of the experimentmore »« less
DOI: https://doi.org/10.2172/1221353

Full Text Available

Similar Records