skip to main content
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: First Measurement of Electron Neutrino Appearance in NOvA

Abstract

We report results from the first search for $$\nu_\mu\to\nu_e$$ transitions by the NOvA experiment. In an exposure equivalent to $$2.74\times10^{20}$$ protons-on-target in the upgraded NuMI beam at Fermilab, we observe 6 events in the Far Detector, compared to a background expectation of $$0.99\pm0.11$$ (syst.) events based on the Near Detector measurement. A secondary analysis observes 11 events with a background of $$1.07\pm0.14$$ (syst.). The $$3.3\sigma$$ excess of events observed in the primary analysis disfavors $$0.1\pi < \delta_{CP} < 0.5\pi$$ in the inverted mass hierarchy at the 90% C.L.

Authors:
 [1]
  1. et al.
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States); 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:
1244432
Alternate Identifier(s):
OSTI ID: 1247250
Report Number(s):
FERMILAB-PUB-15-262-ND; arXiv:1601.05022
Journal ID: ISSN 0031-9007; PRLTAO; 1415951
Grant/Contract Number:  
AC02-07CH11359
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 116; Journal Issue: 15; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Adamson, P. First Measurement of Electron Neutrino Appearance in NOvA. United States: N. p., 2016. Web. doi:10.1103/PhysRevLett.116.151806.
Adamson, P. First Measurement of Electron Neutrino Appearance in NOvA. United States. doi:10.1103/PhysRevLett.116.151806.
Adamson, P. Sat . "First Measurement of Electron Neutrino Appearance in NOvA". United States. doi:10.1103/PhysRevLett.116.151806. https://www.osti.gov/servlets/purl/1244432.
@article{osti_1244432,
title = {First Measurement of Electron Neutrino Appearance in NOvA},
author = {Adamson, P.},
abstractNote = {We report results from the first search for $\nu_\mu\to\nu_e$ transitions by the NOvA experiment. In an exposure equivalent to $2.74\times10^{20}$ protons-on-target in the upgraded NuMI beam at Fermilab, we observe 6 events in the Far Detector, compared to a background expectation of $0.99\pm0.11$ (syst.) events based on the Near Detector measurement. A secondary analysis observes 11 events with a background of $1.07\pm0.14$ (syst.). The $3.3\sigma$ excess of events observed in the primary analysis disfavors $0.1\pi < \delta_{CP} < 0.5\pi$ in the inverted mass hierarchy at the 90% C.L.},
doi = {10.1103/PhysRevLett.116.151806},
journal = {Physical Review Letters},
number = 15,
volume = 116,
place = {United States},
year = {2016},
month = {4}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 52 works
Citation information provided by
Web of Science

Save / Share:

Works referenced in this record:

Extensions and explorations of the elastic arms algorithm
journal, September 1993


Neutrino-nucleus quasi-elastic and 2p2h interactions up to 10 GeV
journal, December 2013


Study of quasielastic scattering using charged-current ν μ -iron interactions in the MINOS near detector
journal, January 2015


A possibilistic approach to clustering
journal, May 1993

  • Krishnapuram, R.; Keller, J. M.
  • IEEE Transactions on Fuzzy Systems, Vol. 1, Issue 2
  • DOI: 10.1109/91.227387

Event Reconstruction Techniques in NOvA
journal, December 2015


Matter effects on three-neutrino oscillations
journal, December 1980


The FLUKA Code: Developments and Challenges for High Energy and Medical Applications
journal, June 2014


Track finding with deformable templates — the elastic arms approach
journal, August 1992

  • Ohlsson, Mattias; Peterson, Carsten; Yuille, Alan L.
  • Computer Physics Communications, Vol. 71, Issue 1-2
  • DOI: 10.1016/0010-4655(92)90074-9

Measurement of Muon Neutrino Quasielastic Scattering on a Hydrocarbon Target at E ν 3.5 GeV
journal, July 2013


Status of three-neutrino oscillation parameters, circa 2013
journal, May 2014


Track fitting with ambiguities and noise: A study of elastic tracking and nonlinear filters
journal, August 1999


Review of Particle Physics
journal, August 2014


New Measurement of Antineutrino Oscillation with the Full Detector Configuration at Daya Bay
journal, September 2015


Measurement of the ν μ charged current quasielastic cross section on carbon with the T2K on-axis neutrino beam
journal, June 2015


Liquid scintillator production for the NOvA experiment
journal, November 2015

  • Mufson, S.; Baugh, B.; Bower, C.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 799
  • DOI: 10.1016/j.nima.2015.07.026

Unified approach for nucleon knock-out and coherent and incoherent pion production in neutrino interactions with nuclei
journal, December 2009


Unsupervised possibilistic clustering
journal, January 2006


Identification of Nuclear Effects in Neutrino-Carbon Interactions at Low Three-Momentum Transfer
journal, February 2016


First measurement of the muon neutrino charged current quasielastic double differential cross section
journal, May 2010


Neutrino and antineutrino quasielastic interactions with nuclei
journal, April 2010


The NuMI neutrino beam
journal, January 2016

  • Adamson, P.; Anderson, K.; Andrews, M.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 806
  • DOI: 10.1016/j.nima.2015.08.063

The GENIE neutrino Monte Carlo generator
journal, February 2010

  • Andreopoulos, C.; Bell, A.; Bhattacharya, D.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 614, Issue 1
  • DOI: 10.1016/j.nima.2009.12.009

Neutrino oscillations in matter
journal, May 1978


Geant4 developments and applications
journal, February 2006

  • Allison, J.; Amako, K.; Apostolakis, J.
  • IEEE Transactions on Nuclear Science, Vol. 53, Issue 1
  • DOI: 10.1109/TNS.2006.869826

Library Event Matching event classification algorithm for electron neutrino interactions in the NOνA detectors
journal, April 2015

  • Backhouse, C.; Patterson, R. B.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 778
  • DOI: 10.1016/j.nima.2015.01.017

Golden measurements at a neutrino factory
journal, July 2000


The magnetized steel and scintillator calorimeters of the MINOS experiment
journal, November 2008

  • Michael, D. G.; Adamson, P.; Alexopoulos, T.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 596, Issue 2
  • DOI: 10.1016/j.nima.2008.08.003

Erratum to “Golden measurements at a neutrino factory”
journal, January 2001


The NO v A simulation chain
journal, December 2015


The NOνA Neutrino Calorimeter
journal, December 2012


Real-time line detection through an improved Hough transform voting scheme
journal, January 2008


Efficient Numerical Diagonalization of Hermitian 3 × 3 Matrices
journal, March 2008


Scintillations from Organic Crystals: Specific Fluorescence and Relative Response to Different Radiations
journal, October 1951


Updated fit to three neutrino mixing: status of leptonic CP violation
journal, November 2014

  • Gonzalez-Garcia, M. C.; Maltoni, Michele; Schwetz, Thomas
  • Journal of High Energy Physics, Vol. 2014, Issue 11
  • DOI: 10.1007/JHEP11(2014)052

Observation of Electron Neutrino Appearance in a Muon Neutrino Beam
journal, February 2014


A large liquid scintillator detector for a long baseline neutrino oscillation experiment
journal, May 2001

  • Border, P.; Cushman, P.; Heller, K.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 463, Issue 1-2
  • DOI: 10.1016/S0168-9002(01)00525-3

Geant4—a simulation toolkit
journal, July 2003

  • Agostinelli, S.; Allison, J.; Amako, K.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 506, Issue 3
  • DOI: 10.1016/S0168-9002(03)01368-8

Electron Neutrino and Antineutrino Appearance in the Full MINOS Data Sample
journal, April 2013


Elastic tracking and neural network algorithms for complex pattern recognition
journal, July 1991


Improved measurements of the neutrino mixing angle θ 13 with the Double Chooz detector
journal, October 2014

  • Abe, Y.; dos Anjos, J. C.; Barriere, J. C.
  • Journal of High Energy Physics, Vol. 2014, Issue 10
  • DOI: 10.1007/JHEP10(2014)086

The NO ν A Far Detector Data Acquisition System
journal, June 2014


Measurement of the quasielastic axial vector mass in neutrino interactions on oxygen
journal, September 2006


Unified approach to the classical statistical analysis of small signals
journal, April 1998


    Works referencing / citing this record:

    Lepton Number Violation: Seesaw Models and Their Collider Tests
    journal, May 2018


    Status and future of nuclear matrix elements for neutrinoless double-beta decay: a review
    journal, March 2017


    Phenomenological implications of two simple modifications to Tri-Bimaximal mixing
    journal, August 2017


    Status and future of nuclear matrix elements for neutrinoless double-beta decay: a review
    journal, March 2017


    Phenomenological implications of two simple modifications to Tri-Bimaximal mixing
    journal, August 2017


    Lepton Number Violation: Seesaw Models and Their Collider Tests
    journal, May 2018