# New constraints on oscillation parameters from {nu}e appearance and {nu}{mu} disappearance in the NOvA experiment

## Abstract

We present updated results from the NOvA experiment for v(mu) -> v(mu) and v(mu) -> v(e) oscillations from an exposure of 8.85 x 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 v(mu) disappearance and v(e) appearance gives the best-fit point as normal mass hierarchy, Delta m(32)(2) = 2.44 x 10(-3) eV(2)/c(4), sin(2) theta(23) = 0.56, and delta(CP) = 1.21 pi. The 68.3% confidence intervals in the normal mass hierarchy are Delta m(32)(2) is an element of[2.37, 2.52] x 10(-3) eV(2)/c(4) , sin(2) theta(23) is an element of [0.43; 0.51] boolean OR [0.52; 0.60], and delta(CP) is an element of [0, 0.21 pi] boolean OR [0.91 pi, 2 pi]. The inverted mass hierarchy is disfavored at the 95% confidence level for all choices of the other oscillation parameters.

- Authors:

- Publication Date:

- Research Org.:
- Argonne National Lab. (ANL), Argonne, IL (United States)

- Sponsoring Org.:
- USDOE Office of Science - Office of High Energy Physics; National Science Foundation (NSF); India Department of Science and Technology

- OSTI Identifier:
- 1577436

- DOE Contract Number:
- AC02-06CH11357

- Resource Type:
- Journal Article

- Journal Name:
- Physical Review D

- Additional Journal Information:
- Journal Volume: 98; Journal Issue: 3

- Country of Publication:
- United States

- Language:
- English

### Citation Formats

```
Acero, M. A., Adamson, P, Aliaga, L., Alion, T., Allakhverdian, V., Anfimov, N., Antoshkin, A., Arrieta-Diaz, Enrique, Aurisano, A., Back, A., Dharmapalan, R., Djurcic, Z., Goodman, M. C., Magill, S., and Talaga, R. L.
```*New constraints on oscillation parameters from {nu}e appearance and {nu}{mu} disappearance in the NOvA experiment*. United States: N. p., 2018.
Web. doi:10.1103/PhysRevD.98.032012.

```
Acero, M. A., Adamson, P, Aliaga, L., Alion, T., Allakhverdian, V., Anfimov, N., Antoshkin, A., Arrieta-Diaz, Enrique, Aurisano, A., Back, A., Dharmapalan, R., Djurcic, Z., Goodman, M. C., Magill, S., & Talaga, R. L.
```*New constraints on oscillation parameters from {nu}e appearance and {nu}{mu} disappearance in the NOvA experiment*. United States. doi:10.1103/PhysRevD.98.032012.

```
Acero, M. A., Adamson, P, Aliaga, L., Alion, T., Allakhverdian, V., Anfimov, N., Antoshkin, A., Arrieta-Diaz, Enrique, Aurisano, A., Back, A., Dharmapalan, R., Djurcic, Z., Goodman, M. C., Magill, S., and Talaga, R. L. Fri .
"New constraints on oscillation parameters from {nu}e appearance and {nu}{mu} disappearance in the NOvA experiment". United States. doi:10.1103/PhysRevD.98.032012.
```

```
@article{osti_1577436,
```

title = {New constraints on oscillation parameters from {nu}e appearance and {nu}{mu} disappearance in the NOvA experiment},

author = {Acero, M. A. and Adamson, P and Aliaga, L. and Alion, T. and Allakhverdian, V. and Anfimov, N. and Antoshkin, A. and Arrieta-Diaz, Enrique and Aurisano, A. and Back, A. and Dharmapalan, R. and Djurcic, Z. and Goodman, M. C. and Magill, S. and Talaga, R. L.},

abstractNote = {We present updated results from the NOvA experiment for v(mu) -> v(mu) and v(mu) -> v(e) oscillations from an exposure of 8.85 x 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 v(mu) disappearance and v(e) appearance gives the best-fit point as normal mass hierarchy, Delta m(32)(2) = 2.44 x 10(-3) eV(2)/c(4), sin(2) theta(23) = 0.56, and delta(CP) = 1.21 pi. The 68.3% confidence intervals in the normal mass hierarchy are Delta m(32)(2) is an element of[2.37, 2.52] x 10(-3) eV(2)/c(4) , sin(2) theta(23) is an element of [0.43; 0.51] boolean OR [0.52; 0.60], and delta(CP) is an element of [0, 0.21 pi] boolean OR [0.91 pi, 2 pi]. The inverted mass hierarchy is disfavored at the 95% confidence level for all choices of the other oscillation parameters.},

doi = {10.1103/PhysRevD.98.032012},

journal = {Physical Review D},

number = 3,

volume = 98,

place = {United States},

year = {2018},

month = {8}

}

Works referenced in this record:

##
Discrete flavor symmetries and models of neutrino mixing

journal, September 2010

- Altarelli, Guido; Feruglio, Ferruccio
- Reviews of Modern Physics, Vol. 82, Issue 3

##
Models of neutrino masses and mixings

journal, January 2004

- Altarelli, Guido; Feruglio, Ferruccio
- New Journal of Physics, Vol. 6

##
Majorana neutrinos, neutrino mass spectrum, and the $|\u27e8m\u27e9|\sim {10}^{-3}\text{\hspace{0.17em}}\text{\hspace{0.17em}}\mathrm{eV}$ frontier in neutrinoless double beta decay

journal, June 2008

- Pascoli, S.; Petcov, S. T.
- Physical Review D, Vol. 77, Issue 11

##
Constraints on Oscillation Parameters from ${\nu}_{e}$ Appearance and ${\nu}_{\mu}$ Disappearance in NOvA

journal, June 2017

- Adamson, P.; Aliaga, L.; Ambrose, D.
- Physical Review Letters, Vol. 118, Issue 23

##
Combined Analysis of ${\nu}_{\mu}$ Disappearance and ${\nu}_{\mu}\to {\nu}_{e}$ Appearance in MINOS Using Accelerator and Atmospheric Neutrinos

journal, May 2014

- Adamson, P.; Anghel, I.; Aurisano, A.
- Physical Review Letters, Vol. 112, Issue 19

##
Measurement of neutrino and antineutrino oscillations by the T2K experiment including a new additional sample of ${\nu}_{e}$ interactions at the far detector

journal, November 2017

- Abe, K.; Amey, J.; Andreopoulos, C.
- Physical Review D, Vol. 96, Issue 9

##
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

##
PVC extrusion development and production for the NOvA neutrino experiment

journal, July 2017

- Talaga, R. L.; Grudzinski, J. J.; Phan-Budd, S.
- Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 861

##
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

##
Neutrino flux predictions for the NuMI beam

journal, November 2016

- Aliaga, L.; Kordosky, M.; Golan, T.
- Physical Review D, Vol. 94, Issue 9

##
Publisher’s Note: Neutrino flux predictions for the NuMI beam [Phys. Rev. D **94** , 092005 (2016)]

journal, February 2017

- Aliaga, L.; Kordosky, M.; Golan, T.
- Physical Review D, Vol. 95, Issue 3

##
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

##
Measurement of the Neutrino Mixing Angle ${\theta}_{23}$ in NOvA

journal, April 2017

- Adamson, P.; Aliaga, L.; Ambrose, D.
- Physical Review Letters, Vol. 118, Issue 15

##
Search for active-sterile neutrino mixing using neutral-current interactions in NOvA

journal, October 2017

- Adamson, P.; Aliaga, L.; Ambrose, D.
- Physical Review D, Vol. 96, Issue 7

##
Inclusive quasielastic charged-current neutrino-nucleus reactions

journal, November 2004

- Nieves, J.; Amaro, J. E.; Valverde, M.
- Physical Review C, Vol. 70, Issue 5

##
Erratum: Inclusive quasielastic charged-current neutrino-nucleus reactions [Phys. Rev. C 70, 055503 (2004)]

journal, July 2005

- Nieves, J.; Amaro, J. E.; Valverde, M.
- Physical Review C, Vol. 72, Issue 1

##
Constraining the GENIE model of neutrino-induced single pion production using reanalyzed bubble chamber data

journal, August 2016

- Rodrigues, Philip; Wilkinson, Callum; McFarland, Kevin
- The European Physical Journal C, Vol. 76, Issue 8

##
A convolutional neural network neutrino event classifier

journal, September 2016

- Aurisano, A.; Radovic, A.; Rocco, D.
- Journal of Instrumentation, Vol. 11, Issue 09

##
Learning representations by back-propagating errors

journal, October 1986

- Rumelhart, David E.; Hinton, Geoffrey E.; Williams, Ronald J.
- Nature, Vol. 323, Issue 6088

##
A New Approach to Linear Filtering and Prediction Problems

journal, March 1960

- Kalman, R. E.
- Journal of Basic Engineering, Vol. 82, Issue 1

##
An Introduction to Kernel and Nearest-Neighbor Nonparametric Regression

journal, August 1992

- Altman, N. S.
- The American Statistician, Vol. 46, Issue 3

##
The Convergence of a Class of Double-rank Minimization Algorithms 1. General Considerations

journal, January 1970

- Broyden, C. G.
- IMA Journal of Applied Mathematics, Vol. 6, Issue 1

##
A new approach to variable metric algorithms

journal, March 1970

- Fletcher, R.
- The Computer Journal, Vol. 13, Issue 3

##
A family of variable-metric methods derived by variational means

journal, January 1970

- Goldfarb, Donald
- Mathematics of Computation, Vol. 24, Issue 109

##
Conditioning of quasi-Newton methods for function minimization

journal, September 1970

- Shanno, D. F.
- Mathematics of Computation, Vol. 24, Issue 111

##
Real-time line detection through an improved Hough transform voting scheme

journal, January 2008

- Fernandes, Leandro A. F.; Oliveira, Manuel M.
- Pattern Recognition, Vol. 41, Issue 1

##
Elastic tracking and neural network algorithms for complex pattern recognition

journal, July 1991

- Gyulassy, Miklos; Harlander, Magnus
- Computer Physics Communications, Vol. 66, Issue 1

##
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

##
Extensions and explorations of the elastic arms algorithm

journal, September 1993

- Ohlsson, Mattias
- Computer Physics Communications, Vol. 77, Issue 1

##
Track fitting with ambiguities and noise: A study of elastic tracking and nonlinear filters

journal, August 1999

- Frühwirth, R.; Strandlie, A.
- Computer Physics Communications, Vol. 120, Issue 2-3

##
A possibilistic approach to clustering

journal, May 1993

- Krishnapuram, R.; Keller, J. M.
- IEEE Transactions on Fuzzy Systems, Vol. 1, Issue 2

##
Unsupervised possibilistic clustering

journal, January 2006

- Yang, Miin-Shen; Wu, Kuo-Lung
- Pattern Recognition, Vol. 39, Issue 1

##
Theoretical uncertainties on quasielastic charged-current neutrino–nucleus cross sections

journal, July 2006

- Valverde, M.; Amaro, J. E.; Nieves, J.
- Physics Letters B, Vol. 638, Issue 4

##
Neutrino-nucleus quasi-elastic and 2p2h interactions up to 10 GeV

journal, December 2013

- Gran, R.; Nieves, J.; Sanchez, F.
- Physical Review D, Vol. 88, Issue 11

##
Unified approach for nucleon knock-out and coherent and incoherent pion production in neutrino interactions with nuclei

journal, December 2009

- Martini, M.; Ericson, M.; Chanfray, G.
- Physical Review C, Vol. 80, Issue 6

##
Charged-current neutrino-nucleus reactions within the superscaling meson-exchange current approach

journal, November 2016

- Megias, G. D.; Amaro, J. E.; Barbaro, M. B.
- Physical Review D, Vol. 94, Issue 9

##
Neutrino–nucleus cross sections for oscillation experiments

journal, December 2017

- Katori, Teppei; Martini, Marco
- Journal of Physics G: Nuclear and Particle Physics, Vol. 45, Issue 1

##
Vector and axial nucleon form factors: A duality constrained parameterization

journal, December 2007

- Bodek, A.; Avvakumov, S.; Bradford, R.
- The European Physical Journal C, Vol. 53, Issue 3

##
Deuterium target data for precision neutrino-nucleus cross sections

journal, June 2016

- Meyer, Aaron S.; Betancourt, Minerba; Gran, Richard
- Physical Review D, Vol. 93, Issue 11

##
Differences in quasielastic cross sections of muon and electron neutrinos

journal, September 2012

- Day, Melanie; McFarland, Kevin S.
- Physical Review D, Vol. 86, Issue 5

##
The Nature of the Saturation Effect of Fluorescent Scintillators

journal, September 1952

- Chou, C. N.
- Physical Review, Vol. 87, Issue 5

##
The Monte Carlo simulation of the Borexino detector

journal, January 2018

- Agostini, M.; Altenmüller, K.; Appel, S.
- Astroparticle Physics, Vol. 97

##
Unified approach to the classical statistical analysis of small signals

journal, April 1998

- Feldman, Gary J.; Cousins, Robert D.
- Physical Review D, Vol. 57, Issue 7

##
Measurement of Atmospheric Neutrino Oscillations at 6–56 GeV with IceCube DeepCore

journal, February 2018

- Aartsen, M. G.; Ackermann, M.; Adams, J.
- Physical Review Letters, Vol. 120, Issue 7

##
Atmospheric neutrino oscillation analysis with external constraints in Super-Kamiokande I-IV

journal, April 2018

- Abe, K.; Bronner, C.; Haga, Y.
- Physical Review D, Vol. 97, Issue 7

##
P Values Maximized Over a Confidence Set for the Nuisance Parameter

journal, September 1994

- Berger, Roger L.; Boos, Dennis D.
- Journal of the American Statistical Association, Vol. 89, Issue 427