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Title: Impact of cross section uncertainties on NOvA oscillation analyses

Abstract

The NOvA experiment is an off-axis long-baseline neutrino oscillation experiment measuring $$\nu_{\mu}$$ disappearance and $$\nu_{e}$$ appearance in a $$\nu_{\mu}$$ beam originating at Fermilab. Oscillations are observed in the far detector relative to measurements made in the near detector, with a full simulation of the beam line and detectors being used to perform extrapolation between them. The neutrino simulation uses the GENIE event generator, which contains implementations of numerous theoretical neutrino interaction models applied to a variety of nuclear targets. However, recent data, recent reanalysis of extant data, and continued development of theoretical models have brought to light deficiencies in the default GENIE cross section model, which informs the predicted spectra used to infer oscillation parameters. We explore how uncertainties in this model, together with modifications to GENIE version 2.12.2 based on external information and NOvA Near Detector (ND) data, affect NOvA's oscillation parameter inferences. We also discuss how these uncertainties can be mitigated by judicious analysis design, including usage of the ND data.

Authors:
ORCiD logo [1]
  1. Tufts Univ., Medford, MA (United States)
Publication Date:
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:
1511671
Report Number(s):
arXiv:1812.05653; FERMILAB-CONF-18-705-E
Journal ID: ISSN 1824-8039; oai:inspirehep.net:1709171
Grant/Contract Number:  
AC02-07CH11359
Resource Type:
Accepted Manuscript
Journal Name:
PoS Proceedings of Science
Additional Journal Information:
Journal Volume: NuFACT2018; Conference: 20. International Workshop on Neutrinos (NuFact2018), Blacksburg, VA (United States), 13-18 Aug 2018; Journal ID: ISSN 1824-8039
Publisher:
SISSA
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Wolcott, Jeremy. Impact of cross section uncertainties on NOvA oscillation analyses. United States: N. p., 2019. Web. doi:10.22323/1.341.0098.
Wolcott, Jeremy. Impact of cross section uncertainties on NOvA oscillation analyses. United States. doi:10.22323/1.341.0098.
Wolcott, Jeremy. Wed . "Impact of cross section uncertainties on NOvA oscillation analyses". United States. doi:10.22323/1.341.0098. https://www.osti.gov/servlets/purl/1511671.
@article{osti_1511671,
title = {Impact of cross section uncertainties on NOvA oscillation analyses},
author = {Wolcott, Jeremy},
abstractNote = {The NOvA experiment is an off-axis long-baseline neutrino oscillation experiment measuring $\nu_{\mu}$ disappearance and $\nu_{e}$ appearance in a $\nu_{\mu}$ beam originating at Fermilab. Oscillations are observed in the far detector relative to measurements made in the near detector, with a full simulation of the beam line and detectors being used to perform extrapolation between them. The neutrino simulation uses the GENIE event generator, which contains implementations of numerous theoretical neutrino interaction models applied to a variety of nuclear targets. However, recent data, recent reanalysis of extant data, and continued development of theoretical models have brought to light deficiencies in the default GENIE cross section model, which informs the predicted spectra used to infer oscillation parameters. We explore how uncertainties in this model, together with modifications to GENIE version 2.12.2 based on external information and NOvA Near Detector (ND) data, affect NOvA's oscillation parameter inferences. We also discuss how these uncertainties can be mitigated by judicious analysis design, including usage of the ND data.},
doi = {10.22323/1.341.0098},
journal = {PoS Proceedings of Science},
number = ,
volume = NuFACT2018,
place = {United States},
year = {2019},
month = {10}
}

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