Impact of cross section uncertainties on NOvA oscillation analyses

Journal Article · 30 October 2019 · PoS Proceedings of Science

DOI: https://doi.org/10.22323/1.341.0098 · OSTI ID:1511671

Wolcott, Jeremy  ^[1]

---

1. Tufts Univ., Medford, MA (United States)

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.

• Research Organization: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
• Contributing Organization: NOvA Collaboration
• Grant/Contract Number: AC02-07CH11359
• OSTI ID: 1511671
• Report Number(s): FERMILAB-CONF--18-705-E; arXiv:1812.05653; oai:inspirehep.net:1709171
• Journal Information: PoS Proceedings of Science, Journal Name: PoS Proceedings of Science Vol. NuFACT2018; ISSN 1824-8039
• Publisher: SISSACopyright Statement
• Country of Publication: United States
• Language: English