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Title: First Measurement of Electron Neutrino Appearance in NOvA

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:
Report Number(s):
FERMILAB-PUB-15-262-ND; arXiv:1601.05022
Journal ID: ISSN 0031-9007; PRLTAO; 1415951
Grant/Contract Number:
AC02-07CH11359
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)
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 Orgs:
NOvA Collaboration
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
OSTI Identifier:
1244432
Alternate Identifier(s):
OSTI ID: 1247250

Adamson, P. First Measurement of Electron Neutrino Appearance in NOvA. United States: N. p., 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. 2016. "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}
}