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Title: First neutrino oscillation measurements in NOvA

In this study, the NOvA experiment uses the Fermilab NuMI neutrino beam and a newly constructed 14 kt detector to address several open questions in neutrino oscillations including the neutrino mass hierarchy, the precise value of the angle θ23, and the CP-violating phase δCP. The experiment has been running since 2014 and has recently released its first results from an equivalent exposure of 2.74 × 1020 protons-on-target equal to 8% of the eventual data set. Measurements of νμ → νμ oscillations find Δm232 = (2.52+0.2–0.18) × 10-3 eV2 and 0.38 < sin2θ23 < 0.65 for the normal neutrino mass hierarchy. The experiment has observed νμ → νe oscillations at 3.3 σ C.L. in this early data and disfavors the inverted neutrino mass hierarchy in the range 0.1π < δCP < 0.5π at the 90% C.L.
Authors:
 [1]
  1. Indiana Univ., Bloomington, IN (United States)
Publication Date:
Grant/Contract Number:
AC02-07CH11359
Type:
Published Article
Journal Name:
Nuclear Physics. B
Additional Journal Information:
Journal Volume: 908; Journal Issue: C; Journal ID: ISSN 0550-3213
Publisher:
Elsevier
Research Org:
Indiana Univ., Bloomington, IN (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; detector
OSTI Identifier:
1250286
Alternate Identifier(s):
OSTI ID: 1285822