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First Measurement of Electron Neutrino Appearance in NOvA.
- Source :
-
Physical review letters [Phys Rev Lett] 2016 Apr 15; Vol. 116 (15), pp. 151806. Date of Electronic Publication: 2016 Apr 13. - Publication Year :
- 2016
-
Abstract
- We report results from the first search for ν&#95;{μ}→ν&#95;{e} transitions by the NOvA experiment. In an exposure equivalent to 2.74×10^{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±0.11(syst) events based on the Near Detector measurement. A secondary analysis observes 11 events with a background of 1.07±0.14(syst). The 3.3σ excess of events observed in the primary analysis disfavors 0.1π<δ&#95;{CP}<0.5π in the inverted mass hierarchy at the 90% C.L.
Details
- Language :
- English
- ISSN :
- 1079-7114
- Volume :
- 116
- Issue :
- 15
- Database :
- MEDLINE
- Journal :
- Physical review letters
- Publication Type :
- Academic Journal
- Accession number :
- 27127961
- Full Text :
- https://doi.org/10.1103/PhysRevLett.116.151806