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First measurement of electron neutrino appearance in NOvA

Abstract:
We report results from the first search for νμ → νe 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 < δCP > 0.5π in the inverted mass hierarchy at the 90% C.L.
Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1103/PhysRevLett.116.151806

Authors


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Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Particle Physics
Role:
Author
More by this author
Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Particle Physics
Role:
Author
More from this funder
Name:
U.S. Department of Energy
Grant:
De-AC02-07CH11359
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Name:
Brazilian National Council for Scientific and Technological Development
More from this funder
Name:
Fermi Research Alliance, LLC
More from this funder
Name:
Russian Foundation for Basic Research
Publisher:
American Physical Society
Journal:
Physical Review Letters More from this journal
Volume:
116
Issue:
15
Article number:
151806
Publication date:
2016-04-13
Acceptance date:
2016-02-25
DOI:
EISSN:
1079-7114
ISSN:
0031-9007
Pmid:
27127961
Language:
English
Pubs id:
pubs:617918
UUID:
uuid:c72a3b3b-c326-4d3a-9bf0-b6673b695ccf
Local pid:
pubs:617918
Source identifiers:
617918
Deposit date:
2016-10-13

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