Journal
PHYSICAL REVIEW LETTERS
Volume 116, Issue 15, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.116.151806
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Funding
- U.S. Department of Energy
- U.S. National Science Foundation
- Department of Science and Technology, India
- European Research Council
- MSMT CR, Czech Republic
- RAS, Russia
- RMES, Russia
- RFBR, Russia
- CNPq, Brazil
- FAPEG, Brazil
- State and University of Minnesota
- U.S. DOE [De-AC02-07CH11359]
- STFC [ST/N000404/1, ST/M000028/1, ST/N000447/1, ST/N000307/1] Funding Source: UKRI
- Direct For Mathematical & Physical Scien [1306944] Funding Source: National Science Foundation
- Direct For Mathematical & Physical Scien
- Division Of Physics [1506309, 0955456, 1205884] Funding Source: National Science Foundation
- Direct For Mathematical & Physical Scien
- Division Of Physics [1410972] Funding Source: National Science Foundation
- Division Of Physics [1306944] Funding Source: National Science Foundation
- Science and Technology Facilities Council [ST/N000307/1, ST/K001329/1 nEDM, ST/M000028/1, ST/N000447/1, ST/N000404/1] Funding Source: researchfish
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We report results from the first search for nu(mu) -> nu(e) transitions by the NOvA experiment. In an exposure equivalent to 2.74 x 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 3.3 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.
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