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Title: Improved Search for a Light Sterile Neutrino with the Full Configuration of the Daya Bay Experiment

Here this Letter reports an improved search for light sterile neutrino mixing in the electron antineutrino disappearance channel with the full configuration of the Daya Bay Reactor Neutrino Experiment. With an additional 404 days of data collected in eight antineutrino detectors, this search benefits from 3.6 times the statistics available to the previous publication, as well as from improvements in energy calibration and background reduction. A relative comparison of the rate and energy spectrum of reactor antineutrinos in the three experimental halls yields no evidence of sterile neutrino mixing in the 2 x 10-4 $$\lesssim$$| Δ$$2\atop{41}$$| $$\lesssim$$ 0.3 eV2 . The resulting limits on sin2 $$2\theta$$14 are improved by approximately a factor of two over previous results and constitute the most stringent constraints to date in the |Δm$$2\atop{41}$$| $$\lesssim$$ 0.2 eV2 region.
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Publication Date:
Report Number(s):
BNL-113238-2016-JA
Journal ID: ISSN 0031-9007; PRLTAO; R&D Project: PO-022; KA2201020
Grant/Contract Number:
SC0012704
Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 117; Journal Issue: 15; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Orgs:
Daya Bay Collaboration
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; sterile; neutrino; mixing; reactor; Daya Bay
OSTI Identifier:
1338597
Alternate Identifier(s):
OSTI ID: 1328237