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Search for active-sterile neutrino mixing using neutral-current interactions in NOvA

Adamson, P. and Backhouse, C. and Bays, K. and Lozier, J. and Mualem, L. and Patterson, R. B. and Pershey, D. (2017) Search for active-sterile neutrino mixing using neutral-current interactions in NOvA. Physical Review D, 96 (7). Art. No. 072006. ISSN 2470-0010.

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We report results from the first search for sterile neutrinos mixing with active neutrinos through a reduction in the rate of neutral-current interactions over a baseline of 810 km between the NOvA detectors. Analyzing a 14-kton detector equivalent exposure of 6.05×10^(20) protons-on-target in the NuMI beam at Fermilab, we observe 95 neutral-current candidates at the Far Detector compared with 83.5 ± 9.7(stat) ± 9.4(syst) events predicted assuming mixing only occurs between active neutrino species. No evidence for ν_μ→ν_s transitions is found. Interpreting these results within a 3+1 model, we place constraints on the mixing angles θ_(24) < 20.8° and θ_(34_ < 31.2° at the 90% C.L. for 0.05  eV^2 ≤ Δm^2_(41) ≤ 0.5  eV2, the range of mass splittings that produce no significant oscillations over the Near Detector baseline.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Mualem, L.0000-0003-3716-5100
Patterson, R. B.0000-0002-5787-9517
Additional Information:© 2017 American Physical Society. Received 16 June 2017; published 30 October 2017. The NOvA collaboration uses the resources of the Fermi National Accelerator Laboratory (Fermilab), a U.S. Department of Energy, Office of Science, HEP User Facility. Fermilab is managed by Fermi Research Alliance, LLC (FRA), acting under Contract No. DE-AC02-07CH11359. This research was supported by the U.S. Department of Energy; the U.S. National Science Foundation; the Department of Science and Technology, India; the European Research Council; the MSMT CR, GA UK, Czech Republic; the RAS, RMES, and RFBR, Russia; CNPq and FAPEG, Brazil; and the State and University of Minnesota. We are grateful for the contributions of the staff at Fermilab and the NOvA Far Detector Laboratory.
Funding AgencyGrant Number
Department of Energy (DOE)DE-AC02-07CH11359
Department of Science and Technology (India)UNSPECIFIED
European Research Council (ERC)UNSPECIFIED
Ministry of Education, Youth and Sports (Czech Republic)UNSPECIFIED
Russian Academy of SciencesUNSPECIFIED
Ministry of Education and Science (Russian Federation)UNSPECIFIED
Russian Foundation for Basic ResearchUNSPECIFIED
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)UNSPECIFIED
Fundação de Amparo à Pesquisa do Estado de Goiás (FAPEG)UNSPECIFIED
State of MinnesotaUNSPECIFIED
University of MinnesotaUNSPECIFIED
Issue or Number:7
Record Number:CaltechAUTHORS:20171031-111855130
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:82803
Deposited By: Tony Diaz
Deposited On:31 Oct 2017 19:41
Last Modified:11 Nov 2020 23:16

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