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Search for electron antineutrino appearance in a long-baseline muon antineutrino beam

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T2K Collaboration (Including: Barker, Gary John, Boyd, Steve B., Chappell, A., Denner, P. F., Hadley, David R., Haigh, J. T., Knight, A., Valder, S. and Vinnings, S.). (2020) Search for electron antineutrino appearance in a long-baseline muon antineutrino beam. Physical Review Letters, 124 . 161802 . doi:10.1103/PhysRevLett.124.161802

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Official URL: https://doi.org/10.1103/PhysRevLett.124.161802

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Abstract

Electron antineutrino appearance is measured by the T2K experiment in an accelerator-produced antineutrino beam, using additional neutrino beam operation to constrain parameters of the Pontecorvo-Maki-Nakagawa-Sakata (PMNS) mixing matrix. T2K observes 15 candidate electron antineutrino events with a background expectation of 9.3 events. Including information from the kinematic distribution of observed events, the hypothesis of no electron antineutrino appearance is disfavored with a significance of 2.40σ and no discrepancy between data and PMNS predictions is found. A complementary analysis that introduces an additional free parameter which allows non-PMNS values of electron neutrino and antineutrino appearance also finds no discrepancy between data and PMNS predictions.

Item Type: Journal Article
Subjects: Q Science > QC Physics
Divisions: Faculty of Science > Physics
Library of Congress Subject Headings (LCSH): Antineutrinos, Oscillations, Neutron beams, Muons
Journal or Publication Title: Physical Review Letters
Publisher: American Physical Society
ISSN: 0031-9007
Official Date: 21 April 2020
Dates:
DateEvent
21 April 2020Published
25 March 2020Accepted
Volume: 124
Article Number: 161802
DOI: 10.1103/PhysRevLett.124.161802
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Open Access
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
UNSPECIFIED[STFC] Science and Technology Facilities Councilhttp://dx.doi.org/10.13039/501100000271
UNSPECIFIED[MEXT] Ministry of Education, Culture, Sports, Science and Technologyhttp://dx.doi.org/10.13039/501100001700
SAPPJ-2014-00031[NSERC] Natural Sciences and Engineering Research Council of Canadahttp://dx.doi.org/10.13039/501100000038
UNSPECIFIED[NRC] National Research Council Canadahttp://dx.doi.org/10.13039/501100000046
UNSPECIFIED[CFI] Canada Foundation for Innovationhttp://dx.doi.org/10.13039/501100000196
UNSPECIFIED[CEA] Commissariat à l'Énergie Atomique et aux Énergies Alternativeshttp://dx.doi.org/10.13039/501100006489
UNSPECIFIED[CNRS] Centre National de la Recherche Scientifiquehttp://dx.doi.org/10.13039/501100004794
UNSPECIFIEDInstitut National de Physique Nucléaire et de Physique des ParticulesUNSPECIFIED
UNSPECIFIED[DFG] Deutsche Forschungsgemeinschafthttp://dx.doi.org/10.13039/501100001659
UNSPECIFIED[INFN] Instituto Nazionale di Fisica Nuclearehttp://dx.doi.org/10.13039/501100004007
UNSPECIFIEDNarodowe Centrum Naukihttp://dx.doi.org/10.13039/501100004281
UNSPECIFIEDMinisterstwo Nauki i Szkolnictwa Wyższegohttp://dx.doi.org/10.13039/501100004569
1912-00325[RSF] Russian Science Foundationhttp://dx.doi.org/10.13039/501100006769
UNSPECIFIEDMinistry of Science and Higher Education of the Russian FederationUNSPECIFIED
UNSPECIFIED[MINECO] Ministerio de Economía y Competitividadhttp://dx.doi.org/10.13039/501100003329
UNSPECIFIED[ERDF] European Regional Development Fundhttp://dx.doi.org/10.13039/501100008530
UNSPECIFIED[SNSF] Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschunghttp://dx.doi.org/10.13039/501100001711
UNSPECIFIED[DOE] U.S. Department of Energyhttp://dx.doi.org/10.13039/100000015
UNSPECIFIEDSeventh Framework Programmehttp://dx.doi.org/10.13039/100011102
LCF/BQ/IN17/11620050'la Caixa' Foundationhttps://obrasociallacaixa.org/en/
713673 Horizon 2020 Framework Programmehttp://dx.doi.org/10.13039/100010661
RISEGA644294-JENNIFER 2020Horizon 2020 Framework Programmehttp://dx.doi.org/10.13039/100010661
UNSPECIFIED[JSPS] Japan Society for the Promotion of Sciencehttp://dx.doi.org/10.13039/501100001691
UNSPECIFIEDRoyal Societyhttp://dx.doi.org/10.13039/501100000288

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