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Measurement of neutrino oscillation parameters from muon neutrino disappearance with an off-axis beam

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T2K Collaboration (Including: Barker, Gary John, Boyd, Steve B., Dennis, Stephen R., Furmanski, Andrew P., Hadley, David R., Haigh, Martin David, Lister, Callum and Litchfield, Reuban P.). (2013) Measurement of neutrino oscillation parameters from muon neutrino disappearance with an off-axis beam. Physical Review Letters, Volume 111 (Number 21). Article number 211803 . doi:10.1103/PhysRevLett.111.211803

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Official URL: http://link.aps.org/doi/10.1103/PhysRevLett.111.21...

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Abstract

The T2K Collaboration reports a precision measurement of muon neutrino disappearance with an off-axis neutrino beam with a peak energy of 0.6 GeV. Near detector measurements are used to constrain the neutrino flux and cross section parameters. The Super-Kamiokande far detector, which is 295 km downstream of the neutrino production target, collected data corresponding to 3.01×1020 protons on target. In the absence of neutrino oscillations, 205±17 (syst) events are expected to be detected while only 58 muon neutrino event candidates are observed. A fit to the neutrino rate and energy spectrum, assuming three neutrino flavors and normal mass hierarchy yields a best-fit mixing angle sin2(θ23)=0.514±0.082 and mass splitting |Δm232|=2.44+0.17−0.15×10−3  eV2/c4. Our result corresponds to the maximal oscillation disappearance probability.

Item Type: Journal Article
Subjects: Q Science > QC Physics
Divisions: Faculty of Science > Physics
Library of Congress Subject Headings (LCSH): Neutrinos, Oscillations, Muons
Journal or Publication Title: Physical Review Letters
Publisher: American Physical Society
ISSN: 0031-9007
Official Date: 2013
Dates:
DateEvent
2013Published
Volume: Volume 111
Number: Number 21
Number of Pages: 7
Article Number: Article number 211803
DOI: 10.1103/PhysRevLett.111.211803
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
Funder: Japan. Monbushō, Natural Sciences and Engineering Research Council of Canada (NSERC), National Research Council of Canada (NRC), Canada Foundation for Innovation (CFI), France. Commissariat à l'énergie atomique (CEA), Centre national de la recherche scientifique (France) (CNRS), Institut national de physique nucléaire et de physique des particules (IN2P3), Deutsche Forschungsgemeinschaft (DFG), Istituto nazionale di fisica nucleare (INFN), Poland. Ministerstwo Nauki i Szkolnictwa Wyższego [Ministry of Science and Higher Education] (MNiSW), Rossiĭskai͡a akademii͡a nauk [Russian Academy of Sciences] (RAS), Rossiĭskiĭ fond fundamentalʹnykh issledovaniĭ [Russian Foundation for Basic Research] (RFBR), Russia (Federation). Ministerstvo obrazovanii︠a︡ i nauki [Ministry of Education and Science], Korea (South). Kyoyuk Kwahak Kisulbu [Ministry of Education, Science and Technology] (MEST), National Research Foundation of Korea (NRF), Spain. Ministerio de Ciencia e Innovación (MICINN), Centro Nacional de Física de Partículas, Astropartículas y Nuclear (CPAN), Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung [Swiss National Science Foundation] (SNSF), Switzerland. State Secretariat for Education and Research (SER), Science and Technology Facilities Council (Great Britain) (STFC), United States. Dept. of Energy, Seventh Framework Programme (European Commission) (FP7), Nihon Gakujutsu Shinkōkai [Japan Society for the Promotion of Science] (JSPS), Royal Society (Great Britain)

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