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Measurement of the intrinsic electron neutrino component in the T2K neutrino beam with the ND280 detector

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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, Larkin, Edward, Lister, Callum and Litchfield, Reuban P.). (2014) Measurement of the intrinsic electron neutrino component in the T2K neutrino beam with the ND280 detector. Physical Review D - Particles, Fields, Gravitation and Cosmology , Volume 89 (Number 9). Article number 092003. doi:10.1103/PhysRevLett.111.211803

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Official URL: http://dx.doi.org/10.1103/PhysRevD.89.092003

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Abstract

The T2K experiment has reported the first observation of the appearance of electron neutrinos in a muon neutrino beam. The main and irreducible background to the appearance signal comes from the presence in the neutrino beam of a small intrinsic component of electron neutrinos originating from muon and kaon decays. In T2K, this component is expected to represent 1.2% of the total neutrino flux. A measurement of this component using the near detector (ND280), located 280 m from the target, is presented. The charged current interactions of electron neutrinos are selected by combining the particle identification capabilities of both the time projection chambers and electromagnetic calorimeters of ND280. The measured ratio between the observed electron neutrino beam component and the prediction is 1.01±0.10 providing a direct confirmation of the neutrino fluxes and neutrino cross section modeling used for T2K neutrino oscillation analyses. Electron neutrinos coming from muons and kaons decay are also separately measured, resulting in a ratio with respect to the prediction of 0.68±0.30 and 1.10±0.14, respectively.

Item Type: Journal Article
Subjects: Q Science > QC Physics
Divisions: Faculty of Science > Physics
Library of Congress Subject Headings (LCSH):
Journal or Publication Title: Physical Review D - Particles, Fields, Gravitation and Cosmology
Publisher: American Physical Society
ISSN: 1550-7998
Official Date: 5 May 2014
Dates:
DateEvent
5 May 2014Published
11 March 2014Submitted
Volume: Volume 89
Number: Number 9
Article Number: Article number 092003
DOI: 10.1103/PhysRevLett.111.211803
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access

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