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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
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: |
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| 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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