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



Abe, K, Adam, J, Aihara, H, Akiri, T, Andreopoulos, C ORCID: 0000-0003-2020-8215, Aoki, S, Ariga, A, Ariga, T, Assylbekov, S, Autiero, D
et al (show 332 more authors) (2014) Measurement of the intrinsic electron neutrino component in the T2K neutrino beam with the ND280 detector. PHYSICAL REVIEW D, 89 (9). 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: Article
Additional Information: 19 pages, 19 figures
Uncontrolled Keywords: hep-ex, hep-ex
Depositing User: Symplectic Admin
Date Deposited: 03 May 2017 09:13
Last Modified: 24 Jan 2023 03:55
DOI: 10.1103/PhysRevD.89.092003
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3007218