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

Ariga, Akitaka; Ariga, Tomoko; Ereditato, Antonio; Göldi, Damian; Hierholzer, Martin; Kreslo, Igor; Nirkko, Martti; Pistillo, Ciro; Redij, Asmita Ajit (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, D89(9), 092003. Melville, N.Y.: American Physical Society 10.1103/PhysRevD.89.092003

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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 (Original Article)

Division/Institute:

10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC)
08 Faculty of Science > Physics Institute > Laboratory for High Energy Physics (LHEP)

UniBE Contributor:

Ariga, Akitaka; Ariga, Tomoko; Ereditato, Antonio; Göldi, Damian; Hierholzer, Martin; Kreslo, Igor; Pistillo, Ciro and Redij, Asmita Ajit

Subjects:

500 Science > 530 Physics

ISSN:

1550-7998

Publisher:

American Physical Society

Language:

English

Submitter:

Jan Dirk Brinksma-Albrecht

Date Deposited:

04 Jun 2015 16:02

Last Modified:

10 Feb 2016 12:02

Publisher DOI:

10.1103/PhysRevD.89.092003

Additional Information:

Kollaboration - Es sind nur die Berner Autoren namentlich erwähnt

BORIS DOI:

10.7892/boris.68754

URI:

https://boris.unibe.ch/id/eprint/68754

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