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  • PhysRevD.91.112010

    Rights statement: c2015 Published by the American Physical Society

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Measurement of the electron neutrino charged-current interaction rate on water with the T2K ND280 pi-zero detector

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Article number112010
<mark>Journal publication date</mark>19/06/2015
<mark>Journal</mark>Physical Review D
Issue number11
Volume91
Number of pages11
Publication StatusPublished
<mark>Original language</mark>English

Abstract

This paper presents a measurement of the charged current interaction rate of the electron neutrino beam component of the beam above $1.5$~GeV using the large fiducial mass of the T2K $\pi^0$ detector. The predominant poriton of the $\nu_e$ flux ($\sim$85 %) at these energies comes from kaon decays. The measured ratio of the observed beam interaction rate to the predicted rate in the detector with water targets filled is 0.89 $\pm$ 0.08 (stat.) $\pm$ 0.11 (sys.), and with the water targets emptied is 0.90 $\pm$ 0.09 (stat.) $\pm$ 0.13 (sys.). The ratio obtained for the interactions on water only from an event subtraction method is 0.87 $\pm$ 0.33 (stat.) $\pm$ 0.21 (sys.). This is the first measurement of the interaction rate of electron neutrinos on water, which is particularly of interest to experiments with water Cherenkov detectors.

Bibliographic note

11 pages, 6 figures, after PRD referee comments addressed c2015 Published by the American Physical Society