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Measurement of the neutrino-oxygen neutral-current quasielastic cross section using atmospheric neutrinos at Super-Kamiokande

  • (Super-Kamiokande Collaboration)
  • Tsinghua University
  • University of Tokyo
  • Universidad Autónoma de Madrid
  • Boston University
  • University of British Columbia
  • Long Beach VA and University of California
  • University of California, Los Angeles
  • California State University, Dominguez Hills
  • Chonnam National University
  • Duke University
  • Ip Paris
  • Fukuoka Institute of Technology
  • Gifu University
  • Gwangju Institute of Science and Technology
  • University of Hawaii
  • Imperial College London
  • Politecnico di Bari
  • University of Naples Federico II
  • INFN
  • University of Rome
  • High Energy Accelerator Research Organization (KEK)
  • Kobe University
  • Kyoto University
  • University of Liverpool
  • Miyagi University of Education
  • Nagoya University
  • National Centre for Nuclear Research (NCBJ)
  • Stony Brook University
  • York College/The City University of New York
  • Okayama University
  • Osaka University
  • University of Oxford
  • CCLRC Rutherford Appleton Laboratory
  • Queen Mary University of London
  • University of Regina
  • TRIUMF
  • Seoul National University
  • The University of Sheffield
  • Shizuoka University of Welfare
  • Sungkyunkwan University
  • Tokai University
  • Tokyo Institute of Technology
  • Tokyo University of Science
  • University of Toronto
  • Yokohama National University

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30 Citations (Scopus)

Résumé

Neutral current (NC) interactions of atmospheric neutrinos on oxygen form one of the major backgrounds in the search for supernova relic neutrinos with water-based Cherenkov detectors. The NC channel is dominated by neutrino quasielastic (NCQE) scattering off nucleons inside O16 nuclei. In this paper we report the first measurement of NCQE cross section using atmospheric neutrinos at Super-Kamiokande (SK). The measurement used 2,778 live days of SK-IV data with a fiducial volume of 22.5 kiloton water. Within the visible energy window of 7.5-29.5 MeV, we observed 117 events compared to the expected 71.9 NCQE signal and 53.1 background events. Weighted by the atmospheric neutrino spectrum from 160 MeV to 10 GeV, the flux averaged NCQE cross section is measured to be (1.01±0.17(stat.)-0.30+0.78(sys.))×10-38 cm2.

langue originaleAnglais
Numéro d'article032005
journalPhysical Review D
Volume99
Numéro de publication3
Les DOIs
étatPublié - 1 févr. 2019

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