Wan, L, Abe, K, Bronner, C, Hayato, Y, Ikeda, M, Iyogi, K, Kameda, J, Kato, Y, Kishimoto, Y, Marti, Ll et al (show 156 more authors)
(2019)
Measurement of the neutrino-oxygen neutral-current quasielastic cross section using atmospheric neutrinos at Super-Kamiokande.
PHYSICAL REVIEW D, 99 (3).
032005-.
Abstract
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 quasi-elastic (NCQE) scattering off nucleons inside $^{16}$O 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 $(1.01\pm0.17(\text{stat.})^{+0.78}_{-0.30}(\text{sys.}))\times10^{-38}$ cm$^2$.
Item Type: | Article |
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Additional Information: | 11 pages, 9 figures, submitted to PRD |
Uncontrolled Keywords: | hep-ex, hep-ex |
Depositing User: | Symplectic Admin |
Date Deposited: | 13 Mar 2019 15:55 |
Last Modified: | 19 Jan 2023 00:57 |
DOI: | 10.1103/PhysRevD.99.032005 |
Open Access URL: | https://journals.aps.org/prd/abstract/10.1103/Phys... |
Related URLs: | |
URI: | https://livrepository.liverpool.ac.uk/id/eprint/3034044 |