Measurement of a small atmospheric νμ/νe ratio
Abstract
From an exposure of 25.5 kiloton-years of the Super-Kamiokande detector, 900 muon-like and 983 electron-like single-ring atmospheric neutrino interactions were detected with momentum pe>100 MeV/c, pμ>200 MeV/c, and with visible energy less than 1.33 GeV. Using a detailed Monte Carlo simulation, the ratio (μ/e)DATA/(μ/e)MC was measured to be 0.61+/-0.03(stat.)+/-0.05(sys.), consistent with previous results from the Kamiokande, IMB and Soudan-2 experiments, and smaller than expected from theoretical models of atmospheric neutrino production.
- Publication:
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Physics Letters B
- Pub Date:
- August 1998
- DOI:
- 10.1016/S0370-2693(98)00476-6
- arXiv:
- arXiv:hep-ex/9803006
- Bibcode:
- 1998PhLB..433....9S
- Keywords:
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- High Energy Physics - Experiment
- E-Print:
- 14 pages with 5 figures