A New Upper Limit for the Tau-Neutrino Magnetic Moment
DONUT Collaboration
Abstract
Using a prompt neutrino beam in which a nutau component was identified for the first time, the nutau magnetic moment was measured based on a search for an anomalous increase in the number of neutrino-electron interactions. One such event was observed when 2.3 were expected from background processes, giving an upper 90% confidence limit of 3.9x10-7 Bohr magnetons.
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