Abstract
Inverse muon decay, , is a reaction whose cross section can be predicted with very small uncertainties. It has a neutrino energy threshold of and can be used to constrain the high-energy part of the flux in the NuMI neutrino beam. This reaction is the dominant source of events which only contain high-energy muons nearly parallel to the direction of the neutrino beam. We have isolated a sample of hundreds of such events in neutrino and antineutrino enhanced beams, and have constrained the predicted high-energy flux.
1 More- Received 2 July 2021
- Accepted 13 October 2021
DOI:https://doi.org/10.1103/PhysRevD.104.092010
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Published by the American Physical Society