Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
1998-07-31
Astropart.Phys.9:105-117,1998
Physics
High Energy Physics
High Energy Physics - Experiment
18 pages, 9 figures. Accepted by Astrop. Physics
Scientific paper
10.1016/S0927-6505(98)00010-3
An experimental study of the production of up-going charged particles in inelastic interactions of down-going underground muons is reported, using data obtained from the MACRO detector at the Gran Sasso Laboratory. In a sample of 12.2 10^6 single muons, corresponding to a detector livetime of 1.55 y, 243 events are observed having an up-going particle associated with a down-going muon. These events are analysed to determine the range and emission angle distributions of the up-going particle, corrected for detection and reconstruction efficiency. Measurements of the muon neutrino flux by underground detectors are often based on the observation of through-going and stopping muons produced in $\nu_\mu$ interactions in the rock below the detector. Up-going particles produced by an undetected down-going muon are a potential background source in these measurements. The implications of this background for neutrino studies using MACRO are discussed.
et al Ambrosio M.
The MACRO Collaboration
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