An upward-going muon background estimation

Astronomy and Astrophysics – Astronomy

Scientific paper

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Background Radiation, Cosmic Rays, Muons, Radiation Detectors, Energetic Particles, Particle Flux Density, Particle Production

Scientific paper

A technique has been suggested for constructing above-ground detectors of upward-going muons produced by neutrinos. We have calculated the background in such a detector from cosmic ray muons which pass underground, scatter, and emerge from the ground traveling upwards. Except for the region within about 15 deg of the horizon, this background is smaller than the unavoidable background from underground interactions of atmospheric neutrinos. The simulation included effects of ionization energy loss, multiple Coulomb scattering, large angle single and plural scattering on nuclei, and elastic and inelastic scattering of muons on nucleons. The background from scattered cosmic ray hadrons was also estimated and found to be small compared with that from backscattered muons.

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