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Measurement of Charged-Particle Production in sNN=9.62 TeV Proton-Oxygen Collisions as a Probe of Cosmic-Ray Air Showers with the ATLAS Detector

et al.
Creative Commons 'BY' version 4.0 license
Abstract

This Letter presents a measurement of prompt charged-particle production in proton-oxygen interactions at center-of-mass energy with the ATLAS detector, corresponding to of integrated luminosity. A total of selected events have at least one track with transverse momentum and pseudorapidity . The measured fiducial proton-oxygen cross section is and the extrapolated inelastic proton-air cross section is . Measurements of charged-particle multiplicity, , and distributions are an order-of-magnitude more precise than differences between hadronic-interaction models. These results enable improved modeling of cosmic-ray air showers, which is important for astroparticle physics.

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