Author: A. Almeda

0000000000628149

AUTHOR

A. Almeda

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Measurement of the Proton-Air Cross Section ats=57 TeVwith the Pierre Auger Observatory

2012

We report a measurement of the proton-air cross section for particle production at the center-of-mass energy per nucleon of 57 TeV. This is derived from the distribution of the depths of shower maxima observed with the Pierre Auger Observatory: systematic uncertainties are studied in detail. Analyzing the tail of the distribution of the shower maxima, a proton-air cross section of [505 +/- 22(stat)(-36)(+28)(syst)] mb is found.

Pierre Auger ObservatoryPhysicsProton010308 nuclear & particles physicsAstrophysics::High Energy Astrophysical PhenomenaHadronAstrophysics::Instrumentation and Methods for AstrophysicsGeneral Physics and Astronomy01 natural scienceslaw.inventionAugerNuclear physicsCross section (physics)law0103 physical sciencesHigh Energy Physics::ExperimentFermilabNuclear Experiment010306 general physicsNucleonColliderPhysical Review Letters

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