# Measurement of the proton-air cross-section at $\sqrt{s}=57$ TeV with the Pierre Auger Observatory

Abstract : 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. Analysing the tail of the distribution of the shower maxima, a proton-air cross-section of $[505\pm22(stat)^{+28}_{-36}(sys)]$ mb is found.
docType_s : Journal articles
Domain :

http://hal.in2p3.fr/in2p3-00723317
Contributor : Vernay Emmanuelle <>
Submitted on : Thursday, August 9, 2012 - 8:00:33 AM
Last modification on : Thursday, August 9, 2012 - 8:00:33 AM

### Citation

P. Abreu, M. Avenier, C. Bérat, J. Chauvin, D.H. Koang, et al.. Measurement of the proton-air cross-section at $\sqrt{s}=57$ TeV with the Pierre Auger Observatory. Physical Review Letters, American Physical Society, 2012, 109, pp.062002. <10.1103/PhysRevLett.109.062002>. <in2p3-00723317>