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

3 APC - AHE
APC - UMR 7164 - AstroParticule et Cosmologie
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.
Document type :
Journal articles
Physical Review Letters, American Physical Society, 2012, 109, pp.062002. <10.1103/PhysRevLett.109.062002>
Domain :

http://hal.in2p3.fr/in2p3-00723317
Contributor : Emmanuelle Vernay <>
Submitted on : Thursday, August 9, 2012 - 8:33:03 AM
Last modification on : Thursday, September 3, 2015 - 1:04:57 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>

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