Measurement of the proton-air cross section at √s=57  TeV with the Pierre Auger Observatory

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Date

2012

Authors

Barber, K.
Bellido Caceres, J.
Clay, R.
Cooper, M.
Dawson, B.
Harrison, T.
Herve, A.
Holmes, V.
Sorokin, J.
Wahrlich, P.

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Physical Review Letters, 2012; 109(6):1-9

Statement of Responsibility

K. B Barber.... J.A. Bellido.... R.W. Clay.... M.J. Cooper.... B.R. Dawson.... T.A. Harrison.... A.E. Herve.... V.C. Holmes.... J. Sorokin.... P. Wahrlich.... B.J. Whelan.... M. G. Winnick... et al.(The Pierre Auger Collaboration)

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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. 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.

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©2012 American Physical Society

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