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Type: Journal article
Title: Measurement of the average shape of longitudinal profiles of cosmic-ray air showers at the Pierre Auger Observatory
Author: Aab, A.
Abreu, P.
Aglietta, M.
Albuquerque, I.F.M.
Albury, J.M.
Allekotte, I.
Almela, A.
Castillo, J.A.
Alvarez-Muñiz, J.
Anastasi, G.A.
Anchordoqui, L.
Andrada, B.
Andringa, S.
Aramo, C.
Asorey, H.
Assis, P.
Avila, G.
Badescu, A.M.
Bakalova, A.
Balaceanu, A.
et al.
Citation: Journal of Cosmology and Astroparticle Physics, 2019; 2019(3)
Publisher: IOP Publishing
Issue Date: 2019
ISSN: 1475-7516
Statement of
A. Aab … J.M. Albury … J.A. Bellido … S.G. Blaess … R.W. Clay … M.J. Cooper … B.R. Dawson … J.A. Day … T.D. Grubb … T.A. Harrison … V.M. Harvey … G.C. Hill … B.C. Manning … P.H. Nguyen … S.J. Saffi .. T. Sudholz … P. Van Bodegom … [et al.] (The Pierre Auger Collaboration)
Abstract: The profile of the longitudinal development of showers produced by ultra-high energy cosmic rays carries information related to the interaction properties of the primary particles with atmospheric nuclei. In this work, we present the first measurement of the average shower profile in traversed atmospheric depth at the Pierre Auger Observatory. The shapes of profiles are well reproduced by the Gaisser-Hillas parametrization within the range studied, for E>10¹⁷·⁸ eV . A detailed analysis of the systematic uncertainties is performed using ten years of data and a full detector simulation. The average shape is quantified using two variables related to the width and asymmetry of the profile, and the results are compared with predictions of hadronic interaction models for different primary particles.
Keywords: Cosmic rays detectors; ultra high energy cosmic rays
Rights: © 2019 IOP Publishing Ltd and Sissa Medialab
DOI: 10.1088/1475-7516/2019/03/018
Grant ID: ARC
CZ. 02.1.01/0.0/0.0/16 013/0001402
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