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Title: Measurement of the average shape of longitudinal profiles of cosmic-ray air showers at the Pierre Auger Observatory

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 > 10^{17.8} eV. A detailed analysis of the systematic uncertainties is performed using 10 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.

Authors:
;
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Org.:
Pierre Auger
OSTI Identifier:
1495359
Report Number(s):
arXiv:1811.04660; FERMILAB-PUB-18-633
1703212
DOE Contract Number:  
AC02-07CH11359
Resource Type:
Journal Article
Journal Name:
JCAP
Additional Journal Information:
Journal Name: JCAP
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS

Citation Formats

Aab, Alexander, and et al. Measurement of the average shape of longitudinal profiles of cosmic-ray air showers at the Pierre Auger Observatory. United States: N. p., 2018. Web.
Aab, Alexander, & et al. Measurement of the average shape of longitudinal profiles of cosmic-ray air showers at the Pierre Auger Observatory. United States.
Aab, Alexander, and et al. Mon . "Measurement of the average shape of longitudinal profiles of cosmic-ray air showers at the Pierre Auger Observatory". United States. https://www.osti.gov/servlets/purl/1495359.
@article{osti_1495359,
title = {Measurement of the average shape of longitudinal profiles of cosmic-ray air showers at the Pierre Auger Observatory},
author = {Aab, Alexander and et al.},
abstractNote = {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 > 10^{17.8} eV. A detailed analysis of the systematic uncertainties is performed using 10 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.},
doi = {},
journal = {JCAP},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {11}
}