Measurement of the Fluctuations in the Number of Muons in Extensive Air Showers with the Pierre Auger Observatory

A. Aab (IMAPP, Radboud University Nijmegen, Nijmegen, The Netherlands) ; P. Abreu (Laboratório de Instrumentação e Física Experimental de Partículas—LIP and Instituto Superior Técnico—IST, Universidade de Lisboa—UL, Lisboa, Portugal) ; M. Aglietta (Osservatorio Astrofisico di Torino (INAF), Torino, Italy; INFN, Sezione di Torino, Torino, Italy) ; J. M. Albury (University of Adelaide, Adelaide, South Australia, Australia) ; I. Allekotte (Centro Atómico Bariloche and Instituto Balseiro (CNEA-UNCuyo-CONICET), San Carlos de Bariloche, Argentina) ; et al. - Show all 367 authors

We present the first measurement of the fluctuations in the number of muons in extensive air showers produced by ultrahigh energy cosmic rays. We find that the measured fluctuations are in good agreement with predictions from air shower simulations. This observation provides new insights into the origin of the previously reported deficit of muons in air shower simulations and constrains models of hadronic interactions at ultrahigh energies. Our measurement is compatible with the muon deficit originating from small deviations in the predictions from hadronic interaction models of particle production that accumulate as the showers develop.

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      "source": "APS", 
      "title": "Measurement of the Fluctuations in the Number of Muons in Extensive Air Showers with the Pierre Auger Observatory"
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      "statement": "Published by the American Physical Society", 
      "year": "2021"
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  "control_number": "61433", 
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  "abstracts": [
    {
      "source": "APS", 
      "value": "We present the first measurement of the fluctuations in the number of muons in extensive air showers produced by ultrahigh energy cosmic rays. We find that the measured fluctuations are in good agreement with predictions from air shower simulations. This observation provides new insights into the origin of the previously reported deficit of muons in air shower simulations and constrains models of hadronic interactions at ultrahigh energies. Our measurement is compatible with the muon deficit originating from small deviations in the predictions from hadronic interaction models of particle production that accumulate as the showers develop."
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Published on:
16 April 2021
Publisher:
APS
Published in:
Physical Review Letters , Volume 126 (2021)
Issue 15
DOI:
https://doi.org/10.1103/PhysRevLett.126.152002
arXiv:
2102.07797
Copyrights:
Published by the American Physical Society
Licence:
CC-BY-4.0

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