A. Aab (Author), Andrej Filipčič (Author), Gašper Kukec Mezek (Author), J. P. Lundquist (Author), Samo Stanič (Author), M. Trini (Author), Serguei Vorobiov (Author), Danilo Zavrtanik (Author), Marko Zavrtanik (Author), Lukas Zehrer (Author)

Abstract

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.

Keywords

ultra-high energy cosmic rays;extensive air showers (EAS);EAS muonic component;hadronic interaction models;Pierre Auger Observatory;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UNG - University of Nova Gorica
UDC: 52
COBISS: 60176643 Link will open in a new window
ISSN: 0031-9007
Views: 13
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Other data

URN: URN:SI:UNG
Pages: str. 1-11
Volume: ǂVol. ǂ126
Issue: ǂiss. ǂ15
Chronology: 2021
DOI: 10.1103/PhysRevLett.126.152002
ID: 12835065