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Direct measurement of the muonic content of extensive air showers between 2 × 10.sup.17./sup. and 2 × 10.sup.18./sup. eV at the Pierre Auger Observatory
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SYSNO ASEP 0535423 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Direct measurement of the muonic content of extensive air showers between 2 × 1017 and 2 × 1018 eV at the Pierre Auger Observatory Author(s) Aab, A. (NL)
Abreu, A. (PT)
Aglietta, M. (IT)
Bakalová, Alena (FZU-D) ORCID
Blažek, Jiří (FZU-D) ORCID, RID
Boháčová, Martina (FZU-D) RID, ORCID
Chudoba, Jiří (FZU-D) RID, ORCID
Ebr, Jan (FZU-D) RID, ORCID
Juryšek, Jakub (FZU-D) ORCID
Mandát, Dušan (FZU-D) RID, ORCID
Palatka, Miroslav (FZU-D) RID, ORCID, SAI
Pech, Miroslav (FZU-D) RID, ORCID
Prouza, Michael (FZU-D) RID, ORCID
Řídký, Jan (FZU-D) RID, ORCID
dos Santos, Eva M. Martins (FZU-D) ORCID
Schovánek, Petr (FZU-D) RID, ORCID
Tobiška, Petr (FZU-D) ORCID
Trávníček, Petr (FZU-D) RID, ORCID
Vícha, Jakub (FZU-D) RID, ORCID
Yushkov, Alexey (FZU-D) ORCIDNumber of authors 372 Article number 751 Source Title European Physical Journal C. - : Springer - ISSN 1434-6044
Roč. 80, č. 8 (2020), s. 1-19Number of pages 19 s. Language eng - English Country US - United States Keywords cosmic ray experiments ; ultra high energy cosmic rays ; air showers ; Pierre Auger Observatory Subject RIV BF - Elementary Particles and High Energy Physics OECD category Particles and field physics R&D Projects LTT18004 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) LM2015038 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) EF16_013/0001402 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) LM2018102 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Open access Institutional support FZU-D - RVO:68378271 UT WOS 000564267800003 EID SCOPUS 85089537583 DOI 10.1140/epjc/s10052-020-8055-y Annotation The hybrid design of the Pierre Auger Observatory allows for the measurement of the properties of extensive air showers initiated by ultra-high energy cosmic rays with unprecedented precision. By using an array of prototype underground muon detectors, we have performed the first direct measurement, by the Auger Collaboration, of the muon content of air showers between 2x1017 and 2x1018 eV. We have studied the energy evolution of the attenuation-corrected muon density, and compared it to predictions from air shower simulations. The observed densities are found to be larger than those predicted by models. We quantify this discrepancy by combining the measurements from the muon detector with those from the Auger fluorescence detector at 1017.5 eV and 1018 eV. We find that, for the models to explain the data, an increase in the muon density of 38%+/- 4%(12%)+/- 18%21% for EPOS-LHC, and of 50%(53%)+/- 4%(13%)+/- 20%23% for QGSJetII-04, is respectively needed.
Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2021 Electronic address http://hdl.handle.net/11104/0313469
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