Measuring the muon content of inclined air showers using AERA and the particle detector of the Pierre Auger Observatory

0580156 - FZÚ 2024 RIV IT eng C - Conference Paper (international conference)
Abreu, A. - Aglietta, M. - Allekotte, I. - Gottowik, M. - Bakalová, Alena - Blažek, Jiří - Boháčová, Martina - Chudoba, Jiří - Ebr, Jan - Hamal, Petr - Janeček, Petr - Juryšek, Jakub - Mandát, Dušan - Müller, Ana Laura - Palatka, Miroslav - Pech, Miroslav - Prouza, Michael - Řídký, Jan - dos Santos, Eva M. Martins - Schovánek, Petr - Stadelmaier, Maximilian Klaus - Tobiška, Petr - Trávníček, Petr - Vícha, Jakub - Yushkov, Alexey … Total 374 authors
Measuring the muon content of inclined air showers using AERA and the particle detector of the Pierre Auger Observatory.
Proceedings of Science. Vol. 424. Trieste: Sissa Medilab srl, 2023, č. článku 049. ISSN 1824-8039.
[9th International Workshop on Acoustic and Radio EeV Neutrino Detection Activities (ARENA2022). Santiago de Compostela (ES), 07.06.2022-10.06.2022]
R&D Projects: GA MŠMT LTT18004; GA MŠMT(CZ) EF18_046/0016010; GA MŠMT EF16_013/0001402
Research Infrastructure: AUGER-CZ II - 90102
Institutional support: RVO:68378271
Keywords : air showers * ultra-high-energy cosmic rays
OECD category: Particles and field physics
https://pos.sissa.it/424/049/pdf

A first measurement of the muon content of air showers using hybrid measurements combining radio and particle detection is presented. For inclined air showers with zenith angles above 60°, the water-Cherenkov detector (WCD) of the Pierre Auger Observatory performs an almost pure measurement of the muonic component, whereas the Auger Engineering Radio Array (AERA) allows reconstructing the electromagnetic energy independently using the radio emission of the air shower. The analysis of more than six years of AERA data shows a deficit of muons predicted by all current-generation hadronic interaction models for energies between 4 EeV and 20 EeV. This deficit, already observed in previous analyses of Auger, is now confirmed for the first time with radio data. This analysis is limited by low statistics of only 59 high-quality events due to the small area of AERA of 17 km² and the high energy threshold of 4 EeV originating from the WCD reconstruction.
Permanent Link: https://hdl.handle.net/11104/0348916