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Title:Measurement of the muon content in air showers at the Pierre Auger Observatory
Authors:Collica, Laura (Author)
Filipčič, Andrej (Author)
Kukec Mezek, Gašper (Author)
Saleh, Ahmed (Author)
Stanič, Samo (Author)
Trini, Marta (Author)
Veberič, Darko (Author)
Vorobiov, Serguei (Author)
Yang, Lili (Author)
Zavrtanik, Danilo (Author)
Zavrtanik, Marko (Author)
et al.
Files:.pdf ICRC2015_336.pdf (298,46 KB)
Work type:Not categorized (r6)
Tipology:1.08 - Published Scientific Conference Contribution
Organization:UNG - University of Nova Gorica
Abstract:The muon content of extensive air showers is an observable sensitive to the primary composition and to the hadronic interaction properties. We present here different methods which allow us to estimate the muon number at the ground level and the muon production depth by exploiting the measurement of the longitudinal, lateral and temporal distribution of particles in air showers recorded at the Pierre Auger Observatory. The results, obtained at about 10[sup]19 eV (E[inf]CM ∼ 140 TeV center-of-mass energy for proton primaries), are compared to the predictions of LHC-tuned hadronic interaction models with different primary masses and suggest a deficit in the muon content at the ground predicted by simulations. The Pierre Auger Observatory uses water-Cherenkov detectors to measure particle densities at the ground and therefore has a good sensitivity to the muon content of air showers. Moreover, due to its hybrid design, the combination of muon measurements with other independent mass composition analyses such as Xmax provides additional constraints on hadronic interaction models.
Keywords:Pierre Auger Observatory, ultra-high energy cosmic rays, muons, mass composition, hadronic interactions
Year of publishing:2015
COBISS_ID:4152315 Link is opened in a new window
License:CC BY-NC-SA 4.0
This work is available under this license: Creative Commons Attribution Non-Commercial Share Alike 4.0 International
Categories:Document is not linked to any category.
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Record is a part of a monograph

Title:The 34th International Cosmic Ray Conference
Subtitle:ICRC 2015 (The Hague, Netherlands)
Conference organizer:International Union of Pure and Applied Physics (IUPAP)
Collection title:Proceedings of ICRC 2015
Year of publishing:2015