Muons in air showers at the Pierre Auger Observatory: Mean number in highly inclined events

We present the first hybrid measurement of the average muon number in air showers at ultrahigh energies, initiated by cosmic rays with zenith angles between 62° and 80°. The measurement is based on 174 hybrid events recorded simultaneously with the surface detector array and the fluorescence detecto...

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Acceso en línea:http://hdl.handle.net/20.500.12110/paper_15507998_v91_n3_p_Multitudinario
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spelling todo:paper_15507998_v91_n3_p_Multitudinario2023-10-03T16:25:08Z Muons in air showers at the Pierre Auger Observatory: Mean number in highly inclined events Multitudinario:480 We present the first hybrid measurement of the average muon number in air showers at ultrahigh energies, initiated by cosmic rays with zenith angles between 62° and 80°. The measurement is based on 174 hybrid events recorded simultaneously with the surface detector array and the fluorescence detector of the Pierre Auger Observatory. The muon number for each shower is derived by scaling a simulated reference profile of the lateral muon density distribution at the ground until it fits the data. A 1019eV shower with a zenith angle of 67°, which arrives at the surface detector array at an altitude of 1450 m above sea level, contains on average (2.68±0.04±0.48(sys))×107 muons with energies larger than 0.3 GeV. The logarithmic gain dlnNμ/dlnE of muons with increasing energy between 4×1018eV and 5×1019eV is measured to be (1.029±0.024±0.030(sys)). © 2015 American Physical Society. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_15507998_v91_n3_p_Multitudinario
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description We present the first hybrid measurement of the average muon number in air showers at ultrahigh energies, initiated by cosmic rays with zenith angles between 62° and 80°. The measurement is based on 174 hybrid events recorded simultaneously with the surface detector array and the fluorescence detector of the Pierre Auger Observatory. The muon number for each shower is derived by scaling a simulated reference profile of the lateral muon density distribution at the ground until it fits the data. A 1019eV shower with a zenith angle of 67°, which arrives at the surface detector array at an altitude of 1450 m above sea level, contains on average (2.68±0.04±0.48(sys))×107 muons with energies larger than 0.3 GeV. The logarithmic gain dlnNμ/dlnE of muons with increasing energy between 4×1018eV and 5×1019eV is measured to be (1.029±0.024±0.030(sys)). © 2015 American Physical Society.
format JOUR
author Multitudinario:480
spellingShingle Multitudinario:480
Muons in air showers at the Pierre Auger Observatory: Mean number in highly inclined events
author_facet Multitudinario:480
author_sort Multitudinario:480
title Muons in air showers at the Pierre Auger Observatory: Mean number in highly inclined events
title_short Muons in air showers at the Pierre Auger Observatory: Mean number in highly inclined events
title_full Muons in air showers at the Pierre Auger Observatory: Mean number in highly inclined events
title_fullStr Muons in air showers at the Pierre Auger Observatory: Mean number in highly inclined events
title_full_unstemmed Muons in air showers at the Pierre Auger Observatory: Mean number in highly inclined events
title_sort muons in air showers at the pierre auger observatory: mean number in highly inclined events
url http://hdl.handle.net/20.500.12110/paper_15507998_v91_n3_p_Multitudinario
work_keys_str_mv AT multitudinario480 muonsinairshowersatthepierreaugerobservatorymeannumberinhighlyinclinedevents
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