Muons in air showers at the Pierre Auger Observatory: mean number in highly inclined events
Date
2015
Authors
Aab, A.
Abreu, P.
Aglietta, M.
Ahn, E.
Al Samarai, I.
Albuquerque, I.
Allekotte, I.
Allen, J.
Allison, P.
Almela, A.
Editors
Advisors
Journal Title
Journal ISSN
Volume Title
Type:
Journal article
Citation
Physical Review D: Particles, Fields, Gravitation and Cosmology, 2015; 91(3):032003-1-032003-12
Statement of Responsibility
A. Aab ... J. A. Bellido ... R.W. Clay ... M. J. Cooper ... B. R. Dawson ... T. D. Grubb ... T. A. Harrison ... G. C. Hill ... M. Malacari ... S. J. Saffi ... J. Sorokin ... et al. (Pierre Auger Collaboration)
Conference Name
Abstract
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 1019 eV 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 4×1018 eV and 5×1019 eV is measured to be (1.029±0.024±0.030(sys)).
School/Discipline
Dissertation Note
Provenance
Description
J. A. Bellido, R.W. Clay, M. J. Cooper, B. R. Dawson, T. D. Grubb, T. A. Harrison, G. C. Hill, M. Malacari, S. J. Saffi, J. Sorokin are members of The Pierre Auger Collaboration
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Rights
© 2015 American Physical Society