INVESTIGADORES
MOLLERACH Maria Silvia
artículos
Título:
Muons in air showers at the Pierre Auger Observatory: mean number in highly inclined events
Autor/es:
THE PIERRE AUGER COLLABORATION, INCLUYE S. MOLLERACH
Revista:
PHYSICAL REVIEW D - PARTICLE AND FILDS
Editorial:
American Physical Society
Referencias:
Año: 2015
ISSN:
0556-2821
Resumen:
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 d ln Nmu/d ln E of muons with
increasing energy between 4 ×1018 eV and 5
×1019 eV is measured to be (1.029 ±0.024
±0.030 (sys)) .