INVESTIGADORES
MARIAZZI Analisa Gabriela
artículos
Título:
Muons in air showers at the Pierre Auger Observatory: mean number in highly inclined events
Autor/es:
PIERRE AUGER COLLABORATION (A. AAB, ... , A. MARIAZZI, ET AL)
Revista:
PHYSICAL REVIEW D - PARTICLE AND FILDS
Editorial:
American Physical Society
Referencias:
Año: 2015 vol. 91 p. 59901 - 59901
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 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)).