20.500.12556/RUNG-2136
Composition at the “ankle” measured by the Pierre Auger Observatory: pure or mixed?
We report for the first time on the measurement of the
correlation between the depth of shower maximum and the signal
in water-Cherenkov stations for events reconstructed by both
the fluorescence and the surface detectors of the Pierre Auger Observatory. Such a correlated measurement is a unique feature
of a hybrid air-shower observatory and allows us to determine
the purity of the cosmic-ray composition. The observed
correlation in the energy range around the “ankle”
lg(E/eV) = 18.5−19.0 differs significantly from the expectations for pure beams, indicating that the primary composition in this range is mixed, unless the
hadronic interactions at these energies behave very
differently than in conventional, LHC-tuned event generators.
ultra-high energy cosmic rays
elemental composition
depth of shower maximum
secondary cosmic rays
Pierre Auger Observatory
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Angleški jezik
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2016-03-02 13:57:29
2016-03-02 17:50:02
2023-06-09 03:15:44
0000-00-00 00:00:00
2015
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4151035
URN:SI:UNG:REP:517GG144
ICRC2015_335.pdf
ICRC2015_335.pdf
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33C363A70A64D5E14EE42C09F73183A5
ccd1dc72e07307287f3b61dd5a136c5715550f73ba600977692a901b8363d463
dde4a7b9-05cd-11ee-9c48-5ef991fed68f
https://repozitorij.ung.si/Dokument.php?lang=slv&id=3453
Univerza v Novi Gorici
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