0000000000460124

AUTHOR

A. Lopez Casado

showing 2 related works from this author

Testing Hadronic Interactions at Ultrahigh Energies with Air Showers Measured by the Pierre Auger Observatory

2016

Ultrahigh energy cosmic ray air showers probe particle physics at energies beyond the reach of accelerators. Here we introduce a new method to test hadronic interaction models without relying on the absolute energy calibration, and apply it to events with primary energy 6-16 EeV (ECM=110-170 TeV), whose longitudinal development and lateral distribution were simultaneously measured by the Pierre Auger Observatory. The average hadronic shower is 1.33±0.16 (1.61±0.21) times larger than predicted using the leading LHC-tuned models EPOS-LHC (QGSJetII-04), with a corresponding excess of muons.

Hadronic interaction[PHYS.ASTR.HE]Physics [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE]Particle physicsCOLLISIONSAstronomyAstrophysics::High Energy Astrophysical PhenomenaHadronFOS: Physical sciencesGeneral Physics and AstronomyCosmic ray01 natural sciences7. Clean energyHigh Energy Physics - ExperimentAugerHigh Energy Physics - Experiment (hep-ex)Physics and Astronomy (all)High Energy Physics - Phenomenology (hep-ph)Observatory0103 physical sciencesCalibrationHigh Energy PhysicsUHE Cosmic Rays010306 general physicsParticle PhysicsCosmic raysGeneralLiterature_REFERENCE(e.g.dictionariesencyclopediasglossaries)High Energy Astrophysical Phenomena (astro-ph.HE)PhysicsPierre Auger ObservatoryEnergyMuon010308 nuclear & particles physicsSettore FIS/01 - Fisica SperimentaleAstrophysics::Instrumentation and Methods for AstrophysicsFísicaInteraction modelASTROFÍSICAHigh Energy Physics - Phenomenology13. Climate actionExperimental High Energy PhysicsHigh Energy Physics::ExperimentAstrophysics - High Energy Astrophysical Phenomena
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Direct measurement of the muonic content of extensive air showers between 2× 1017 and 2×1018 eV at the Pierre Auger Observatory

2020

The hybrid design of the Pierre Auger Observatory allows for the measurement of the properties of extensive air showers initiated by ultra-high energy cosmic rays with unprecedented precision. By using an array of prototype underground muon detectors, we have performed the first direct measurement, by the Auger Collaboration, of the muon content of air showers between 2 × 10 17 and 2 × 10 18 eV. We have studied the energy evolution of the attenuation-corrected muon density, and compared it to predictions from air shower simulations. The observed densities are found to be larger than those predicted by models. We quantify this discrepancy by combining the measurements from the muon detector …

Muon detector ultra-high energy cosmic raysmuonsUHE Cosmic Rays
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