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ULTRA–HIGH-ENERGY COSMIC RAYS [PDF]
Lepton and Photon Interactions at High Energies, 2006 One of the most striking astrophysical phenomena today is the existence of cosmic ray particles with energies in excess of 1020 eV. While their presence has been confirmed by a number of experiments, it is not clear where and how these particles are accelerated to these energies and how they travel astronomical distances without substantial energy ...
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Multi-messenger studies with the Pierre Auger Observatory [PDF]
EPJ Web of Conferences, 2023 The combination of data from observatories measuring ultra-high energy cosmic rays, photons, neutrinos and gravitational waves has provided new insights into the most extreme phenomena in the Universe.
Perrone Lorenzo
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Measurements of very-forward energy with the CASTOR calorimeter of CMS [PDF]
EPJ Web of Conferences, 2019 The very-forward energy production in hadron collisions is of paramount importance for the understanding of ultra-high energy cosmic ray air showers. The CASTOR calorimeter of CMS is located at -6:6 < η < -5:2 in the phase-space where the peak of energy ...
Baur Sebastian
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Cosmic ray contribution in extragalactic background gamma-ray emission at an energy of 0.1 TeV
EPJ Web of Conferences, 2017 We estimate the intensity of gamma-quanta at the energy 0.1 TeV that is generated in extragalactic space in interactions of ultra-high energy cosmic rays with the cosmic background emission.
Uryson Anna
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Ultra High Energy Cosmic Rays [PDF]
AIP Conference Proceedings, 2003 The physics of cosmic rays was intensively developed during the last century. The subject of ultra high energy cosmic rays has received special attention during the last partly due to the controversy between the results of the HiRes and AGASA Observatories and the puzzle caused by super‐GZK observed events.
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Constraints on direct acceleration of UHECRs in astrophysical sources
EPJ Web of Conferences, 2013 A toy model of the population of numerous non-identical extragalactic sources of ultra-high-energy cosmic rays is presented. In the model, the acceleration of cosmic-ray particles is direct (not diffusive) and takes place in magnetospheres of ...
Ptitsyna Ksenia +2 more
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The Astrophysical Journal, 2023 The origin and mass composition of ultrahigh-energy cosmic rays is one of the big open questions of modern physics. Estimating the mass of ultrahigh-energy cosmic rays always involves the comparison of data with simulations using hadronic interaction ...
Maximilian Stadelmaier
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Applied Sciences, 2021 The Cosmic-Ray Extremely Distributed Observatory (CREDO) was established to detect and study ultra high-energy cosmic ray particles. In addition to making use of traditional methods for finding rare and extended cosmic ray events such as professional ...
Michał Karbowiak +8 more
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Physics of the Dark Universe, 2014 AbstractExperimental efforts to reveal the nature and origin of cosmic rays with energy above 1018 eV led to several important steps forward in recent years. The existence of a suppression of the flux above 4×1019 eV has been confirmed. It occurs at the energy threshold for pion-production in proton collisions with the cosmic microwave background, as
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Feasibility of Correlated Extensive Air Shower Detection with a Distributed Cosmic-Ray Network
The Astrophysical Journal, 2023 We explore the sensitivity offered by a global network of cosmic-ray detectors to a novel, unobserved phenomenon: widely separated simultaneous extended air showers.
Eric K. Albin, Daniel Whiteson
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