Conveners
High energy cosmic rays I
- Jacek Niemiec (Institute of Nuclear Physics Polish Academy of Sciences)
High energy cosmic rays I
- Zhen Cao (Institute of High Energy Physics, CAS, China)
The quest for the origin of ultra-high-energy cosmic rays (UHECRs) continues to be an open question in high energy astrophysics. We will give an overview of the current status of the field from an experimental point of view, discussing the most recent results and the information obtained in a multi-messenger approach. The open problems and the perspectives of multi-messenger observatories...
Large High-Altitude Air Shower Observatory (LHAASO) has one square kilometer array of scintillator detectors and muon detectors (KM2A), 18 Wide Field of View Imaging Atmospheric Cherenkov Telescopes (WFCTA) and a 78,000 square meter Water Cherenkov Detector Array (WCDA). LHAASO is located at very high altitude (around 4410 m a.s.l.) in Haizishan mountain, Daocheng, Sichuan, China....
In this talk we will report on the investigation of cosmic rays in the energy range between some 100 TeV and about 1 EeV using the IceCube Neutrino Observatory at the South Pole. The IceCube facility combines the in-ice detector with the 1-km$^2$ surface detector IceTop. The combination offers a unique possibility to study the air shower development at the surface together with the high energy...
Over the past forty years, there have been occasional reports of the observations of ‘bursts’ by small air shower arrays operating at energies of about 1 PeV. These would seem to be of astrophysical origin and related to the thrust of studies pursued to the CREDO program. The bursts are rare and few burst searches have extended past a a time required to record more than a handful of...
In this talk, I will revisit our understanding of the air shower initiated by ultra high energy cosmic rays, focusing on the hadronic core and how macroscopic variables relate with the microscopic variables of the highest energy hadronic interactions therein. Many of those interactions occur at energies and phase-space regions beyond the reach of accelerator experiments. It will be shown how...
Indications of a discrepancy between simulations and data on the number of muons in cosmic ray showers exist over a large span of investigations. The excess of muon bundles has been observed by the ALICE detector at LHC in its dedicated cosmic ray run (confirming similar findings from the LEP era at CERN) as well as the excess in the muon number in general has been reported by the Pierre...
DAMPE (DArk Matter Particle Explorer) is a satellite-born experiment smoothly taking data since its launch in december 2015. The detector features (good resolutions, large geometric factor, etc.) allow measuring the energy spectra of galactic cosmic rays (electrons/positrons , protons and single nuclear species) up to hundreds of TeV (few TeV in case of electrons/positrons). A first direct...
