Abstract The Giant Radio Array for Neutrino Detection (GRAND) is a planned large-scale
observatory of ultra-high-energy (UHE) cosmic particles, with energies exceeding 10 8 GeV …

The present white paper is submitted as part of the “Snowmass” process to help inform the
long-term plans of the United States Department of Energy and the National Science …

An overview of the multi-messenger capabilities of the Pierre Auger Observatory is
presented. The techniques and performance of searching for Ultra-High Energy neutrinos …

In order to interpret cosmic ray observations, detailed modeling of propagation effects
invoking all important messengers is necessary. We introduce a new photon production and …

On 2017 September 22, a through-going muon that deposited 23.7 TeV was detected at the
IceCube telescope (Aartsen et al. 2017) in Antarctica, likely to be produced by a neutrino …

The energy spectrum of cosmic rays extends to beyond 100EeV. Where and how these
particles, predominantly the nuclei of the common elements up to iron, are accelerated is …

With the first gravitational waves (GWs) measured by the Advanced LIGO and Virgo
detectors in 2015 (Abbott et al. 2016), a new window to the universe has been opened. In …

The Pierre Auger Observatory, being the largest air-shower experiment in the world, offers
an unprecedented exposure to neutral particles at the highest energies. Since the beginning …

We present constraints on the lifetime of the superheavy decaying dark matter branching to
the qq̅ channel in the mass range 10 19–10 25 eV based on the directional limits on the …

As ultra-high energy photons (EeV and beyond) propagate from their sources of production
to Earth, radiation-matter interactions can occur, leading to an effective screening of the …