The exploration of the universe has recently entered a new era thanks to the multi-
messenger paradigm, characterized by a continuous increase in the quantity and quality of …

The propagation of gamma-rays over cosmological distances is the subject of extensive
theoretical and observational research at GeV and TeV energies. The mean free path of …

On 9 October 2022, the Large High Altitude Air Shower Observatory (LHAASO) reported the
observation of the very early TeV afterglow of the brightest-of-all-time gamma-ray burst …

Tau neutrinos are the least studied particle in the standard model. This whitepaper
discusses the current and expected upcoming status of tau neutrino physics with attention to …

The coincident detection of GW170817 in gravitational waves and electromagnetic radiation
spanning the radio to MeV gamma-ray bands provided the first direct evidence that short …

Planck scale modified dispersion relations are one way to capture the influence of quantum
gravity on the propagation of fundamental point particles effectively. We derive the time …

As a basic symmetry of space-time, Lorentz symmetry has played important roles in various
fields of physics, and it is a glamorous question whether Lorentz symmetry breaks. Since …

The last three decades have witnessed the surge of quantum gravity phenomenology in the
ultraviolet regime as exemplified by the Planck-scale accuracy of time-delay measurements …

Nonlinear electrodynamic models are reassessed in this paper to pursue an investigation of
the kinematics of the Compton effect in a magnetic background. Before considering specific …

The spectral lags of gamma-ray bursts (GRBs) have been viewed as the most promising
probes of the possible violations of Lorentz invariance (LIV). However, these constraints …