Abstract The Telescope Array Collaboration recently reported the detection of a cosmic-ray
particle," Amaterasu," with an extremely high energy of 2.4× 10 20 eV. Here we investigate …

We use a new method to estimate the injected mass composition of ultrahigh cosmic rays
(UHECRs) at energies higher than 10 EeV. The method is based on comparison of the …

Abstract Recently the Telescope Array collaboration reported an observation of cosmic ray
event with very high energy 244 EeV (2.44× 10 20 eV). Importantly, the event is hard to …

We propose the ultra high energy cosmic ray recently detected by Telescope Array to be the
electroweak monopole, and present theoretical arguments which support this. This strongly …

Inflationary observables of a classically scale invariant model, in which the origin of the
Planck mass and the electroweak scale including the right-handed neutrino mass is chiral …

We report an estimation of the injected mass composition of ultrahigh energy cosmic rays
(UHECRs) at energies higher than 10 EeV. The composition is inferred from an energy …

Context. Various high-energy phenomena in the Universe are associated with blazars,
which are powerful active galaxies with jets pointing at the observer. Novel results relating …

We provide a comprehensive analysis of the acceleration of magnetic monopoles in
intergalactic magnetic fields. We demonstrate that monopoles with intermediate to low …

Black hole superradiance has proven being very valuable in several realms of gravitational
physics, and holds a promising discovery potential. In this paper, we show how it can sheed …

We discuss the possibility that a dominant fraction of the cosmic rays above the ankle is due
to a single nearby source, considering in particular the radio galaxy Centaurus A. We focus …