We revisit constraints on decaying very heavy dark matter (VHDM) using the latest ultrahigh-
energy cosmic-ray (UHECR; E≳ 10 18 eV) data and ultrahigh-energy (UHE) γ-ray flux upper …

In 15 years of data taking, the Pierre Auger Observatory has observed no events beyond 1 0
11.3 GeV. This null result translates into an upper bound on the flux of ultrahigh-energy …

We consider decaying dark matter with masses 1 0 7≲ M≲ 1 0 16 GeV as a source of
ultrahigh energy (UHE) gamma rays. Using recent limits on UHE gamma-ray flux for …

At any epoch, particle physics must be open to completely unexpected discoveries, and that
is reason enough to extend the reach of searches for ultra-high energy (UHE) photons. The …

Superheavy particles are a natural candidate for the dark matter in the universe and our
galaxy, because they are produced generically during inflation in cosmologically interesting …

Decay or annihilation products of superheavy dark matter (SHDM) could be responsible for
the end of the ultra-high energy cosmic ray (UHECR) spectrum. In this case, the south array …

Super heavy quasi-stable particles are naturally produced in the early universe and could
represent a substantial fraction of the dark matter: the so-called super heavy dark matter …

We consider multi-messenger constraints on very heavy dark matter (VHDM) from recent
Fermi gamma-ray and IceCube neutrino observations of isotropic background radiation …

The announcement by BICEP2 of the detection of B-mode polarization consistent with
primordial gravitational waves with a tensor-to-scalar ratio, r= 0.2+ 0.07− 0.05, challenged …

For decades, searches for electroweak-scale dark matter (DM) have been performed without
a definitive detection. This lack of success may hint that DM searches have focused on the …