198 citations · 572 across the 22 of their papers we have counts for
8 papers · 1 filter
High-Energy Neutrinos from Black Hole Evaporation in Neutron Stars
Ioannis Dalianis
We investigate the production of high-energy neutrinos from microscopic black holes formed through the gravitational collapse of asymmetric dark matter accumulated inside neutron s…
Freeze-in baryogenesis and early matter domination
Ioannis Dalianis, Andreas Goudelis, Dimitrios Karamitros +2
The freeze-in mechanism has been shown to allow the simultaneous generation of cosmic dark matter and a viable matter-antimatter asymmetry in the universe. When the underlying inte…
Probing the BSM physics with CMB precision cosmology: an application to supersymmetry
Ioannis Dalianis, Yuki Watanabe
The cosmic history before the BBN is highly determined by the physics that operates beyond the Standard Model (BSM) of particle physics and it is poorly constrained observationally…
Suppressing gravitino thermal production with a temperature-dependent messenger coupling
Marcin Badziak, Ioannis Dalianis, Zygmunt Lalak
We show that the constraints on GMSB theories from the gravitino cosmology can be significantly relaxed if the messenger-spurion coupling is temperature dependent. We demonstrate t…
Cosmological aspects of gauge mediated supersymmetry breakdown
Ioannis Dalianis
In this thesis, we study the details of some fundamental cosmological problems of the gauge mediated supersymmetry breakdown and we probe the supersymmetry breaking sector by cosmo…
R-Symmetry and Gravitino Abundance
Ioannis Dalianis
Supersymmetry breaking sectors generically have an approximate global U(1) -symmetry. Thermal effects tend to restore the -symmetry in the reheated early universe. We revisit…