Detecting dark matter (DM) relic via freeze-in is difficult in laboratories due to smallness of
the couplings involved. However, a non-standard cosmological history of the Universe, prior …

We examine the non-thermal production of dark matter in a scalar extended singlet doublet
fermion model where the lightest admixture of the fermions constitutes a suitable dark matter …

If coupled feebly to the Standard Model bath, dark matter can evade the severe constraints
from the direct search experiments. At the same time, such interactions help produce dark …

We propose a minimal model based on lepton number symmetry (and violation), to address
a common origin of baryon asymmetry, dark matter and neutrino mass generation. The …

We propose a novel framework where baryon asymmetry of the Universe can arise due to
forbidden decay of dark matter (DM) enabled by finite-temperature effects in the vicinity of a …

We propose a novel framework where baryon asymmetry can arise due to forbidden decay
of dark matter (DM) enabled by finite-temperature effects in the early Universe. In order to …

The connection between a hidden nonthermal sector and a thermal plasma can be
established by a light thermal fermion mediator. When the fermion mediator is much lighter …

A bstract We examine the singlet-doublet fermionic dark matter model, where the non-
thermal production of the dark matter in light of a non-standard cosmology demands a …

It is generically believed that the two-body scattering is suppressed by higher-order weak
couplings with respect to the two-body decay. We show that this does not always hold when …

A bstract We present a detailed study of the production of dark matter in the form of a sterile
neutrino via freeze-in from decays of heavy right-handed neutrinos. Our treatment accounts …