The Hubble tension has now grown to a level of significance which can no longer be
ignored and calls for a solution which, despite a huge number of attempts, has so far eluded …

It has recently been argued that the Hubble tension may call for a combination of both pre-
and post-recombination new physics. Motivated by these considerations, we provide one of …

We generalize the recently proposed Stepped Partially Acoustic Dark Matter (SPartAcous)
model by including additional massless degrees of freedom in the dark radiation sector. We …

We explore the potential of precision cosmological data to study non-minimal dark sectors
by updating the cosmological constraint on the mirror twin Higgs model (MTH). The MTH …

Light dark fermions can mass mix with the standard model (SM) neutrinos. As a result,
through oscillations and scattering, they can equilibrate in the early universe. Interactions of …

The Hubble tension is inherently multidimensional, and bears important implications for
parameters beyond $ H_0 $. We discuss the key role of the matter density parameter …

Why does dark matter (DM) live longer than the age of the Universe? Here we study a novel
sub-eV scalar DM candidate whose stability is due to the Pauli exclusion of its fermionic …

In this work, we study the previously unexplored resonant region of neutrino self-
interactions. Current disagreement on late and early time observations of the Universe …

A phase shift in the acoustic oscillations of cosmic microwave background (CMB) spectra is
a characteristic signature for the presence of non-photon radiation propagating differently …

We propose a novel and comprehensive particle physics framework that addresses multiple
cosmological tensions observed in recent measurements of the Hubble parameter, S 8, and …