After a decade and a half of research motivated by the accelerating universe, theory and
experiment have reached a certain level of maturity. The development of theoretical models …

In this review we present a thoroughly comprehensive survey of recent work on modified
theories of gravity and their cosmological consequences. Amongst other things, we cover …

We consider Galileon inflation in the Effective Field Theory (EFT) framework and examine
the possibility for PBH formation during slow roll (SR) to ultra slow roll (USR) transitions. We …

Massive gravity has seen a resurgence of interest due to recent progress which has
overcome its traditional problems, yielding an avenue for addressing important open …

This review is focused on tests of Einstein's theory of general relativity with gravitational
waves that are detectable by ground-based interferometers and pulsar-timing experiments …

We review some theoretical and phenomenological aspects of massive gravities in 4
dimensions. We start from the Fierz–Pauli theory with Lorentz-invariant mass terms and then …

We obtain the general cosmological evolution equations for a classically consistent theory of
bimetric gravity. Their analytic solutions are demonstrated to generically allow for a cosmic …

Standard Model, with its present precision, predicts the neutron β β-decay time τ _ SM=
878.7 ± 0.6 τ SM= 878.7±0.6 s which is perfectly compatible with the neutron lifetime …

A bstract We study cosmological perturbations for a ghost free massive gravity theory
formulated with a dynamical extra metric that is needed to massive deform GR. In this …

A bstract We study FRW homogeneous cosmological solutions in the bigravity extension of
the recently found ghost-free massive gravity. When the additional extra metric, needed to …