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 …

We review recent progress in massive gravity. We start by showing how different theories of
massive gravity emerge from a higher-dimensional theory of general relativity, leading to the …

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 …

We introduce a new class of scalar-tensor theories that extend Horndeski, or" generalized
galileon", models. Despite possessing equations of motion of higher order in derivatives, we …

A bstract Generically, non-linear bimetric theories of gravity suffer from the same Boulware-
Deser ghost instability as non-linear theories of massive gravity. However, recently …

We have recently proposed a new class of gravitational scalar-tensor theories free from
Ostrogradski instabilities, in ref.[1]. As they generalize Horndeski theories, or" generalized" …

A bstract Single top-quark production in association with a Z boson, where the Z boson
decays to a pair of charged leptons, is measured in the trilepton channel. The proton-proton …

A bstract Theories of massive gravity inevitably include an auxiliary reference metric.
Generically, they also contain an inconsistency known as the Boulware-Deser ghost …

A bstract In massive gravity and in bimetric theories of gravity, two constraints are needed to
eliminate the two phase-space degrees of freedom of the Boulware-Deser ghost. For …

General relativity has passed all solar system experiments and neutron star based tests,
such as binary pulsar observations, with flying colors. A more exotic arena for testing …