249 citations · 1.3k across the 28 of their papers we have counts for
9 papers · 1 filter
The Science of the Einstein Telescope
Adrian Abac, Raul Abramo, Simone Albanesi +485
Einstein Telescope (ET) is the European project for a gravitational-wave (GW) observatory of third-generation. In this paper we present a comprehensive discussion of its science ob…
Screening away the tension
Jose Beltran Jimenez, Dario Bettoni, Philippe Brax
This Essay explores consequences of a dark non-linear electromagnetic sector in a Universe with a net dark charge for matter. The cosmological dynamics can be described by a Lemaît…
Doppelgänger dark energy: modified gravity with non-universal couplings after GW170817
Luca Amendola, Dario Bettoni, Guillem Domènech +1
Gravitational Wave (GW) astronomy severely narrowed down the theoretical space for scalar-tensor theories. We propose a new class of attractor models for Horndeski action in which…
Speed of Gravitational Waves and the Fate of Scalar-Tensor Gravity
Dario Bettoni, Jose María Ezquiaga, Kurt Hinterbichler +1
The direct detection of gravitational waves (GWs) is an invaluable new tool to probe gravity and the nature of cosmic acceleration. A large class of scalar-tensor theories predict…
Dynamics of non-minimally coupled perfect fluids
Dario Bettoni, Stefano Liberati
We present a general formulation of the theory for a non-minimally coupled perfect fluid in which both conformal and disformal couplings are present. We discuss how such non-minima…
Shaken, not stirred: kinetic mixing in scalar-tensor theories of gravity
Dario Bettoni, Miguel Zumalacárregui
Kinetic mixing between the metric and scalar degrees of freedom is an essential ingredient in contemporary scalar-tensor theories. This often makes hard to understand their physica…
Disformal invariance of second order scalar-tensor theories
Dario Bettoni
The Horndeski action is the most general one involving a metric and a scalar field that leads to second-order field equations in four dimensions. Being the natural extension of the…
Disformal invariance of second order tensor-scalar theories: framing the Horndeski action
Dario Bettoni, Stefano Liberati
The Horndeski action is the most general one involving a metric and a scalar field that leads to second order field equations in four dimensions. Being the natural extension of the…
Extended LCDM: generalized non-minimal coupling for dark matter fluids
Dario Bettoni, Stefano Liberati, Lorenzo Sindoni
In this paper we discuss a class of models that address the issue of explaining the gravitational dynamics at the galactic scale starting from a geometric point of view. Instead of…