Abstract The Einstein Telescope (ET), the European project for a third-generation
gravitational-wave detector, has a reference configuration based on a triangular shape …

A bstract We consider asymptotic observables in quantum field theories in which the S-
matrix makes sense. We argue that in addition to scattering amplitudes, a whole …

First-order phase transitions, which take place when the symmetries are predominantly
broken (and masses are then generated) through radiative corrections, produce observable …

Gravitational-wave observations by the laser interferometer gravitational-wave observatory
(LIGO) and Virgo have provided us a new tool to explore the Universe on all scales from …

In the absence of numerous gravitational-wave detections with confirmed electromagnetic
counterparts, the" dark siren" method has emerged as a leading technique of gravitational …

The first detection of a binary neutron star merger through gravitational waves and photons
marked the dawn of multimessenger astronomy with gravitational waves, and it greatly …

We investigate the synergy of upcoming galaxy surveys and gravitational wave (GW)
experiments in constraining late-time cosmology, examining the cross-correlations between …

A bstract We present the conservative effective two-body Hamiltonian at the third order in the
post-Newtonian expansion with gravitoelectric quadrupolar dynamical tidal-interactions. Our …

Positivity bounds—constraints on any low-energy effective field theory imposed by the
fundamental axioms of unitarity, causality and locality in the UV—have recently been used to …

Abstract The Effective Field Theory (EFT) of perturbations on an arbitrary background
geometry with a timelike scalar profile was recently constructed in the context of scalar …