Gravitational waves (GWs) were recently detected for the first time. This revolutionary
discovery opens a new way of learning about particle physics through GWs from first-order …

We review the landscape of QCD axion models. Theoretical constructions that extend the
window for the axion mass and couplings beyond conventional regions are highlighted and …

What is the maximum possible strength of a first-order electroweak phase transition and the
resulting gravitational wave (GW) signal? While naively one might expect that supercooling …

We pave the way for future gravitational-wave detection experiments, such as the big bang
observer and DECIGO, to constraint dark sectors made of SU (N) Yang-Mills confined …

We derive efficiency factors for the production of gravitational waves through bubble
collisions and plasma-related sources in strong phase transitions, and find the conditions …

Cosmological first-order phase transitions (1stOPTs) are said to be strongly supercooled
when the nucleation temperature is much smaller than the critical temperature. These are …

A novel mechanism for the primordial black hole (PBH) production is proposed as a natural
and inevitable consequence of general first-order phase transitions without reference to …

We survey systematically the general parametrisations of particle-physics models for a first-
order phase transition in the early universe, including models with polynomial potentials …

We update predictions for the gravitational wave (GW) signal from a strongly supercooled
phase transition in an illustrative classically conformal U (1) B− L model. We implement∝ γ …

The standard model of hot big-bang cosmology requires initial conditions which are
problematic in two ways:(1) The early universe is assumed to be highly homogeneous, in …