Abstract The Laser Interferometer Space Antenna (LISA) has two scientific objectives of
cosmological focus: to probe the expansion rate of the universe, and to understand …

A bstract Gravitational waves (GWs) from strong first-order phase transitions (SFOPTs) in the
early Universe are a prime target for upcoming GW experiments. In this paper, I construct …

Abstract Several Pulsar Timing Array (PTA) Collaborations have recently provided strong
evidence for a nHz Stochastic Gravitational-Wave Background (SGWB). Here we investigate …

Recent pulsar timing data reported by the NANOGrav collaboration may indicate the
existence of a stochastic gravitational wave background around f∼ 10− 8 Hz. We explore a …

The hierarchy between the mass of the Higgs boson and larger mass scales becomes ever
more puzzling as experiments push to higher energies. Neutral naturalness is the umbrella …

A bstract Many models of physics beyond the Standard Model predict a strong first-order
phase transition (SFOPT) in the early Universe that leads to observable gravitational waves …

The coherent oscillation of axionic fields naturally drives copious production of dark photon
particles in the early Universe, due to resonance and tachyonic enhancement. During the …

A bstract We analyse the gravitational wave and low energy signatures of a Pati-Salam
phase transition. For a Pati-Salam scale of M PS∼ 10 5 GeV, we find a stochastic power …

A bstract We explore the possibility of discovering the mirror baryons and electrons of the
Mirror Twin Higgs model in direct detection experiments, in a scenario in which these …

We investigate the sensitivity of future space-based interferometers such as LISA and
DECIGO to the parameters of new particle physics models which drive a first-order phase …