6 papers
Probing cosmological phase transitions with SKAO through nano-Hz gravitational-wave portal
Roman Pasechnik, António P. Morais
The recent evidence for a stochastic gravitational wave (GW) background at nano-Hz frequencies from pulsar timing arrays (PTAs) provides a strong science case for exploring cosmolo…
Prominence: A discriminator of gravitational wave signals
João Gonçalves, Danny Marfatia, António P. Morais
The concept of prominence is familiar to signal engineers, topographers and mountaineers. We introduce Prominence as a discriminator of gravitational wave (GW) signals. We…
Machine Learning for Multi-messenger Probes of New Physics and Cosmology: A Review and Perspective
Andrea Addazi, Konstantin Belotsky, Vitaly Beylin +18
The multi-messenger exploration of dark matter and physics beyond the Standard Model has emerged as a central direction in modern astro-particle physics, particularly following the…
PT2GWFinder: A Package for Cosmological First-Order Phase Transitions and Gravitational Waves
Vedran Brdar, Marco Finetti, Marco Matteini +2
The detection of gravitational waves from binary black hole and neutron star mergers by ground-based interferometers, as well as the evidence for a gravitational wave background fr…
Sterile neutrino dark matter in conformal Majoron models
João Gonçalves, Danny Marfatia, António P. Morais +2
We study sterile neutrino dark matter (DM) in a classically conformal U(1)' extension of the Standard Model with three right-handed neutrinos and a Majoron-like singlet scalar that…
Gravitational Waves from Dark Gauge Sectors
Alexander Belyaev, Mårten Bertenstam, João Gonçalves +3
We explore gravitational-wave (GW) signatures from a strong first-order phase transition in a non-Abelian dark sector, which naturally gives rise to vector dark matter (DM). We con…