97 citations · 126 across the 7 of their papers we have counts for
8 papers · 1 filter
Metastable strings at PTAs: classical stability analysis
Simone Blasi, Maxime Grandjean, Alberto Mariotti
Metastable strings can arise from a two-step symmetry breaking chain of the type .They can decay through quantum tunneling by nucleating a monopole-antimonopo…
Domain walls in the scaling regime: Equal Time Correlator and Gravitational Waves
Simone Blasi, Alberto Mariotti, Aäron Rase +1
Domain walls are topological defects that may have formed in the early Universe through the spontaneous breakdown of discrete symmetries, and can be a strong source of gravitationa…
DW-genesis: baryon number from domain wall network collapse
Alberto Mariotti, Xander Nagels, Aäron Rase +1
Axionic domain walls, as they move through the early universe plasma during their collapse, can generate a net baryon and lepton number through the mechanism of spontaneous baryoge…
Gravitational waves from cosmic strings in Froggatt-Nielsen flavour models
Simone Blasi, Lorenzo Calibbi, Alberto Mariotti +1
Gravitational waves (GW) are a powerful probe of the earliest moments in the Universe, enabling us to test fundamental interactions at energy scales beyond the reach of laboratory…
ALP leptogenesis
Martina Cataldi, Alberto Mariotti, Filippo Sala +1
We propose a novel realisation of leptogenesis that relies on the out-of-equilibrium decay of an axion-like particle (ALP) into right-handed Majorana neutrinos (RHNs) in the early…
QCD Axion Strings or Seeds?
Simone Blasi, Alberto Mariotti
We study the impact of QCD axion strings in the cosmological history of electroweak (EW) symmetry breaking, focussing on the minimal KSVZ axion model. We consider the case of the p…
Electroweak Phase Transition with a Double Well Done Doubly Well
Prateek Agrawal, Simone Blasi, Alberto Mariotti +1
We revisit the electroweak phase transition in the scalar singlet extension of the standard model with a symmetry. In significant parts of the parameter space the ph…
Top-philic ALP phenomenology at the LHC: the elusive mass-window
Simone Blasi, Fabio Maltoni, Alberto Mariotti +3
We study the LHC phenomenology of an Axion Like Particle (ALP) that couples only derivatively with the top quark at tree level. We inspect the radiatively induced couplings with th…