123 citations · 466 across the 30 of their papers we have counts for
27 papers · 1 filter
Dynamical evolution of the pressure on the bubble wall
Benoit Laurent, Miguel Vanvlasselaer
First-order phase transitions in the early Universe are pivotal for gravitational wave production, baryogenesis, and dark matter generation. A central question is whether bubble wa…
Spontaneous Baryogenesis from Axions on Induced Electroweak Walls
Miguel Vanvlasselaer, Wen Yin
We propose a baryogenesis mechanism in which an electroweak phase boundary is induced by a wall-like configuration of a scalar field, such as a domain wall or a shock wave, coupled…
Baryogenesis from Exploding Primordial Black Holes
Alexandra P. Klipfel, Miguel Vanvlasselaer, Sokratis Trifinopoulos +1
Exploding primordial black holes can source baryon asymmetry soon after the electroweak phase transition, as high-energy Hawking radiation drives ultrarelativistic shocks in the su…
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…
Gravitational waves from the sound shell model: direct and inverse phase transitions in the early Universe
Giulio Barni, Simone Blasi, Eric Madge +1
Cosmological phase transitions are a frequent phenomenon in particle physics models beyond the Standard Model, and the corresponding gravitational wave signal offers a key probe of…
CP-violation in production of heavy neutrinos from bubble collisions
Martina Cataldi, Kristjan Müürsepp, Miguel Vanvlasselaer
First order phase transitions (FOPT) in the early Universe can be powerful emitters of both relativistic and heavy particles, upon the collision of ultra-relativistic bubble shells…
Bubble wall dynamics from nonequilibrium quantum field theory
Wen-Yuan Ai, Matthias Carosi, Bjorn Garbrecht +2
We derive the coupled dynamics between the bubble wall and the plasma from first principles using nonequilibrium quantum field theory. The commonly used equation of motion of the b…
Inverse bubbles from broken supersymmetry
Giulio Barni, Simone Blasi, Miguel Vanvlasselaer
Building upon the recent findings regarding inverse phase transitions in the early universe, we present the first natural realisation of this phenomenon within a supersymmetry-brea…
DW-genesis: generating the baryon number from domain walls
Miguel Vanvlasselaer
We show that axionic domain walls, when they couple to the lepton number, can generate a net baryon and lepton number through the mechanism of spontaneous baryogenesis. We study sy…
Populating dark sectors with relativistic bubble walls
Miguel Vanvlasselaer
In this talk, we present a mechanism of Dark Matter production during first order phase transitions and happening via the collision of the bubble wall and plasma quanta. We will fi…
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…
Photo-production of axions and neutrinos in compact objects
Miguel Vanvlasselaer
Compact stellar objects like supernovae and neutron stars cool by the emission of light particles like neutrinos and axions from their very dense interiors. In this article, we stu…
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…
Populating secluded dark sector with ultra-relativistic bubbles
Aleksandr Azatov, Xander Nagels, Miguel Vanvlasselaer +1
We study Dark Matter production during first order phase transitions from bubble-plasma collisions. We focus on scenarios where the Dark Matter sector is secluded and its interacti…
The hydrodynamics of inverse phase transitions
Giulio Barni, Simone Blasi, Miguel Vanvlasselaer
First order phase transitions are violent phenomena that occur when the state of the universe evolves abruptly from one vacuum to another. A \emph{direct} phase transition connects…
Photo-production of axions in Supernovae
Sabyasachi Chakraborty, Aritra Gupta, Miguel Vanvlasselaer
Compact stellar objects like supernovae and neutron stars are believed to cool by emitting axions predominantly via axion bremsstrahlung (), pion conversion ($π^- p^+ \…
Baryogenesis and leptogenesis with relativistic bubble walls
Miguel Vanvlasselaer
In this talk, we study the impact of first order phase transitions with fast bubble walls on mechanisms of leptogenesis and baryogenesis. We begin our exploration with the usual le…
Criterion for ultra-fast bubble walls: the impact of hydrodynamic obstruction
Wen-Yuan Ai, Xander Nagels, Miguel Vanvlasselaer
The Bödeker-Moore thermal friction is usually used to determine whether or not a bubble wall can run away. However, the friction on the wall is not necessarily a monotonous functio…
Quantisation Across Bubble Walls and Friction
Aleksandr Azatov, Giulio Barni, Rudin Petrossian-Byrne +1
We quantise from first principles field theories living on the background of a bubble wall in the planar limit with particular focus on the case of spontaneous breaking of gauge sy…
Anomaly induced cooling of Neutron Stars: A Standard Model contribution
Sabyasachi Chakraborty, Aritra Gupta, Miguel Vanvlasselaer
Young neutron stars cool via the emission of neutrinos from their core. A precise understanding of all the different processes producing neutrinos in the hot and degenerate matter…
Bubble-assisted Leptogenesis
Eung Jin Chun, Tomasz P. Dutka, Tae Hyun Jung +2
We explore the possibility of embedding thermal leptogenesis within a first-order phase transition (FOPT) such that RHNs remain massless until a FOPT arises. Their sudden and viole…
Attracting the Electroweak Scale to a Tachyonic Trap
Sokratis Trifinopoulos, Miguel Vanvlasselaer
We propose a new mechanism to dynamically select the electroweak scale during inflation. An axion-like field that couples quadratically to the Higgs with a large initial veloci…
Ultra-relativistic bubbles from the simplest Higgs portal and their cosmological consequences
Aleksandr Azatov, Giulio Barni, Sabyasachi Chakraborty +2
We analyze the phase transitions in the minimal extension of the SM with a real singlet scalar field. The novelty of our study is that we identify and analyze in details the region…
Baryogenesis via relativistic bubble walls
Aleksandr Azatov, Miguel Vanvlasselaer, Wen Yin
We present a novel mechanism which leads to the baryon asymmetry generation during the strong first order phase transition. If the bubble wall propagates with ultra-relativistic ve…