Cosmological phase transitions: From perturbative particle physics to gravitational waves

P Athron, C Balázs, A Fowlie, L Morris, L Wu - Progress in Particle and …, 2023 - Elsevier
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 …

Quantisation across bubble walls and friction

A Azatov, G Barni, R Petrossian-Byrne… - Journal of High Energy …, 2024 - Springer
A bstract 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 …

[HTML][HTML] Gravitational waves from composite dark sectors

R Pasechnik, M Reichert, F Sannino… - Journal of High Energy …, 2024 - Springer
A bstract We study under which conditions a first-order phase transition in a composite dark
sector can yield an observable stochastic gravitational-wave signal. To this end, we employ …

Bubble wall velocities with an extended fluid Ansatz

GC Dorsch, DA Pinto - Journal of Cosmology and Astroparticle …, 2024 - iopscience.iop.org
We compute the terminal bubble wall velocity during a cosmological phase transition by
modelling non-equilibrium effects in the plasma with the so-called" extended fluid Ansatz". A …

Impact of theoretical uncertainties on model parameter reconstruction from GW signals sourced by cosmological phase transitions

M Lewicki, M Merchand, L Sagunski, P Schicho… - Physical Review D, 2024 - APS
Different computational techniques for cosmological phase transition parameters can impact
the gravitational wave (GW) spectra predicted in a given particle physics model. To …

[HTML][HTML] First shot of the smoking gun: probing the electroweak phase transition in the 2HDM with novel searches for A → ZH in and final states

T Biekötter, S Heinemeyer, JM No… - Journal of High Energy …, 2024 - Springer
A bstract Recently the ATLAS collaboration has reported the first results of searches for
heavy scalar resonances decaying into a Z boson and a lighter new scalar resonance …

Logarithmically divergent friction on ultrarelativistic bubble walls

WY Ai - Journal of Cosmology and Astroparticle Physics, 2023 - iopscience.iop.org
We calculate the friction experienced by ultrarelativistic bubble walls resulting from the 1→ 2
light-to-heavy transition process, with finite-wall-width effects fully taken into account. In this …

Primordial black holes from slow phase transitions: a model-building perspective

S Kanemura, M Tanaka, KP Xie - Journal of High Energy Physics, 2024 - Springer
A bstract We investigate the formation of primordial black holes (PBHs) through delayed
vacuum decay during slow cosmic first-order phase transitions. Two specific models, the …

[HTML][HTML] Naturally small neutrino mass with asymptotic safety and gravitational-wave signatures

A Chikkaballi, K Kowalska, EM Sessolo - Journal of High Energy Physics, 2023 - Springer
A bstract We revisit the dynamical generation of an arbitrarily small neutrino Yukawa
coupling in the Standard Model with trans-Planckian asymptotic safety and apply the same …

Primordial magnetogenesis in the two-Higgs-doublet model

MO Olea-Romacho - Physical Review D, 2024 - APS
γ-ray emission of blazars infer the presence of large-scale magnetic fields in the intergalactic
medium, but their origin remains a mystery. Using recent data from MAGIC, HESS, and …