I will review the production of GWs by the anisotropic stresses of velocity and magnetic fields induced in a first-order phase transition. I will present analytical estimates and numerical simulations that address the production of gravitational waves by sound waves and by MHD turbulence, and show how such an observation by LISA could allow us to understand the nature of the electroweak phase...
The baryon asymmetry problem remains a crucial challenge in particle physics and cosmology. Electroweak baryogenesis, a leading mechanisms to produce the matter-antimatter asymmetry we observe today, requires an extension to the Standard Model to achieve a sufficiently strong first order phase transition.
Besides representing a target for several future-generation colliders, such Beyond the...
Future space-based interferometers, such as LISA, offer an unprecedented opportunity to detect signals from the stochastic gravitational wave background originating from a first-order phase transition at the electro-weak scale, when elementary particles become massive. The generation of masses can induce a softening of the equation of state of the cosmic fluid and thereby accelerate the...
SGWBinner is a primary tool to investigate the reconstruction of cosmological gravitational wave signals with LISA. Its algorithms are highly developed and most parts of the analysis can be done easily on a laptop, but the final MCMC part is still time consuming. To overcome this situation and accelerate the study of cosmological gravitational wave sources, we have accommodated the JAX...
Detecting stochastic gravitational wave backgrounds (SGWBs) with the Laser Interferometer Space Antenna (LISA) is one of the mission's scientific objectives. Disentangling SGWBs of astrophysical and cosmological origin is a challenging task, further complicated by the limited instrumental noise knowledge.
Various algorithms for simultaneous fit of noise and signal exist in literature,...
The anisotropies of stochastic gravitational wave backgrounds (SGWB) of both cosmological and astrophysical origin retain precious information on the geometry and the content of the Universe at early times.
In this talk we present some test of statistical isotropy which can be conducted by observations of SGWB alone and in cross-correlation with other cosmological observables, such as the...
We present results of gravitational backreaction applied to a realistic population of cosmic strings. Backreaction smooths strings and reduces the rate of energy loss, $\Gamma$. This smoothing does not give rise to strong cusps, with cusp-like behavior subdominant until at least modes $n\sim 10^6$. Backreaction generally causes strings to self-intersect, but the intersections typically involve...
Gravitational waves (GWs) from compact binary coalescences are standard sirens that can probe the cosmic expansion history of the late-time Universe if the source redshift is known. Methods for injecting redshift information into the inference process range from the direct detection of electromagnetic counterparts ("bright sirens") to the use of statistical properties inferred either from a...
The prospect of primordial gravitational waves (GW) offers a promising new window for inflationary cosmology and particle physics. In our study 2309.08530, we investigated the evolution of the potential of a minimal scalar BSM extension at the end of inflation. More specifically, we focused on the transition from the potential-dominated de Sitter epoch to the kinetic dominated period of...
Despite the tremendous success of the Standard Model (SM) with its properties remarkably well measured, there is overwhelming phenomenological evidence that strongly suggests the need for physics beyond the current SM, such as explanations for dark matter and neutrino masses. In this presentation we will discuss LISA's potential to reveal further evidence of new physics phenomena through...
