2025/11/02 by Shuo Guan, Guan, Shuo, Huai-Ke Guo +9 · 3 citations
Physics and Astronomy · #Bayesian inference #Cosmology and Gravitation Theories #Electroweak interaction #Gravitation #Gravitational wave #Gravitational wave background #Higgs boson #Measure (data warehouse) #Particle physics theoretical and experimental studies #Phase (matter) #Pulsars and Gravitational Waves Research #Quantum Chromodynamics and Particle Interactions #Quartic function #Spectrum (functional analysis)
paper · pdf · doi:10.1103/2xy8-9y1r
openalex publication_date 2026/01/28 · openalex created_date 2026/01/29 · openalex updated_date 2026/05/21
In this work, we demonstrate the complete process of using space-based gravitational wave detectors to measure properties of the stochastic gravitational wave background arising from a first-order electroweak phase transition. Based on frequency-domain simulations of the Taiji mission, including instrumental noise and astrophysical foregrounds, we perform parameter inference using both the Fisher information matrix and Bayesian Markov Chain Monte Carlo sampling. We show how the reconstructed spectrum constrains the macroscopic parameters of the phase transition, and further how these constraints map onto the underlying particle-physics parameters in a singlet-extended Standard Model. Our results demonstrate that the Higgs cubic and quartic self-couplings can be significantly constrained using gravitational wave observations, despite limitations arising from parameter degeneracy.