Probing baryogenesis with gravitational waves

Affleck-Dine (AD) baryogenesis is compelling yet challenging to probe because of the high-energy physics involved. We demonstrate that this mechanism can be generically realized with low-energy new physics, without supersymmetry, while producing detectable gravitational waves (GWs) sourced by the parametric resonance of a light scalar field. In viable models, the scalar has a mass of $\mathcal{O}(0.1-10)$ GeV, yielding GWs with peak frequencies of $\mathcal{O}(10-100)$ Hz. This study further reveals a new complementarity between upcoming LIGO-frequency GW detectors and laboratory searches across frontiers of particle physics.

💡 Research Summary

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The paper presents a novel, non‑supersymmetric realization of Affleck‑Dine (AD) baryogenesis that can operate at energies far below the electroweak scale and simultaneously generate a stochastic gravitational‑wave background (SGWB) observable by upcoming LIGO‑band detectors. The authors introduce a complex scalar field Φ, a Standard‑Model gauge singlet, with a simple renormalizable potential
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