Lattice simulations of gravitational waves from non-abelian gauge fields at a tachyonic transition
The detection of gravitational waves (GWs) has raised interest in cosmology and particle physics as they can reveal unique information about the early universe, and new experiments to detect them, like LISA and DECIGO, will take place in the future. In the meantime numerical simulations are needed to compute the spectrum and strength of the gravitational wave signal from various scenarios. In this study, we use real time, non-equilibrium, classical lattice simulations to study the dynamics of a tachyonic transition for a scalar field coupled to an SU(2) non-abelian gauge field. We present the gravitational wave production from non-abelian gauge fields for the first time, and we find that that although the peak magnitude of the spectrum increases when adding gauge fields (relative to a scalar-only theory), the signal in the infrared is also modified.
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Physics Beyond the Standard Model