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The cosmological collider provides a model-independent probe of particlephysics during inflation. We extend the study of cosmological collider physicsto much smaller scales through gravitational wave (GW) probes. With aChern-Simons interaction, a massive vector field can obtain a chemicalpotential and its particle production can cause significant non-Gaussian GWsignals. We calculate the mass and spin dependences of the induced GW 3-pointcorrelation function in the squeezed limit, and estimate its amplitude. Suchsignals may be detectable in the current and upcoming GW interferometerexperiments.

Cosmological Collider Signatures of Massive Vectors from Non-Gaussian Gravitational Waves