Large spin-2 signals at the cosmological collider

A bstract We study the theory and phenomenology of massive spin-2 fields during inflation with nonzero background chemical potential, extend cosmological collider physics to tensor modes. identify a unique dimension-5 parity-violating potential operator for fields, which leads ghost-free linear propagating one scalar mode two The greatly boosts production even very heavy particles, thereby large distinct signals particles. show up at tree-level in both curvature trispectrum tensor-curvature mixed bispectrum.