Large-field inflation and the cosmological collider

The authors study the signature of heavy spectator fields (``cosmological collider signal'') that couple to the inflaton for the case of large-field inflation with order M₏₋₀₍₊ excursion of the inflaton. Motivated by the so-called swampland distance conjecture, they consider exponentially time-dependent masses and show that the resulting scale dependence of the bispectrum can be an informative probe for general properties of different classes of inflation.