Signatures of the inflationary particle content: massive spin-2 fields

We study the imprints of a massive spin-2 field on inflationary observables. We show that a well known consistency relation for single-field slow roll inflation is violated in this setup, where the minimal inflationary field content interacts with the massive spin-2 field through deRham-Gabadadze-Tolley interactions. The unitarity requirement on spinning particles, known as Higuchi bound, plays a crucial role on the amount of violation of the consistency relation and therefore on the size of the observable signal.