Abstract
We show how minimally-coupled matter fields of arbitrary spin, when coupled to Ricci-based gravity theories, develop non-trivial effective interactions that can be treated perturbatively only below a characteristic high-energy scale Lambda _{Q}. We then use this interactions to set bounds on the high-energy scale Lambda _{Q} that controls departures of Ricci-Based Gravity theories from General Relativity. Particularly, for Eddington-inspired Born-Infeld gravity we obtain the strong bound |kappa |<10^{-26} text {m}^5 text {kg}^{-1}text {s}^{-2} .
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