EFT of Interacting Spin-2 Fields

Understand

We consider the effective field theory of multiple interacting massive spin-2 fields.

• We focus on the case where the interactions are chosen so that the cutoff is the highest possible, and highlight two distinct classes of theories.
• In the first class, the mass eigenstates only interact through potential operators that carry no derivatives in unitary gauge at leading order.
• In the second class, a specific kinetic mixing between the mass eigenstates is included non-linearly.