The Cosmological Bootstrap: Spinning Correlators from Symmetries and Factorization

Understand

We extend the cosmological bootstrap to correlators involving massless particles with spin.

• In de Sitter space, these correlators are constrained both by symmetries and by locality.
• In particular, the de Sitter isometries become conformal symmetries on the future boundary of the spacetime, which are reflected in a set of Ward identities that the boundary correlators must satisfy.
• We solve these Ward identities by acting with weight-shifting operators on scalar seed solutions.