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Author

David Stefanyszyn

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Preprint Oct 2026

General Spin-1 Dynamics During Inflation: Microcausality Constraints and Cosmological Collider Signals

We construct the general theory of a spin-1 field propagating on an inflationary background consistent with scale invariance, rotations, Bunch-Davies conditions and microcausality. Our Boostless Proca theory generalises the usual massive Proca theory to a Lagrangian with 5 free parameters: 4 corresponding to parity-eve...

Trevor Cheung, Carlos Duaso Pueyo, David Stefanyszyn et al. · 0 citations

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