Outputs (2)

Soft theorems for boostless amplitudes (2024)
Journal Article
Du, Z.-Z., & Stefanyszyn, D. (2024). Soft theorems for boostless amplitudes. Journal of High Energy Physics, 2024(7), Article 11. https://doi.org/10.1007/jhep07%282024%29011

We consider effective field theories (EFTs) of scalar fields with broken Lorentz boosts, which arise by taking the decoupling and flat-space limits of the EFT of inflation, and derive constraints that must be satisfied by the corresponding scattering... Read More about Soft theorems for boostless amplitudes.

Cosmological correlators through the looking glass: reality, parity, and factorisation (2024)
Journal Article
Stefanyszyn, D., Tong, X., & Zhu, Y. (2024). Cosmological correlators through the looking glass: reality, parity, and factorisation. Journal of High Energy Physics, 2024, Article 196. https://doi.org/10.1007/jhep05%282024%29196

We consider the evolution of quantum fields during inflation, and show that the total-energy singularities appearing in the perturbative expansion of the late-time Wavefunction of the Universe are purely real when the external states are massless sca... Read More about Cosmological correlators through the looking glass: reality, parity, and factorisation.