3 papers
hep-th2025
Perturbative corrections to soft photon theorems for massless scalar QED in de Sitter spacetime
Pratik Chattopadhyay
The perturbative corrections to soft photon theorems with massive scalars in de Sitter spacetime were computed in [JHEP10(2023)055]. However, the massless limit of the scalar modes…
hep-th2025
de Sitter corrections to supertranslation Ward identity and soft graviton theorem
Pratik Chattopadhyay, Divyesh N. Solanki
We study the tree-level scattering of massless scalars followed by an emission of a soft graviton in the small compact region inside the static patch in de Sitter space. We derive…
hep-th2025
Perturbative soft graviton theorems in de Sitter spacetime
Divyesh N. Solanki, Pratik Chattopadhyay, Srijit Bhattacharjee
We consider soft graviton scattering for a theory where Einstein's gravity is minimally coupled to a scalar field in the presence of a cosmological constant, i.e. in a background d…