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hep-th2026
EFT Perspective On de-Sitter S-Matrix
Sayantan Choudhury
Non-perturbative limitations on low-energy effective field theories (EFTs) based on the characteristics of high-energy theory are provided by the analyticity of the flat-space vers…
hep-th2025
Notes On de-Sitter Mellin Barnes Amplitudes
Sayantan Choudhury
In this paper, we create a Mellin space method for boundary correlation functions in de Sitter (dS) and anti-de Sitter (AdS) spaces. We demonstrate that the analytic continuation b…
hep-th2025★ 1 cited
Mass gap in non-perturbative quadratic gravity via Dyson-Schwinger
Sayantan Choudhury, Marco Frasca, Anish Ghoshal
We apply in a simple model derived from quadratic gravity the technique of Dyson-Schwinger equations to solve for its corresponding quantum theory. Particularly, we…