3 papers
hep-th2025
Schwinger-Keldysh Cosmological Cutting Rules
Francisco Colipí-Marchant, Gabriel Marin, Gonzalo A. Palma +1
In this work, we study the realisation of unitarity-based cutting rules for primordial cosmological correlators computed within the Schwinger-Keldysh path integral formalism. While…
hep-th2025
Celestial closed strings at one-loop
Anthonny F. Canazas Garay, Gaston Giribet, Yoel Parra-Cisterna +1
In this paper we continue our investigation of superstring scattering amplitudes in the conformal basis. We focus on the case of four graviton scattering processes at 1-loop in \em…
hep-th2024
Celestial strings: field theory, conformally soft limits, and mapping the worldsheet onto the celestial sphere
Lina Castiblanco, Gaston Giribet, Gabriel Marin +1
We compute the celestial correlators corresponding to tree-level 5-gluon amplitudes in the type I superstring theory. Since celestial correlation functions are obtained by integrat…