234 citations · 237 across the 3 of their papers we have counts for
3 papers
hep-th2024★ 1 cited
A de Sitter S-matrix from amputated cosmological correlators
Scott Melville, Guilherme L. Pimentel
Extending scattering to states with unphysical mass values (particles ``off their mass shell'') has been instrumental in developing modern amplitude technology for Minkowski spacet…
hep-th2023★ 2 cited
A de Sitter -matrix for the masses
Scott Melville, Guilherme L. Pimentel
We define an -matrix for massive scalar fields on a fixed de Sitter spacetime, in the expanding patch co-ordinates relevant for early Universe cosmology. It enjoys many of the s…
hep-th2016★ 234 cited
Non-Gaussianity as a Particle Detector
Hayden Lee, Daniel Baumann, Guilherme L. Pimentel
We study the imprints of massive particles with spin on cosmological correlators. Using the framework of the effective field theory of inflation, we classify the couplings of these…