TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhys.18.6.176
TI  - Cosmological infrared subtractions & infrared-safe computables
PY  - 2025/06/04
UR  - https://scipost.org/SciPostPhys.18.6.176
JF  - SciPost Physics
JA  - SciPost Phys.
VL  - 18
IS  - 6
SP  - 176
A1  - Benincasa, Paolo
AU  - Vazao, Francisco
AB  - Cosmological observables in perturbation theory turn out to be plagued with infrared divergences, which represents both a conceptual and computational challenge. In this paper we present a proof of concept for a systematic procedure to remove these divergences in a large class of scalar cosmological integrals and consistently define an infrared safe computable in perturbation theory. We provide diagrammatic rules which are based on the nestohedra underlying the asymptotic structure of such integrals.
ER  -

@Article{10.21468/SciPostPhys.18.6.176,
	title={{Cosmological infrared subtractions & infrared-safe computables}},
	author={Paolo Benincasa and Francisco Vazão},
	journal={SciPost Phys.},
	volume={18},
	pages={176},
	year={2025},
	publisher={SciPost},
	doi={10.21468/SciPostPhys.18.6.176},
	url={https://scipost.org/10.21468/SciPostPhys.18.6.176},
}