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Cosmological infrared subtractions & infrared-safe computables

Name: Cosmological infrared subtractions & infrared-safe computables
Keywords: High Energy Physics - Theory, High Energy Physics - Theory (hep-th), Combinatorics, Physics, QC1-999, FOS: Mathematics, FOS: Physical sciences, General Relativity and Quantum Cosmology (gr-qc), Combinatorics (math.CO), General Relativity and Quantum Cosmology

descriptionPublicationkeyboard_double_arrow_right Article , Preprint 04 Jun 2025Embargo end date: 01 Jan 2024Publisher:Stichting SciPostJournal:SciPost Physics, volume 18 (eissn: 2542-4653,

Authors: Paolo Benincasa; Francisco Vazao;

doi: 10.21468/scipostphys.18.6.176 , 10.48550/arxiv.2405.19979

arXiv: http://arxiv.org/abs/2405.19979

Cosmological infrared subtractions & infrared-safe computables

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Abstract

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.

Related Organizations

Max Planck Society
Germany
Max Planck Institute of Neurobiology
Germany
University of Santiago de Compostela
Spain

Keywords

High Energy Physics - Theory, High Energy Physics - Theory (hep-th), Combinatorics, Physics, QC1-999, FOS: Mathematics, FOS: Physical sciences, General Relativity and Quantum Cosmology (gr-qc), Combinatorics (math.CO), General Relativity and Quantum Cosmology

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