2024/05/30 by Paolo Benincasa, Benincasa, Paolo, Francisco Vazão +1
Engineering · Environmental Science · #Astronomical Observations and Instrumentation #CCD and CMOS Imaging Sensors #Combinatorics (math.CO) #FOS: Mathematics #FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #High Energy Physics - Theory (hep-th) #Impact of Light on Environment and Health
paper · pdf · doi:10.48550/arxiv.2405.19979
openalex publication_date 2024/05/30 · openalex created_date 2024/06/02 · openalex updated_date 2026/07/30
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.