# Looping with combinatorics

- Institution: CERN
- Department: TH institutes
- Speaker: Paolo Benincasa
- Year: 2024
- Language: English
- Subjects: Mathematics
- Source: [CERN](https://videos.cern.ch/record/3019597)
- Licence: [CERN](http://copyright.web.cern.ch)
- Who can watch: Tweens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words)

Understanding the loop corrections to cosmological observables can have both phenomenological and theoretical implication: on the one hand, the coupling between the inflaton and fermions first appears at one-loop, and on the other hand they allow to have control on the quantum consistency of a theory in an expanding universe as well as to get a better handle on aspects of the framework underlying our current description of the primordial universe, i.e. quantum field theory in curved space-times. In this talk, I will provide an overview on recent progress on a general approach to understanding of the asymptotic behaviour of the cosmological observables as well as of their one loop corrections, based on the combinatorial features of a special integral representations for the perturbative contributions to cosmological observables..

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## Lectures

1. [Looping with combinatorics](https://invisiblenetwork.ai/learn/cern/3019597/699058d3ffe0), 57 min (CERN's player)