# Loop Corrections to Cosmological Correlators

- Institution: CERN
- Department: Conferences, Workshops & Schools
- Speaker: Charalampos Anastasiou
- Year: 2023
- Language: English
- Source: [CERN](https://videos.cern.ch/record/3000248)
- Licence: [CERN](http://copyright.web.cern.ch)
- Who can watch: Teens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words)

Surveys of the Large Scale Structure are becoming increasingly detailed. A primary theoretical tool for analyzing this data and constraining cosmological models is the Effective Field Theory (EFT) of Large Scale Structure. In this presentation, I will describe an effort to calculate loop corrections to cosmological correlators within the EFT of LSS. I will discuss how loop integrals in cosmology can be mapped to conventional loop integrals in QFT with massive propagators. Within this framework, I will describe the efficient "analytical" computation of all one-loop correlators using powerful and well established QFT methods. Subsequently, I will discuss the introduction of numerical methods for computing multi-loop correlators. Finally, I will present the initial (preliminary) results for the two-loop corrections to the power spectrum..

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## Lectures

1. [Loop Corrections to Cosmological Correlators](https://invisiblenetwork.ai/learn/cern/3000248/90a955c328cc), 28 min (CERN's player)