PIRSA:23120032 Scientific Series Cosmology

DOI10.48660/23120032

Series: Cosmology and Gravitation

Rubira, H. (2023). The Large-Scale Structure Renormalization Group: Bridging the Gap Between QFT and Cosmology - VIRTUAL. Perimeter Institute. https://pirsa.org/23120032

Rubira, Henrique. The Large-Scale Structure Renormalization Group: Bridging the Gap Between QFT and Cosmology - VIRTUAL. Perimeter Institute, Dec. 05, 2023, https://pirsa.org/23120032 

@misc{ pirsa_PIRSA:23120032,
  doi = {10.48660/23120032},
  url = {https://pirsa.org/23120032},
  author = {Rubira, Henrique},
  keywords = {Cosmology},
  language = {en},
  title = {The Large-Scale Structure Renormalization Group: Bridging the Gap Between QFT and Cosmology - VIRTUAL},
  publisher = {Perimeter Institute},
  year = {2023},
  month = {dec},
  note = {PIRSA:23120032 see, \url{https://pirsa.org}}
}

Abstract

Major improvements in the theoretical aspects of Cosmology have been possible in recent years due to QFT-inspired methods, such as the effective field theory of large-scale structure (EFTofLSS). In this talk, I will explore further connections between high-energy physics and cosmology. I will present a systematic approach to renormalizing the galaxy bias parameters using path integrals and a finite cutoff scale Λ. I will derive the differential equations of the Wilson-Polchinski renormalization group that describe the evolution of the finite-scale bias parameters with Λ, analogous to the β-function running in QFT. I will then discuss how the RG-flow of EFTofLSS can lead to improvements in the extraction of cosmological parameters and also serve as a tool for sanity checks.

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Zoom link https://pitp.zoom.us/j/93248279658?pwd=Z1M1UnI3eVh3NTZ3NCt4NUtGaW5idz09

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