Systematic Renormalization in the Effective Theory of the Large Scale Structure of the Universe

by Dr Ali Akbar Abolhasani (Department of Physic, SUT and School of Physics, IPM)

Wednesday 10 Feb 2016, 15:00 → 16:30 Asia/Tehran

Seminar Room (Larak)

A perturbative description of the Large Scale Structure (LSS) is a pillar of our understanding of the observed distribution of matter in the Universe. Renormalization is an essential and defining step to make this description physical and predictive. In this talk I will start by a concise review of the preliminaries of the standard perturbation theory (SPT) and diagrammatic representation of perturbation theory. Next I will try to elaborate the very meaning of "renormalization" in the Effective Field Theory of Large Scale Structure (EFT of LSS) and the structure of the so-called counter-terms. In closing I will show the results of the EFT of LSS approach are in a percent level agreement with the numerical data.