Resumming cosmic perturbations

by Pietroni, Massimo (INFN Padova)

Thursday 31 May 2007, 14:00 → 15:00 Europe/Zurich

TH Auditorium (CERN)

Feynman diagrams and renormalization group techniques can be applied to the study of the dynamics of structure formation in the Universe. A semi-analytic approach to the computation of the power-spectrum of dark matter density fluctuations will be described. The method can be applied down to zero redshift and to length scales where perturbation theory fails. Our predictions accurately fit the results of numerical simulations in reproducing the 'acoustic oscillations' features of the power spectrum, which will be accurately measured in future galaxy surveys and will provide a probe to distinguish among different dark energy models.