У оквиру семинара Групе за гравитацију, честице и поља, у петак, 30. маја 2025. године у 11:15 у сали 360 Института за физику у Београду, др Горан Ђорђевић (Природно-математички факултет, Универзитет у Нишу) одржаће предавање:
Scaling Invariance of Perturbations in k-Inflation Models
САЕЖТАК:
The study of the background and perturbations in k-essence inflation models is presented. It is shown that a general k-essence exhibits a simple scaling property. The accent is given on study of the two classes of k-inflation models with the potential characterized by an inflection point. This study allow to redefine input parameters so that the perturbations spectra satisfy the correct normalization at the CMB
pivot scale. The background and perturbation equations are integrated numerically for two specific models. The abundance of primordial black holes today within the two models is briefly reviewed.