# Moscow International School of Physics

20-27 February 2019
HSE Study Center “Voronovo”
Europe/Moscow timezone

## Inflationary limits on the size of compact extra space

26 Feb 2019, 20:24
12m
HSE Study Center “Voronovo”

#### HSE Study Center “Voronovo”

Voronovskoe, Moscow Russian Federation
Talk [10+2 min]

### Speaker

Valery Nikulin (NRNU MEPhI)

### Description

We study restrictions imposed on the parameters of the Kaluza-Klein extra space supplied by the standard inflationary models. It is shown that the size of the extra space cannot be larger than $\sim 10^{-27}$cm and the $D$-dimensional Planck mass should be larger than $\sim 10^{13}$GeV. The validity of these estimates is discussed.
We also study creation of stable excitations of scalar field as the result of the extra metric evolution. It is shown that the possibility of their overproduction at the inflationary stage gives strong restrictions on the ratio of inflationary and compactification scales.

### Primary authors

Prof. Sergey Rubin (NRNU MEPhI) Valery Nikulin (NRNU MEPhI)

### Presentation Materials

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