Abstracts

Ignatios Antoniadis

Scale hierarchies and string cosmology

I will discuss the problem of scale hierarchies in string phenomenology of particle physics and cosmology and propose ways to address it. In particular I will present a framework to relate the scales of supersymmetry breaking and inflation by identifying the inflaton with the goldstino superpartner. In this context, I will also propose a mechanism for supersymmetry breaking in the presence of a tiny (tunable) positive cosmological constant and describe its phenomenological consequences.