High Energy Theory Group Seminars
Dark bubbles from M-theory
by
→
Europe/Rome
1/1-2 - Aula "C. Voci" (Dipartimento di Fisica e Astronomia - Edificio Marzolo)
1/1-2 - Aula "C. Voci"
Dipartimento di Fisica e Astronomia - Edificio Marzolo
32
Description
An expanding bubble in AdS5 has a dS4 geometry; the dark bubble scenario explores whether this can be our Universe. I will describe new realizations of this idea in M-theory. The most interesting one has a flag manifold as internal space. The effective cosmological constant can be tuned to small values. As one does so, the extra dimensions grow, but slowly: $R\sim \Lambda_4^{-1/4}$, getting intriguingly close to current data for extra dimensions.