Feb 12 – 17, 2023
École de Physique des Houches
Europe/Paris timezone

A late baryogenesis in an ekpyrotic-like universe with a hidden CP violation

Feb 14, 2023, 5:00 PM
30m
Amphi (École de Physique des Houches)

Amphi

École de Physique des Houches

149 Chem. de la Côté, 74310 Les Houche https://houches.univ-grenoble-alpes.fr/

Speaker

Michaël Sarrazin (Institut UTINAM, CNRS/INSU, UBFC)

Description

Two-brane universes are among the cosmological models of interest such as ekpyrotic models. It is then a major concern to constrain these scenarios. In the last two decades, it has been theoretically demonstrated that matter exchange between branes can occur and can be a way to test these scenarios. Thus, neutron disappearance (reappearance) toward (from) a hidden brane has been recently tested with short-baseline reactor experiments (MURMUR, STEREO) used as competitive passing-through-walls neutron experiments to search for hidden neutrons. Here, we introduce an ekpyrotic-like model in which the matter (respectively antimatter) of our brane is coupled with the matter (respectively antimatter) of the hidden brane. However both couplings are supposed to break the CP invariance through the bulk thus leading the baryogenesis to occur lately after the electroweak epoch. The theoretical and experimental outcomes, and issues of such an approach are discussed.

Presentation materials