Sources of CP Violation for Electroweak Baryogenesis (17'+3')

Oct 8, 2024, 12:30 PM
20m

Speaker

Bahaa Ilyas (Technical University of Munich)

Description

A persistent issue in electroweak baryogenesis calculations is the significant disparity in predictions yielded by different approaches, with variations spanning several orders of magnitude. In this study, we examine a system comprising two fermion flavours, proposing the existence of two sources of CP-violating. The semiclassical force and a new resonantly enhanced mixing source can be derived from the collisionless Kadanoff-Baym equation. The two sources are derived using the semiclassical approximation and the VEV insertion approximation. A Higgsino-Bino toy model shows that the new resonantly enhanced mixing source generates sufficient asymmetry to evade EDM bounds. In addition, a ready-to-plug equation for the source is prepared so phenomenologist can use it in their favourite model.

Presentation materials