February 28, 2020 to March 31, 2021
On Zoom
Europe/Rome timezone

Axiogenesis

Mar 26, 2020, 3:30 PM
30m
On Zoom

On Zoom

https://cern.zoom.us/j/5876144043

Speaker

Raymond Co (U. Michigan)

Description

We proposed a mechanism called axiogenesis to explain the observed cosmological excess of matter over antimatter. A rotation of the QCD axion is induced by explicit Peccei-Quinn symmetry breaking in the early universe. The rotation corresponds to the asymmetry of the PQ charge, which is converted into the baryon asymmetry via QCD and electroweak sphaleron transitions. The concrete model we explore predicts a small decay constant and has close connections with axion dark matter and new physics at the colliders.

Talk based on:
https://arxiv.org/pdf/1910.02080.pdf
https://arxiv.org/pdf/1910.14152.pdf

Presentation materials