Speaker
Neil Barrie
(Kavli IPMU)
Description
We explore the possibility of an Ekpyrotic phase induced by a fast rolling pseudoscalar field prior to a non-singular bounce harbouring a mechanism for Baryogenesis. Chern-Simons couplings to the Standard Model Hypercharge and Weak gauge fields enable the generation of a non-zero Chern-Simons number density during the contracting phase. The resulting baryon number produced is found to be consistent with observation for a range of couplings and high bounce scales. The gauge field production may also be a source of gravitational waves and provide the seeds of galactic magnetic fields.
