Jul 4 – 11, 2018
COEX, SEOUL
Asia/Seoul timezone

Cosmological Helical Hypermagnetic Fields and Baryogenesis

Jul 5, 2018, 2:30 PM
15m
104 (COEX, Seoul)

104

COEX, Seoul

Parallel Astro-particle Physics and Cosmology Astro-particle Physics and Cosmology

Speakers

Kohei Kamada (Institute for Basic Science) Kohei Kamada (Institute for Basic Science)

Description

I will show that the baryon asymmetry of the Universe (BAU) is generated from the hypermagnetic helicity decay without being washed out by the sphalerons. Moreover such hypermangetic fields still remain until today as the intergalactic magnetic fields, which will be the smoking gun of the scenario. I will also discuss a possible mechanism to generate such hypermagnetic fields. That is, the chiral instability induced by a large chiral asymmetry in the early Universe thermal plasma, which can be generated by the SU(5) GUT baryogenesis. Although the SU(5) GUT baryogenesis has been thought not to be a viable model for the BAU since the asymmetry is washed out by the sphalerons, it can be indirectly responsible for the BAU through the maximally helical hypermagnetic field generation.

Primary author

Kohei Kamada (Institute for Basic Science)

Presentation materials