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

Non-thermal WIMP baryogenesis

Jul 5, 2018, 2:45 PM
15m
104 (COEX, Seoul)

104

COEX, Seoul

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

Speaker

Mr Jongkuk Kim (Sungkyunkwan University)

Description

We propose a WIMP baryogensis achieved by the annihilation of non-thermally produced WIMPs from decay of heavy particles, which can result in low reheating temerature. Dark matter (DM) can be produced non-thermally during a reheating period created by the decay of long-lived heavy particle, and subsequently re-annihilate to lighter particles even after the thermal freeze-out. The re-annihilation of DM provides the observed baryon asymmetry as well as the correct relic density of DM. We investigate how wahout effects can affect the generation of the baryon asymmetry and study a model suppressing them. In this scenario, we find that DM can be heavy enough and its annihilation cross section also can be larger than that adopted in the usual thermal WIMP baryogenesis.

Primary authors

Mr Jongkuk Kim (Sungkyunkwan University) Prof. Ki Young Choi (Sungkyunkwan University) Sin Kyu Kang (Seoul-Tech)

Presentation materials