# Axion: Mass -- Dark Matter Abundance Relation

- Institution: CERN
- Department: TH Theoretical Seminar
- Speaker: Guy Moore
- Year: 2016
- Language: English
- Source: [CERN](https://videos.cern.ch/record/3004480)
- Licence: [CERN](http://copyright.web.cern.ch)
- Who can watch: Teens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words)

The axion is a hypothetical particle which would explain why QCD is approximately T-conserving, and is also an excellent Cold Dark Matter candidate. It should be possible to make a clean theoretical prediction relating the dark matter density in axions and the axion mass (under reasonable assumptions about inflation). But the axion's early-Universe dynamics, which establish its density as dark matter, are unexpectedly rich in a way which is only starting to yield to quantitative numerical study..

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## Lectures

1. [Axion: Mass -- Dark Matter Abundance Relation](https://invisiblenetwork.ai/learn/cern/3004480/4c404f58da2f), 1 h (CERN's player)