# In the footsteps of axions or the like

- Institution: CERN
- Department: TH Theoretical Seminar
- Speaker: K. (University of Patras) Zioutas
- Year: 2006
- Language: English
- Source: [CERN](https://videos.cern.ch/record/3004889)
- 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)

Axions were invented to solve the strong CP-problem and are one of the leading dark matter particle candidates. Axions could be copiously produced in the Sun. In magnetic fields they can oscillate to photons and vice versa. The axion helioscope CAST uses an LHC magnet to convert solar axions to X-rays. Also, in the solar atmosphere the large scale magnetic fields reach occasionally several kGauss. Assuming the CAST working principle occurring there much more efficiently, it could explain the unexpected appearance of X-rays (from axions) or disappearance of light (into axions). Such processes can be behind persisting solar mysteries, suggesting the participation of a) solar magnetic fields, and b) radiatively decaying massive particles. Enigmatic behaviour leading to solar X-ray emission, coronal heating, flares, sunspots, etc. is considered as evidence of overlooked signature of axions or other particles with similar properties. New solar axion searches in the lab and with space X-ray telescopes, have been motivated and are in progress..

0:00:00 Slide 1

0:03:15 Slide 2

0:06:30 Slide 3

0:13:00 Slide 4

0:19:30 Slide 5

0:26:00 Slide 6

0:32:30 Slide 7

0:39:00 Slide 8

0:45:30 Slide 9

0:52:00 Slide 10

0:58:30 Slide 11

## Lectures

1. [In the footsteps of axions or the like](https://invisiblenetwork.ai/learn/cern/3004889/049b035b6f14), 1 h 5 min (CERN's player)