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Francesca Day (University of Oxford)
Friday 22 January 2016, 16:00-17:00
Signatures of axion-like particle dark matter and dark radiation
- đ¤ Speaker: Francesca Day (University of Oxford)
- đ Date & Time: Friday 22 January 2016, 16:00 - 17:00
- đ Venue: B1.19, DAMTP
Abstract
Many extensions of the Standard Model include axions or axion-like particles. Such axions are potentially observable via their interaction with electromagnetism, leading to axion-photon conversion in an external magnetic field. I will discuss potential observational signatures of axions in galaxies and galaxy clusters. In particular, I will present predictions from a cosmic axion background propagating in galaxies. I will also describe a scenario in which the recently observed 3.5 keV photon line is caused by dark matter decay to axions, which then mix with the photon in astrophysical magnetic fields. I will motivate this scenario in terms of the observed morphology of the line, and present predictions unique to this model.
Series This talk is part of the HEP phenomenology joint Cavendish-DAMTP seminar series.
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