Photon-ALP oscillations at CTA energies
Peer reviewed, Journal article
Published version
Permanent lenke
https://hdl.handle.net/11250/3122282Utgivelsesdato
2023Metadata
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- Institutt for fysikk [2653]
- Publikasjoner fra CRIStin - NTNU [37221]
Originalversjon
10.21468/SciPostPhysProc.12.043Sammendrag
Axions and axion-like-particles (ALPs) are well motivated beyond the standard model particles that can explain a variety of unsolved problems in physics, such as the strong CP problem and the nature of dark matter. These particles are characterised by their two-photon coupling, which leads to so-called photon-ALP oscillation as photons propagate through an external magnetic field. Such oscillations lead to characteristic signatures in the energy spectrum of high-energy photons from astrophysical sources, allowing us to probe the existence of ALPs and possibly dark matter. We review the signatures from ALPs in photon spectra and discuss a new method that can be used to directly search for the energy dependence of the oscillations. The focus is on photons at TeV-energies relevant for the upcoming Cherenkov Telescope Array (CTA).