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Photon-ALP oscillations at CTA energies

by M. Kachelriess and J. Tjemsland

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Submission summary

Authors (as registered SciPost users): Jonas Tjemsland
Submission information
Preprint Link: scipost_202210_00003v1  (pdf)
Date accepted: 2023-04-28
Date submitted: 2022-10-01 19:56
Submitted by: Tjemsland, Jonas
Submitted to: SciPost Physics Proceedings
Proceedings issue: 14th International Conference on Identification of Dark Matter (IDM2022)
Ontological classification
Academic field: Physics
Specialties:
  • High-Energy Physics - Theory
  • High-Energy Physics - Phenomenology
Approaches: Theoretical, Computational

Abstract

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).

Published as SciPost Phys. Proc. 12, 043 (2023)


Reports on this Submission

Report #1 by Anonymous (Referee 1) on 2022-11-9 (Invited Report)

  • Cite as: Anonymous, Report on arXiv:scipost_202210_00003v1, delivered 2022-11-09, doi: 10.21468/SciPost.Report.6110

Report

Discusses the effect of photon-ALP oscillations as photons propagate in extragalactic magnetic fields in the high-energy spectrum of photons at TeV-energies. This study is relevant for the upcoming Cherenkov Telescope Array. I recommend this proceeding for publication.

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