| Issue |
EPJ Web Conf.
Volume 319, 2025
RICAP-24, 9th Roma International Conference on Astroparticle Physics
|
|
|---|---|---|
| Article Number | 13001 | |
| Number of page(s) | 2 | |
| Section | Poster | |
| DOI | https://doi.org/10.1051/epjconf/202531913001 | |
| Published online | 06 March 2025 | |
https://doi.org/10.1051/epjconf/202531913001
CTAO sensitivity to axion-like particles
1 Dipartimento Interateneo di FisicaM.Merlin, Università degli Studi di Bari, via Amendola 173, 70125, Bari, Italy
2 INFN Sezione di Bari, via Amendola 173, 70125, Bari, Italy
* e-mail: francesco.schiavone@ba.infn.it
Published online: 6 March 2025
Axion-like particles (ALPs) are a common feature in several extensions of the StandardModel, arising, for example, as a solution to the strong CP problem in quantum chromodynamics, or as a prediction of string theories. A significant property for the experimental detection of ALPs is their coupling to photons, which enables ALP-photon conversions in ambient magnetic fields. In particular, gamma rays could convert into ALPs in the magnetic fields of distant objects and then reconvert in the Milky Way’s magnetic field. By eluding absorption by the extragalactic background light (EBL), such a mechanism could produce a hardening in the gamma-ray spectra of these sources. We investigate the capability of the Cherenkov Telescope Array Observatory (CTAO) to detect signatures of ALP-photon conversions in the very-high-energy spectra of known blazars at energies above 10 TeV, comparing different magnetic field scenarios.
© The Authors, published by EDP Sciences, 2025
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