Constraints on axion-like particles from gamma-ray astronomy with H.E.S.S
High Energy Astrophysical Phenomena
2019-08-13 v2 Cosmology and Nongalactic Astrophysics
High Energy Physics - Phenomenology
Abstract
Pseudoscalar particles like axion-like particles generically couple to two photons, giving rise to the possibility of oscillations with photons in an external magnetic field. These oscillations could lead to measurable imprints in the electromagnetic spectrum of astrophysical sources if the coupling to photons is strong enough. One possible signature is the presence of irregularities in a limited energy range of the spectrum. In this study, anomalous irregularities are searched for in the spectrum of the bright extragalactic TeV emitter PKS 2155-304 as measured by H.E.S.S. to put constraints on the coupling of light spin 0 particles to photons.
Keywords
Cite
@article{arxiv.1304.0700,
title = {Constraints on axion-like particles from gamma-ray astronomy with H.E.S.S},
author = {Denis Wouters and Pierre Brun},
journal= {arXiv preprint arXiv:1304.0700},
year = {2019}
}
Comments
Figures updated. To appear in the proceedings of the Rencontres de Moriond 2013