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Astrophysics > High Energy Astrophysical Phenomena

arXiv:1307.6068 (astro-ph)
[Submitted on 23 Jul 2013]

Title:Constraints on axion-like particles with H.E.S.S. from observations of PKS 2155-304

Authors:Pierre Brun, Denis Wouters (for the H.E.S.S. collaboration)
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Abstract:Axion-like particles are hypothetical new light (sub-eV) bosons predicted in some extensions of the Standard Model of particle physics. In astrophysical environments comprising high-energy gamma rays and turbulent magnetic fields, the existence of axion-like particles can modify the energy spectrum of the gamma rays. This modification would take the form of an irregular behavior of the energy spectrum in a limited energy range. Data from the H.E.S.S. observations of the distant BL Lac PKS 2155-304 are used to derive conservative upper limits on the strength of the axion-like particle coupling to photons. This study gives rise to the first exclusions on axion-like particles from gamma-ray astronomy. The derived constraints apply to both light pseudo-scalar and scalar bosons that couple to the electromagnetic field.
Comments: In Proceedings of the 33rd International Cosmic Ray Conference (ICRC2013), Rio de Janeiro (Brazil)
Subjects: High Energy Astrophysical Phenomena (astro-ph.HE)
Cite as: arXiv:1307.6068 [astro-ph.HE]
  (or arXiv:1307.6068v1 [astro-ph.HE] for this version)
  https://doi.org/10.48550/arXiv.1307.6068

Submission history

From: Pierre Brun [view email]
[v1] Tue, 23 Jul 2013 13:32:30 UTC (187 KB)
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