Signatures of axion-like particles in the spectra of TeV gamma-ray sources

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dc.creatorMirizzi, Alessandro
dc.creatorRaffelt, Georg G.
dc.creatorSerpico, Pasquale D.
dc.date2007-04-23
dc.date2007-07-13
dc.date.accessioned2026-07-07T11:20:22Z
dc.date.available2026-07-07T11:20:22Z
dc.descriptionOne interpretation of the unexplained signature observed in the PVLAS experiment invokes a new axion-like particle (ALP) with a two-photon vertex, allowing for photon-ALP oscillations in the presence of magnetic fields. In the range of masses and couplings suggested by PVLAS, the same effect would lead to a peculiar dimming of high-energy photon sources. For typical parameters of the turbulent magnetic field in the galaxy, the effect sets in at E_gamma >~ 10 TeV, providing an ALP signature in the spectra of TeV gamma sources that can be probed with Cherenkov telescopes. A dedicated search will be strongly motivated if the ongoing photon regeneration experiments confirm the PVLAS particle interpretation.
dc.description8 pages, 1 eps figure; typos corrected, matches published version
dc.identifierhttps://arxiv.org/abs/0704.3044
dc.identifierhttp://arxiv.org/abs/0704.3044
dc.identifierPhys.Rev.D76:023001,2007
dc.identifierdoi:10.1103/PhysRevD.76.023001
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/193937
dc.subjectAstrophysics
dc.subjectHigh Energy Physics - Phenomenology
dc.titleSignatures of axion-like particles in the spectra of TeV gamma-ray sources
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