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arxiv: 0911.2489 · v1 · pith:AUHKYASMnew · submitted 2009-11-12 · 🌌 astro-ph.CO · astro-ph.HE· hep-ph

A new light boson from MAGIC observations?

Marco Roncadelli (1) , Alessandro De Angelis (2) , Oriana Mansutti (3) ((1) INFN , Sezione di Pavia , Italy , (2) Dipartimento di Fisica , Universita' di Udine , INAF
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INFN Sezioni di Trieste (3)Dipartimento di Fisica Sezione di Trieste Italy)
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classification 🌌 astro-ph.CO astro-ph.HEhep-ph
keywords magiclightobservationsargo-ybjarraysatmosphericaxion-likeblazar
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Recent detection of blazar 3C279 by MAGIC has confirmed previous indications by H.E.S.S. that the Universe is more transparent to very-high-energy gamma rays than currently thought. This circumstance can be reconciled with observations of nearby blazars provided that photon oscillations into a very light Axion-Like Particle occur in extragalactic magnetic fields. The emerging "DARMA scenario" can be tested in the near future by the satellite-borne Fermi LAT detector as well as by the ground-based Imaging Atmospheric Cherenkov Telescopes H.E.S.S., MAGIC, CANGAROO III, VERITAS and by the Extensive Air Shower arrays ARGO-YBJ and MILAGRO.

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