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Search for decaying eV-mass axion-like particles using gamma-ray signal from blazars

Neronov, A.; Semikoz, D.; Korochkin, A.

Decaying axion-like particles (ALP) with masses in the eV range which might occupy dark matter halos of the Milky Way and other galaxies produce a characteristic "bump" feature in the spectrum of extragalactic background light (EBL). This feature leaves an imprint on the gamma-ray spectra of distant extragalactic sources. We derive constraints on …