Axion-like particles, cosmic magnetic fields and gamma-ray astrophysics

作者：De Angelis Alessandro; Mansutti Oriana; Roncadelli Marco^*

来源：Physics Letters B, 2008, 659(5): 847-855.

DOI：10.1016/j.physletb.2007.12.012

• axion
• photon propagation

Axion-like particles (ALPs) are predicted by many extensions of the Standard Model and give rise to characteristic dimming and polarization effects in a light beam travelling in a magnetic field. In this Letter, we demonstrate that photon-ALP mixing in cosmic magnetic fields produces an observable distortion in the energy spectra of distant gamma-ray sources (like AGN) for ranges of the ALP parameters allowed by all available constraints. The resulting effect is expected to show tip in the energy band 100 MeV-100 GeV, and so it can be searched with the upcoming GLAST mission.

• 出版日期2008-2-7