recent work, we showed that a high-significance excess in the cosmic optical background measured by NASA’s New Horizons spacecraft can be explained by an axion-like particle in a region of parameter space that was previously unconstrained. Motivated by this result, we then studied a similar parameter space through the attenuation of γ-rays from blazars." />

Dark matter

Axions and axion-like particles are among the compelling dark-matter candidates. In a recent work, we showed that a high-significance excess in the cosmic optical background measured by NASA’s New Horizons spacecraft can be explained by an axion-like particle in a region of parameter space that was previously unconstrained. Motivated by this result, we then studied a similar parameter space through the attenuation of γ-rays from blazars.