Searching for light dark matter

Abstract

We discussed about the ways to search for light dark matter. Nowadays, when the paradigm of dark matter changes with light dark matter, the dark matter in dark sector and axino-like particle (ALPino), which are candidates for light dark matter, can be probed through distortion of the Cosmic Microwave Background (CMB) radiation and fixed target experiments, respectively. It is shown that the spectral distortion of CMB allows the dark matter in the dark sector to be probed slightly weaker than the previous bounds, and the fixed-target experiment expected to probe the ALPino more strongly than the previous bounds.