Research Progresses on Galactic Scale Boson Dark Matter postprint

Abstract: In the past years, the cold dark matter (CDM) model has been extensively stud#2;ied and provided a theoretical frameworks which offers an excellent explanation for severa l issues related to galaxies and the large-scale structure of universe. However, there are few challenges currently from observational phenomena in small scale with galaxies in the CDM model’s frameworks. Alternative approaches to the CDM model have been proposed and obtained some considerable attention. These progresses include the Bose-Einstein conden#2;sate dark matter (BEC-DM) model and the fuzzy dark matter (FDM) model. In BEC-DM model, dark matter particles are assumed to be a kind of boson in a macroscopic quantum state. On the other hand, the FDM model describes the dark matter as a particle which has wave-like properties and assumes its mass is smaller. Studies on these two theoretical models help us to understand the effects of different theoretical models on the density distri#2;bution and related properties of galaxies. This paper reviews the historical developments of dark matter research, introduces several dark matter particle candidates and their detection methods. Particularly, we present a detailed review on detection experiments for axion-like particles.