Low-mass boson dark matter particles produced after Big Bang form classical field and/or topological defects. In contrast to traditional dark matter searches, effects produced by interaction of an ordinary matter with this field and defects may be first power in the underlying interaction strength rather than the second power or higher (which appears in a traditional search for the dark...
The recent decade saw a tremendous improvement of sensitivities in direct searches for dark matter, which keep improving at a rate of about an order of magnitude every couple of years. The major improvements so far have been mostly in scaling up the size and exposure of the experiments, with all of the related challenges.
I will review some of the basic rules dominating this line of searches,...
