Generalized coherent states for massive spinless fields in the de Sitter space

The de Sitter $SO(4,1)$ group conformal action is used to construct two different systems of generalized coherent states for the de Sitter group in the three-dimensional Euclidean space. The two systems of states have the physical sense of particles and antiparticles in the de Sitter space. The scalar product of two coherent states is a two-point function in the de Sitter space.