  It is suggested that the properties of the mass spectrum of elementary
particles could be related with cosmology. Solutions of the Klein-Gordon
equation on the Friedmann type manifold with the finite action are constructed.
These solutions (actons) have a discrete mass spectrum. We suggest that such
solutions could select a universe from cosmological landscape. In particular
the solutions with the finite action on de Sitter space are investigated.

High Energy Physics - Theory;General Relativity and Quantum Cosmology