  The article proposes generalizations of the macroscopic model of plasma of
scalar charged particles to the cases of inter-particle interaction with
multiple scalar fields and negative effective masses of these particles. The
model is based on the microscopic dynamics of a particle at presence of scalar
fields. The theory is managed to be generalized naturally having strictly
reviewed a series of its key positions depending on the sign of particle
masses. Thereby, it is possible to remove the artiicial restriction
contradicting the more fundamental principle of action functional additivity.
