Form Factor for a Two-Particle System within a Relativistic Quasipotential Approach: Case of Arbitrary Masses and of a Vector Current

Abstract

A new relativistic form factor for a bound two-particle system was obtained for the case of avector current. The present consideration was performed within the relativistic quasipotential approachbased on the covariant Hamiltonian formulation of quantum field theory by going over to the three-dimensional relativistic configuration representation for the case of interaction between two relativisticspinless particles of arbitrary mass.