Mass spectrum bound state system with relativistic corrections

charged n scalar particles in an external gauge field, we determine the interaction Hamiltonian including the relativistic corrections. The mass spectrum of the bound state is analytically derived. The mechanism for arising of the constituent mass of the relativistic bound-state forming Q1 particles is explained. The mass and the constituent mass of the two-, three- and n-body relativistic bound state are calculated by taking into account relativistic corrections. Q2 The corrections arising due to the one- and two-loop electron polarization to the energy spectrum of muonic hydrogen with orbital and radial excitations are calculated.

BOUND STATES, MASS