2 Reduction of the Bethe - Salpeter equation for the scattering amplitude of the particles with spin 1 to system of the integral equations for invariant functions
نویسندگان
چکیده
Bethe-Salpeter equation for the massive particles with spin 1 is considered. The scattering amplitude decomposition of the particles with spin 1 by relativistic tensors is derived. The transformation coefficients from helicity amplitudes to invariant functions is found. The integral equations system for invariant functions is obtained and partial decomposition of this system is performed. Equivalent system of the integral equation for the partial helicity amplitudes is presented. 1 The Bethe-Salpeter equation was initially formulated in quantum electrodynamics [1, 2] to describe the bound two-body states in the case where neither particle could 1
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