Abstract:
The quasipotential corresponding to the first variant of the Logunov–Tavkhelidze
quasipotential approach is constructed for two interacting spinor fields of equal masses,
using relativistically invariant gauges of the Lorentz type. Diagrams of the 2nd order
are taken into account and the quasipotential is found in the four-component Dirac and
two-component Pauli forms. Low energy bound of two-component representation is
obtained. Restoration of the complete structure of the Breit potential is shown in the
cases of Landau and Pried and Yennie gauges.
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