caa a22 4500 46903565X CHVBK 20180323132755.0 cr unu---uuuuu 170328e19920101xx s 000 0 eng 10.1007/BF01018820 doi (NATIONALLICENCE)springer-10.1007/BF01018820 Pair-interaction approximation in the equations of quantum field theory for a four-body system [Elektronische Daten] [A. Kvinikhidze, A. Khvedelidze] It is shown that for the correct formulation of the pair-interaction approximation in the dynamical equations for a system of four and more particles in the various approaches of quantum field theory not only the sum of the pair-interaction potentials but also additional, "two-pair” kernels must be taken into account. Equations of two types with compact kernels that take into account these terms are obtained. The kernels of these equations are expressed in terms of the two-annd three-particle scattering amplitudes. The equations of the first type have a structure identical to their nonrelativistic analog, whereas the equations of the second type differ from the nonrelativistic equations even in the number of components. An advantage of these equations is that they can be generalized to the case of arbitrarily many particles. Plenum Publishing Corporation, 1992 Kvinikhidze A. aut Khvedelidze A. aut Theoretical and Mathematical Physics Kluwer Academic Publishers-Plenum Publishers 90/1(1992-01-01), 62-74 0040-5779 90:1<62 1992 90 11232 https://doi.org/10.1007/BF01018820 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01018820 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kvinikhidze A. aut NATIONALLICENCE 700 1- Khvedelidze A. aut NATIONALLICENCE 773 0- Theoretical and Mathematical Physics Kluwer Academic Publishers-Plenum Publishers 90/1(1992-01-01), 62-74 0040-5779 90:1<62 1992 90 11232 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer