Geodesic
Bound states and poles of the two-particle Green's function
Teoretičeskaâ i matematičeskaâ fizika, Tome 30 (1977) no. 1, pp. 12-17 
A. Karimkhodzhaev; R. N. Faustov. Bound states and poles of the two-particle Green's function. Teoretičeskaâ i matematičeskaâ fizika, Tome 30 (1977) no. 1, pp. 12-17. http://geodesic.mathdoc.fr/item/TMF_1977_30_1_a2/
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     title = {Bound states and poles of the two-particle {Green's} function},
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     volume = {30},
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}
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Voir la notice de l'article provenant de la source Math-Net.Ru

Consistent derivation is given for the exact expression of the bound state pole contribution into the two-particle Green function. The derivation is based on the most general definition of the center of mass coordinates and relative coordinates of particles.

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