Geodesic
One-dimensional model of three-particle resonances
Teoretičeskaâ i matematičeskaâ fizika, Tome 63 (1985) no. 1, pp. 78-87 
Yu. A. Kuperin; K. A. Makarov; B. S. Pavlov. One-dimensional model of three-particle resonances. Teoretičeskaâ i matematičeskaâ fizika, Tome 63 (1985) no. 1, pp. 78-87. http://geodesic.mathdoc.fr/item/TMF_1985_63_1_a5/
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     author = {Yu. A. Kuperin and K. A. Makarov and B. S. Pavlov},
     title = {One-dimensional model of three-particle resonances},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {78--87},
     year = {1985},
     volume = {63},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1985_63_1_a5/}
}
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The theory of extensions is used to construct a nontrivial $S$ matrix for a system of three one-dimensional particles in the boundary condition model. The analytic structure of the constructed S matrix on the energy shell is investigated.

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