Geodesic
Variable phase approach to many-channel relativistic scattering
Teoretičeskaâ i matematičeskaâ fizika, Tome 35 (1978) no. 2, pp. 173-179 
A. A. Atanasov. Variable phase approach to many-channel relativistic scattering. Teoretičeskaâ i matematičeskaâ fizika, Tome 35 (1978) no. 2, pp. 173-179. http://geodesic.mathdoc.fr/item/TMF_1978_35_2_a3/
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     author = {A. A. Atanasov},
     title = {Variable phase approach to many-channel relativistic scattering},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {173--179},
     year = {1978},
     volume = {35},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1978_35_2_a3/}
}
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Voir la notice de l'article provenant de la source Math-Net.Ru

A method of formal series is used to solve the system of variable phase equations that describe the two-channel scattering of a system of two particles in the annihilation channel. The equations are a generalization of the three-dimensional relativistic equation of quasipotential type in terms of rapidities.

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