Geodesic
Solvable model of an unrenormalizable field theory
Teoretičeskaâ i matematičeskaâ fizika, Tome 12 (1972) no. 3, pp. 349-351

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A study is made of a solvable unrenormalizable model that describes the interaction between a current of spinless particles and a fixed point-charge source. It is shown that the exact scattering amplitude decreases with increasing energy, while it increases according to perturbation theory. 
@article{TMF_1972_12_3_a2,
     author = {A. V. Efremov},
     title = {Solvable model of an unrenormalizable field theory},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {349--351},
     publisher = {mathdoc},
     volume = {12},
     number = {3},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1972_12_3_a2/}
}
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A. V. Efremov. Solvable model of an unrenormalizable field theory. Teoretičeskaâ i matematičeskaâ fizika, Tome 12 (1972) no. 3, pp. 349-351. http://geodesic.mathdoc.fr/item/TMF_1972_12_3_a2/