Geodesic
$1/N$~perturbation theory and quantum conservation laws for the supersymmetric chiral field.~I
Teoretičeskaâ i matematičeskaâ fizika, Tome 40 (1979) no. 1, pp. 3-14

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A $1/N$ perturbation theory and a superdiagram technique are constructed in an explicitly supersymmetrie form for the supersymmetric chiral field (supersymmetric nonlinear $\sigma$ model). The absence of multiparticle production is demonstrated in the principal order in $1/N$ for the $2\leftrightarrow4$ scattering amplitude. Quantum equations of motion are derived and the first nontrivial quantum conservation laws are constructed. 
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     author = {I. Ya. Aref'eva and V. K. Krivoshchekov and P. B. Medvedev},
     title = {$1/N$~perturbation theory and quantum conservation laws for the supersymmetric chiral {field.~I}},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
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     volume = {40},
     number = {1},
     year = {1979},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1979_40_1_a0/}
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I. Ya. Aref'eva; V. K. Krivoshchekov; P. B. Medvedev. $1/N$~perturbation theory and quantum conservation laws for the supersymmetric chiral field.~I. Teoretičeskaâ i matematičeskaâ fizika, Tome 40 (1979) no. 1, pp. 3-14. http://geodesic.mathdoc.fr/item/TMF_1979_40_1_a0/