Geodesic
Investigation of nonanalyticity in the limit of chiral symmetry in the $SU_3$ sigmal model
Teoretičeskaâ i matematičeskaâ fizika, Tome 23 (1975) no. 3, pp. 421-426 
A. A. Khelashvili; V. Yu. Khmaladze. Investigation of nonanalyticity in the limit of chiral symmetry in the $SU_3$ sigmal model. Teoretičeskaâ i matematičeskaâ fizika, Tome 23 (1975) no. 3, pp. 421-426. http://geodesic.mathdoc.fr/item/TMF_1975_23_3_a15/
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     author = {A. A. Khelashvili and V. Yu. Khmaladze},
     title = {Investigation of nonanalyticity in the limit of chiral symmetry in the $SU_3$ sigmal model},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {421--426},
     year = {1975},
     volume = {23},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1975_23_3_a15/}
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Voir la notice de l'article provenant de la source Math-Net.Ru

Non-analytic behaviour of propagators, vertex functions and pseudoscalar meson octet scattering amplitudes in the chiral and low energy limits is investigated in the framework of the one-loop approximation of the perturbation theory in the $SU_3$ sigma-model. It is shown that the leading non-analytic contributions in scattering amplitudes are cancelled.

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