Geodesic
Analytic properties of the inclusive cross section in the scattering angle in a class of ladder models with dynamical symmetry
Teoretičeskaâ i matematičeskaâ fizika, Tome 38 (1979) no. 1, pp. 48-57 Cet article a éte moissonné depuis la source Math-Net.Ru

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An investigation is made into the analytic properties of the single-particle inclusive cross section in the variable $\cos\theta$ ($\theta$ is the c. m. s. scattering angle) for ladder models with the dynamical symmetry $O(4,1)$. The analyticity domain is a plane with cuts along the real axis. The position of the singularities nearest the origin agrees with the conjecture made by Logunov and Mestvirishvili [2]. 
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V. Yu. D'yakonov; V. E. Rochev; S. N. Storchak. Analytic properties of the inclusive cross section in the scattering angle in a class of ladder models with dynamical symmetry. Teoretičeskaâ i matematičeskaâ fizika, Tome 38 (1979) no. 1, pp. 48-57. http://geodesic.mathdoc.fr/item/TMF_1979_38_1_a4/

[1] A. A. Logunov, M. A. Mestvirishvily, Nguen van Hieu, Phys. Lett., 25B (1967), 617

[2] A. A. Logunov, M. A. Mestvirishvili, TMF, 11 (1972), 203

[3] V. V. Ezhela, A. A. Logunov, M. A. Mestvirishvili, V. A. Petrov, TMF, 15 (1973), 153

[4] A. A. Logunov, M. A. Mestvirishvili, V. A. Petrov, TMF, 21 (1974), 305 | MR

[5] A. A. Logunov, M. A. Mestvirishvili, V. A. Petrov, Obschie printsipy kvantovoi teorii polya i ikh sledstviya, «Nauka», 1977, 183–276 | MR

[6] G. L. Rcheulishvili, Preprint IFVE 72-96, Serpukhov, 1972

[7] V. Yu. Dyakonov, V. E. Rochev, TMF, 32 (1977), 131

[8] A. I. Oksak, V. E. Rochev, TMF, 33 (1977), 327 | MR

[9] G. Beitmen, A. Erdeii, Vysshie transtsendentnye funktsii, t. I, «Nauka», 1973 | MR