Unitary condition and decrease of the differential cross section of multiparticle production with increasing energy
Teoretičeskaâ i matematičeskaâ fizika, Tome 6 (1971) no. 1, pp. 42-54 Cet article a éte moissonné depuis la source Math-Net.Ru

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On the basis of the analytic properties of the inelastic process amplitude and the unitarity condition it is shown that the differential cross section of multiparticle production $d\sigma/d\Omega$ for fixed $\theta$ and $\varphi\ne 0, \pi$ decreases with increasing energy. An upper bound for the decrease is established.
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V. V. Ezhela; A. A. Logunov; M. A. Mestvirishvili. Unitary condition and decrease of the differential cross section of multiparticle production with increasing energy. Teoretičeskaâ i matematičeskaâ fizika, Tome 6 (1971) no. 1, pp. 42-54. http://geodesic.mathdoc.fr/item/TMF_1971_6_1_a4/

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