Geodesic
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 
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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     title = {Unitary condition and decrease of~the~differential cross section of~multiparticle production with increasing energy},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
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Voir la notice de l'article provenant de la source Math-Net.Ru

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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