Soft pomeron in the color glass condensate approach

Carlos Contreras, Eugene Levin, Michael Sanhueza

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In this paper we suggest a new approach to the structure of the soft Pomeron: based on the t-channel unitarity, we expressed the exchange of the soft Pomeron through the interaction of the dipole of small size of the order of 1/Qs(Y) [Qs(Y) is the saturation momentum] with the hadrons. Therefore, it is shown that the typical distances in soft processes are small r∼1/Qs(12Y), where Y=lns. The saturation momentum, which determines the energy dependence of the scattering amplitude, is proportional to Qs2(12Y) exp(12λY), with λ≈0.2, and this behavior is in perfect agreement with the phenomenological Donnachie-Landshoff Pomeron. We demonstrate that the saturation models could describe the experimental data for σtot,σel,σdiff and Bel. Hence, our approach is a good first approximation to start discussion of the soft processes in the color glass condensate approach on the solid theoretical basis.

Original languageEnglish
Article number034011
JournalPhysical Review D
Issue number3
StatePublished - 1 Aug 2022


FundersFunder number
Conicyt BecasPIIC 009/2021
Programa de Investigación AsociativaPIA)/APOYO AFB180002
Universidad Técnica Federico Santa María
Fondo Nacional de Desarrollo Científico y Tecnológico1191434, 1180118
Agencia Nacional de Investigación y Desarrollo


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