γ* - γ* scattering: Saturation and unitarization in the BFKL approach

S. Bondarenko, M. Kozlov, E. Levin

Research output: Contribution to journalArticlepeer-review

Abstract

In this paper γ*-γ* scattering with large, but more or less equal virtualities of two photons is discussed using BFKL dynamics, emphasizing the large impact parameter behavior (bt) of the dipole-dipole amplitude. It is shown that the non-perturbative contribution is essential to fulfill the unitarity constraints in the region of bt < 1/2mπ, where mπ is pion mass. The saturation and the unitarization of the dipole-dipole amplitude is considered in the framework of the Glauber-Mueller approach. The main result is that we can satisfy the unitarity constraints introducing the non-perturbative corrections only in initial conditions (Born amplitude).

Original languageEnglish
Pages (from-to)3081-3102
Number of pages22
JournalActa Physica Polonica B
Volume34
Issue number6
StatePublished - Jun 2003

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