Abstract
We derive inclusive and diffractive forward-gluon production in the scattering of a q q ¯ dipole off an arbitrary target in the high-energy eikonal approximation, suitable to study the saturation regime. We show how the inclusive cross-section is related to the total cross-section for the scattering of a colorless pair of gluons on the target: the gluon-production cross-section can be expressed as a convolution between this gg dipole total cross-section and a dipole distribution. We then consider as an application the forward-jet production from an incident hadron and describe forward-jet production at HERA and Mueller–Navelet jets at Tevatron or LHC. We show how these measurements are related to the q q ¯ – gg or gg– gg dipole–dipole cross-sections and why they are therefore well-suited for studying high-energy scattering in QCD.
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