We perform the first next-to-leading order computation of the γ(*)→V (ρ,φ,ω) exclusive impact factor in the QCD shock-wave approach and in the most general kinematics. This paves the way to the very first quantitative study of high-energy nucleon and nucleus saturation beyond the leading order for a whole range of small-x exclusive processes, to be measured in $ep$, $eA$, $pp$, and $pA$ collisions at existing and future colliders.
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Boussarie et al. (2017) studied this question.
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