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Description of hadronic reactions at high energies is conventionally done onbasis of QCD factoriza- tion so that factorization convolutions involvenon-perturbative inputs mimicking non-perturbative contributions andperturbative evolution of those inputs. We construct the inputs for the gluon-hadron scattering amplitudes in the forward kinematics and, using the Opticaltheorem, convert them into inputs for gluon distributions in the both polarizedand unpolarized hadrons. Firstly, we derive general mathematical criteria whichany model for the inputs should obey and then suggest a Resonance Modelsatisfying those criteria. This model is inspired by a simple observation:after emitting an active parton off the hadron, the remaining ensemble ofspectators becomes unstable and therefore it can be described through factorsof the resonance type. Exploiting Resonance Model, we obtain non-perturbativeinputs for gluon distributions in unpolarized and polarized hadrons for allavailable forms of QCD factorization: Basic, KT - and Collinear Factorizations.We compare the obtained inputs to the inputs available in the literature.

Non-perturbative gluon-hadron inputs for all available forms of QCD factorization