Instanton-driven gluon saturation

We report on the interesting possibility of instanton-driven gluon saturation in lepton-nucleon scattering at small Bjorken-x. The explicitly known instanton gauge field serves as a concrete realization of an underlying non-perturbative saturation mechanism associated with strong classical fields. The conspicuous, intrinsic instanton size scale known from lattice simulations, turns out to determine the saturation scale. The 'colour glass condensate' can be identified in our approach with the QCD-sphaleron state, dominating instanton-induced processes in the softer regime. (orig.)Available from TIB Hannover: RA 2999(04-124) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman