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U_A(1) dynamics have the potential to induce a polarised condensate inside anucleon. The formation of this condensate is related to the realisation ofU_A(1) symmetry breaking by tunneling processes such as instantons. If it ispresent, the polarised condensate induces a term in g_1 which has support onlyat x=0. Tunneling processes then induce a net transfer of ``spin'' from finitex to x=0. The polarised condensate may be measured by comparing theflavour-singlet axial charges which are extracted from polarised deep inelasticand nu p elastic scattering experiments.Comment: 13 pages LaTeX, Section 3 improved to include discussion of the 3  flavour quark instanton interaction; to appear in Mod. Phys. Lett.

A POLARISED QCD CONDENSATE: νp ELASTIC SCATTERING AS A PROBE OF UA(1) DYNAMICS

A POLARISED QCD CONDENSATE: νp ELASTIC SCATTERING AS A PROBE OF U_A(1) DYNAMICS