2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/185342The discovery potential of the HERA collider, with and without polarized beams, for electron-quark contact interactions in neutral current scattering is reviewed. The measurement of spin asymmetries in the polarized case could give crucial information on the chiral structure of new interactions.LaTeX, 4 pages, 1 figure, uses iopart style files, contribution to the 3rd UK Workshop on HERA Physics, Durham, Sept. 1998High Energy Physics - Phenomenologytext