2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/98527The planed HERA upgrade will increase the integrated luminosity by two orders of magnitude.A new program of electron-nucleus collisions at HERA is under discussion now.In this connection we present prospects for the study of a light neutral Higgs boson, SUSY-particle, hadrons and leptons productionin the two-photon coherent eA collisions at HERA energies.6 pages, 8 .eps figuresHigh Energy Physics - Phenomenologytext