2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/46506Present data do not rule out a light neutral Higgs particle with mass below 40--50 GeV in the framework of 2HDM with $ tan β\sim $ 20-30. The promising possibility of searching for a light Higgs particle in such a scenario in photoproduction at HERA collider is discussed. For the MSSM there is only a very small chance to observe the Higgs sector, and only for limited mass range $\sim$ 45-50 GeV and with large $ tan β$.12 pages, including 5 figure; Contribution to "Future Physics at HERA" Workshop, 1995-1996, Hamburg, DESYHigh Energy Physics - Phenomenologytext