2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/192953At the Large Hadron Collider, we prove the feasibility to detect pair production of the lightest CP-even Higgs boson $h$ of Type II 2-Higgs Doublet Models through $q q^{(')}\to q q^{(')} {hh}$ (vector-boson fusion). We also show that, through the $hh\to 4b$ decay channel in presence of heavy-flavour tagging, further exploiting forward/backward jet sampling, one has direct access to the $λ_{Hhh}$ triple Higgs coupling -- which constrains the form of the Higgs potential.LaTeX, 25 pages, 11 Figures, 3 Tables, expanded discussion of unitarity constraints, the calculational method and uncertainties in background, accepted for publication in JHEPHigh Energy Physics - Phenomenologytext