2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/203516We derive the non-linear action of E8(8) on the constrained chiral superfield in the light-cone superspace with eight complex Grassmann variables. We construct (to lowest order in the coupling) the sixteen dynamical supersymmetries which generate a Hamiltonian with E8(8) invariance in three space-time dimensions, and show that it has only interactions with even powers of the coupling constant.17 pages, v2: A few sentences added, few typos corrected, JHEP versionHigh Energy Physics - Theorytext