2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/41810Starting with a new bosonization scheme for the βγCFT of the super-conformal ghosts, vertex operators are constructed for massless open string states in the intersecting D-brane world. These vertex operators satisfy all requirements for a consistent RNS formulation of superstring theories, so GSO projections can be properly taken.4 pages, RevTexHigh Energy Physics - PhenomenologyHigh Energy Physics - Theorytext