2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/222929We consider dynamics of vacuum decay and particle production in the context of short pulse laser experiments. We identify and evaluate the invariant "materialization time," $τ$, the timescale for the conversion of an electromagnetic field energy into particles, and we compare to the laser related time scales.4 pages, 2 figures; improved representation of eq. 12, improved figures, added references, improved introductory material, and corrected typosHigh Energy Physics - PhenomenologyNuclear TheoryOpticstext