2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/35655Making use of the primordially isocurvature fluctuations, which are generated in inflationary models with multiple scalar fields, we make a phenomenological model that predicts formation of primordial black holes which can account for the massive compact halo objects recently observed.17 pages, To be published in Proc. Sixth Quantum Gravity Seminar (Moscow)General Relativity and Quantum Cosmologytext