2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/210600The properties of the dark matter that determine its thermal relic abundance can be very different from the dark matter properties today. We investigate this possibility by coupling a dark matter sector to a scalar that undergoes a phase transition after the dark matter freezes out. If the value of Omega_DM h^2 calculated from parameters measured at colliders and by direct and indirect detection experiments does not match the astrophysically observed value, a novel cosmology of this type could provide the explanation. This mechanism also has the potential to account for the "boost factor" required to explain the PAMELA data.5 pages; v2: Fixed minor typo, added short discussion of application to PAMELA and appropriate references, results unchangedHigh Energy Physics - Phenomenologytext