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We propose an inflationary scenario where the inflaton field is non-minimallycoupled to spacetime curvature and inflation is driven by a vacuum energysymmetry breaking potential without specifying \emph{a priori} whether theinflaton field is small or large. As we incorporate vacuum energy into ouranalysis, we further explore the implications of a non-zero potential offset inrelation to the emergence of inflationary dynamics. Thus, we propose thatvacuum energy can transform into particles as a result of the transitiontriggered by spontaneous symmetry breaking. This entails a vacuum energycancellation that yields an effective cosmological constant during inflation byvirtue of a quasi-de Sitter evolution and shows that the vacuum energycontribution can manifest as \emph{geometric particles} produced by inflatonfluctuations, with particular emphasis on super-Hubble modes. We conjecturethese particles as \emph{quasi-particles} arising from interaction between theinflaton and spacetime geometry, enhanced by non-minimal coupling.Specifically, we propose that dark matter arises from a pure geometricquasi-particle contribution, and we quantify the corresponding dark mattercandidate ranges of mass. In this scenario, we further find that a zeropotential offset leads to a bare cosmological constant at the end of inflation,while a negative offset would require an additional kinetic (or potential)contribution in order to be fully-canceled. In this regard, we conclude thatthe scenario of large field inflaton is preferred since it necessitates a moreappropriate selection of the offset. Our conclusion is reinforced as smallfield inflaton would lead to a significant screening of the Newtoniangravitational constant as inflation ends.

Particle production from non-minimal coupling in a symmetry breaking potential transporting vacuum energy