Zenodo (CERN European Organization for Nuclear Research)· 2026· Preprint
A Minimal Asymmetric Dark Matter Model with Higgs-Portal Mediation A GeV-Scale Counterpart to Visible Matter
- 463citations
- 2026year
Short summary
This paper proposes a minimal asymmetric dark matter model where dark and baryonic matter share a comparable cosmological origin, naturally leading to dark matter masses near the GeV scale.
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Key points
- Proposes a minimal asymmetric dark matter model with a stable Dirac fermion and Higgs-portal mediated scalar.
- Links dark matter mass to the GeV scale by assuming comparable dark and baryonic asymmetries, aligning with ΩDM/Ωb ≃ 5.4.
- Introduces an effective asymmetry-transfer operator and Boltzmann description for relic population.
- Highlights the scalar mediator's role in depleting the symmetric relic population.
AI-generated from the title and abstract; the full text is not read.
Abstract
We present a minimal asymmetric dark matter model in which the dark sector contains astable neutral Dirac fermion X carrying a conserved dark number and a real scalar mediatorϕ coupled to the Standard Model through a Higgs portal. Motivated by the observedrelation ΩDM/Ωb ≃ 5.4, we consider the case in which the dark and baryonic asymmetriesare of comparable order, implying a natural dark matter mass near the GeV scale. Weintroduce an explicit effective asymmetry-transfer operator, formulate the correspondingBoltzmann description for the symmetric and asymmetric components, and discuss the roleof the scalar mediator in depleting the symmetric relic population. We further comment onHiggs-portal phenomenology and benchmark parameter ranges consistent with the minimalframework. The model is intended as a phenomenological benchmark rather than a completeultraviolet completion, but it illustrates how dark matter may arise as a cold, stable, massivecounterpart to visible matter with a shared cosmological origin.
The authors' abstract, as published at the source. Zenodo (CERN European Organization for Nuclear Research), 2026 · DOI ↗
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Field: Nuclear and High Energy Physics
Nuclear and High Energy PhysicsPhysics and Astronomy