23 citations · 120 across the 8 of their papers we have counts for
8 papers · 1 filter
Dark Matter and Baryogenesis from Visible-Sector Long-Lived Particles
Rouzbeh Allahverdi, Ngo Phuc Duc Loc, Jacek K. Osiński
We present a minimal extension of the standard model that includes a long-lived fermion with weak-scale mass and an fermionic dark matter candidate both of wh…
Dark matter production through a non-thermal flavon portal
Andrew Cheek, Jacek K. Osiński, Leszek Roszkowski +1
The Froggatt-Nielsen (FN) mechanism provides an attractive way of generating the determined fermion mass hierarchy and quark mixing matrix elements in the Standard Model (SM). Here…
Dark Matter Axions in the Early Universe with a Period of Increasing Temperature
Paola Arias, Nicolás Bernal, Jacek K. Osiński +1
We consider the production of axion dark matter through the misalignment mechanism in the context of a nonstandard cosmological history involving early matter domination by a scala…
Early Matter Domination from Long-Lived Particles in the Visible Sector
Rouzbeh Allahverdi, Jacek K. Osiński
We show that a nonstandard cosmological history with a period of early matter domination driven by a sub-TeV visible-sector particle can arise rather naturally. This scenario invol…
Superheavy Dark Matter from String Theory
Rouzbeh Allahverdi, Igor Broeckel, Michele Cicoli +1
Explicit string models which can realize inflation and low-energy supersymmetry are notoriously difficult to achieve. Given that sequestering requires very specific configurations,…
Hidden Sector Monopole Dark Matter with Matter Domination
Michael L. Graesser, Jacek K. Osiński
The thermal freeze-out mechanism for relic dark matter heavier than TeV requires cross-sections that violate perturbative unitarity. Yet the existence of dark matter…
Freeze-in Production of Dark Matter Prior to Early Matter Domination
Rouzbeh Allahverdi, Jacek K. Osiński
Freeze-out or freeze-in during a period of early matter domination can yield the correct dark matter abundance for small values of the velocity-averaged annihilation cross section,…
Non-thermal Dark Matter from Modified Early Matter Domination
Rouzbeh Allahverdi, Jacek K. Osiński
Thermal freeze-out or freeze-in during a period of early matter domination can give rise to the correct dark matter abundance for $\langle σ_{\rm ann} v \rangle_{\rm f} < 3 \times…