collaborators

2 papers

hep-ph2026

Reheating the FCC: Probing Early Matter Domination with Long-Lived Particles

Nicolás Bernal, Giovanna Cottin, Kuldeep Deka +1

We study a GeV-scale Higgs-portal scalar that can dominate the early Universe and later decay into Standard Model states, ending an early matter-dominated era. Ordinary cosmic…

hep-ph2025

Testing frozen-in pNGB dark matter with a long-lived dark Higgs

Nicolás Bernal, Giovanna Cottin, Bastián Díaz Sáez +1

We consider a simple Higgs portal dark matter (DM) model, where the Standard Model is extended with a complex singlet scalar. The imaginary part of the scalar becomes a massive and…