From the 1 of 12 linked papers with an AI index.
12 papers
Seesaw Cosmology
Nicolás Bernal, Chee Sheng Fong, Ãscar Zapata
The paper investigates a reheating scenario where the inflaton decays into right‑handed neutrinos that generate light neutrino masses via the type‑I seesaw, leading to a nonstandar…
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…
Minimal Freeze-in Dark Matter: Reviving electroweak doublet dark matter with Boltzmann suppressed freeze-in
Nicolás Bernal, Sagnik Mukherjee, James Unwin
Dark matter communicating with the Standard Model solely via electroweak interactions provides a compelling picture. However, thermal freeze-out of electroweak doublet dark matter…
Testing frozen-in pNGB dark matter with a long-lived dark Higgs
Nicolás Bernal, Giovanna Cottin, Bastián DÃaz 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…
Constraining the Coexistence of Freeze-in Dark Matter and Primordial Black Holes
Prolay Chanda, Sagnik Mukherjee, James Unwin
Particle dark matter and primordial black holes (PBH) might coexist with appreciable cosmic abundances, with both contributing to the observed dark matter density . La…
Boltzmann Suppressed Ultraviolet Freeze-in
Nicolás Bernal, Sagnik Mukherjee, James Unwin
If the dark matter mass exceeds the maximum temperature of the Universe (), then its production rate will be Boltzmann suppressed. The important implications o…