20 citations · 23 across the 15 of their papers we have counts for
16 papers
Quantum Seesaw Cosmology: A Heating Phase from Pauli Blocking
Nicolás Bernal, Chee Sheng Fong
In Seesaw Cosmology, a scalar field reheats the Standard Model (SM) through right-handed neutrinos (RHNs), which generate tiny neutrino masses through the seesaw mechanism. When RH…
Seesaw Cosmology
Nicolás Bernal, Chee Sheng Fong, Óscar Zapata
We study perturbative reheating in which the inflaton transfers its energy to the Standard Model through right-handed neutrinos (RHNs) responsible for light-neutrino masses via the…
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…
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…
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…
Enabling Thermal Dark Matter within the Vanilla - Model
Nicolás Bernal, Jacinto P. Neto, Javier Silva-Malpartida +1
Thermal dark matter is a compelling setup that has been probed by a multitude of experiments, mostly in the GeV-TeV mass range. The thermal paradigm in the sub-GeV range is about t…
Freezing-in Cannibals with Low-reheating Temperature
Nicolás Bernal, Esau Cervantes, Kuldeep Deka +1
The freeze-in mechanism provides a compelling framework for dark matter (DM) production, particularly suited to scenarios involving feeble interactions with the Standard Model (SM)…
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 . Lar…
Probing low-reheating scenarios with minimal freeze-in dark matter
Nicolás Bernal, Chee Sheng Fong, Óscar Zapata
The parameter space of freeze-in dark matter (DM) with mass through light dark photon (``minimal freeze-in DM'') is currently being probed by direct detection experiments thr…
Dark Matter Ultraviolet Freeze-in in General Reheating Scenarios
Nicolás Bernal, Kuldeep Deka, Marta Losada
The dynamics of cosmic reheating, that is, on how the energy stored in the inflaton is transferred to the standard model (SM) thermal bath, is largely unknown. In this work, we sho…
-Mediated Dark Matter with Low-Temperature Reheating
Geneviève Bélanger, Nicolás Bernal, Alexander Pukhov
We consider a simple extension of the standard model with fermionic dark matter (DM) and a gauge boson acting as a mediator. We also assume a scenario where cosmic reheating o…
Heavy Neutral Leptons without Prejudice
Nicolás Bernal, Kuldeep Deka, Marta Losada
Heavy Neutral Leptons (HNLs) provide a compelling extension to the Standard Model, addressing the neutrino masses, baryogenesis, and dark matter problems. We perform a model-indepe…
From WIMPs to FIMPs: Impact of Early Matter Domination
Javier Silva-Malpartida, Nicolás Bernal, Joel Jones-Pérez +1
In the context of non-standard cosmologies, an early matter-dominated (EMD) era can significantly alter the conventional dark matter (DM) genesis. In this work, we reexamine the im…
Thermal Dark Matter with Low-Temperature Reheating
Nicolás Bernal, Kuldeep Deka, Marta Losada
We explore the production of thermal dark matter (DM) candidates (WIMPs, SIMPs, ELDERs and Cannibals) during cosmic reheating. Assuming a general parametrization for the scaling of…
Discovering Heavy Neutral Leptons with the Higgs Boson
Nicolás Bernal, Kuldeep Deka, Marta Losada
We study the dominant signatures that arise in Higgs physics at colliders when extending the Standard Model (SM) with a Yukawa interaction to heavy neutral leptons (HNL), while sup…