7 papers
A model for mixed warm and hot right-handed neutrino dark matter
Maíra Dutra, Vinícius Oliveira, C. A. de S. Pires +1
We discuss a model where a mixed warm and hot keV neutrino dark matter rises naturally. We arrange active and sterile neutrinos in the same multiplet, with the lightest s…
Testing freeze-in with axial and vector bosons
Catarina Cosme, Maíra Dutra, Stephen Godfrey +1
The freeze-in production of Feebly Interacting Massive Particle (FIMP) dark matter in the early universe is an appealing alternative to the well-known - and constrained - Weakly In…
Neutrino Portal to FIMP Dark Matter with an Early Matter Era
Catarina Cosme, Maíra Dutra, Teng Ma +2
We study the freeze-in production of Feebly Interacting Massive Particle (FIMP) dark matter candidates through a neutrino portal. We consider a hidden sector comprised of a fermion…
The moduli portal to dark matter particles
Maíra Dutra
The out-of-equilibrium production of dark matter (DM) from standard model (SM) species in the early universe (freeze-in mechanism) is expected in many scenarios in which very heavy…
Freeze-in production of dark matter through spin-1 and spin-2 portals
Maíra Dutra
In this conference, I have talked about two scenarios in which the out-of-equilibrium production of dark matter (DM) particles in the early universe is unavoidable. In the first on…
Moduli Portal Dark Matter
Debtosh Chowdhury, Emilian Dudas, Maíra Dutra +1
We show that moduli fields as mediators between the Standard Model and the dark sector can naturally lead to the observed relic abundance. Indeed, even if moduli are very massive,…