3 papers
hep-ph2026
Warm dark matter from freeze-in at stronger coupling
Duarte Feiteira, Oleg Lebedev, VinÃcius Oliveira
We study warm Higgs portal dark matter (DM) in the framework of freeze-in at stronger coupling. This scenario assumes that the Standard Model thermal bath temperature has always be…
hep-ph2026
Sterile neutrino dark matter in conformal Majoron models
João Gonçalves, Danny Marfatia, António P. Morais +2
We study sterile neutrino dark matter (DM) in a classically conformal U(1)' extension of the Standard Model with three right-handed neutrinos and a Majoron-like singlet scalar that…
hep-ph2024
Invisible Higgs decay from dark matter freeze-in at stronger coupling
Oleg Lebedev, António P. Morais, VinÃcius Oliveira +1
We study the Higgs boson decay into dark matter (DM) in the framework of freeze-in at stronger coupling. Even though the Higgs-DM coupling is significant, up to order one, DM does…