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Adiabatic out-of-equilibrium solutions to the Boltzmann equation in warm inflation
Mar Bastero-Gil, Arjun Berera, Rudnei O. Ramos +1
We show that, in warm inflation, the nearly constant Hubble rate and temperature lead to an adiabatic evolution of the number density of particles interacting with the thermal bath…
Scalar field dark matter with spontaneous symmetry breaking and the keV line
Catarina Cosme, João G. Rosa, O. Bertolami
We show that the present dark matter abundance can be accounted for by an oscillating scalar field that acquires both mass and a non-zero expectation value from interactions with t…
Stimulated axion decay in superradiant clouds around primordial black holes
Joao G. Rosa, Thomas W. Kephart
The superradiant instability can lead to the generation of extremely dense axion clouds around rotating black holes. We show that, despite the long lifetime of the QCD axion with r…