5 papers
Testing -attractor P-model of inflation by Cosmic Microwave Background radiation
Michał Marciniak, Marek Olechowski, Stefan Pokorski
In a recently proposed approach to testing models of inflation by Cosmic Microwave Background (CMB) radiation the reheating temperature is directly expressed in terms of the CMB ob…
Quark, lepton and right-handed neutrino production via inflation
Duarte Feiteira, Fotis Koutroulis, Oleg Lebedev +1
Inflationary expansion of space-time provides us with an efficient particle production mechanism in the Early Universe. The fermion production efficiency depends critically on the…
Dark Branes for Dark Matter
Fotis Koutroulis, Eugenio Megias, Stefan Pokorski +1
We propose a setup for the origin of dark matter based on spacetime with a warped extra dimension and three branes: the Planck brane, the TeV brane, at a (few) TeV scale , and…
Gravitational production of sterile neutrinos
Fotis Koutroulis, Oleg Lebedev, Stefan Pokorski
We consider gravitational production of singlet fermions such as sterile neutrinos during and after inflation. The production efficiency due to classical gravity is suppressed by t…
Phases of Pseudo-Nambu-Goldstone Bosons
Fotis Koutroulis, Matthew McCullough, Marco Merchand +2
We study the vacuum dynamics of pseudo-Nambu-Goldstone bosons (pNGBs) for spontaneous and explicit symmetry breaking. We determine the magnitude of expl…