200 citations · 1.8k across the 55 of their papers we have counts for
5 papers · 1 filter
Massive hidden photons as lukewarm dark matter
Marieke Postma, Javier Redondo
We study the possibility that a keV-MeV mass hidden photon (HP), i.e. a hidden sector U(1) gauge boson, accounts for the observed amount of dark matter. We focus on the case where…
Axionic D3-D7 Inflation
C. P. Burgess, J. M. Cline, M. Postma
We study the motion of a D3 brane moving within a Type IIB string vacuum compactified to 4D on K3 x T_2/Z_2 in the presence of D7 and O7 planes. We work within the effective 4D sup…
Racetrack Inflation and Cosmic Strings
Philippe Brax, Carsten van de Bruck, Anne-Christine Davis +3
We consider the coupling of racetrack inflation to matter fields as realised in the D3/D7 brane system. In particular, we investigate the possibility of cosmic string formation in…
SUGRA chaotic inflation and moduli stabilisation
Stephen C. Davis, Marieke Postma
Chaotic inflation predicts a large gravitational wave signal which can be tested by the upcoming Planck satellite. We discuss a SUGRA implementation of chaotic inflation in the pre…
Successfully combining SUGRA hybrid inflation and moduli stabilisation
Stephen C. Davis, M. Postma
Inflation and moduli stabilisation mechanisms work well independently, and many string-motivated supergravity models have been proposed for them. However a complete theory will con…