7 papers
Ultraviolet completion of Starobinsky inflation
Ignatios Antoniadis, Chrysoula Markou, Dimitri V. Nanopoulos
We construct an supergravity action whose bosonic part contains an arbitrary function of the scalar curvature, the so-called gravity. As in supergravity, it ca…
--Inflation Derived from 4d Strings, the Role of the Dilaton, and Turning the Swampland into a Mirage
Ignatios Antoniadis, Dimitri V. Nanopoulos, Keith A. Olive
Based on a previously derived superstring model possessing a cosmological sector that mimics Starobinsky inflation, we analyze several questions addressed in the recent literature:…
A Perturbatively Stable Non-Supersymmetric String Model with AdS Vacuum
Ignatios Antoniadis, Alonzo R. Diaz Avalos, Alon E. Faraggi
We present a construction of a perturbatively stable non-supersymmetric type II closed string model in four dimensions. It is based on a freely acting Scherk-Schwarz Z2-deformation…
SUSY at the FPF
Luis A. Anchordoqui, Ignatios Antoniadis, Karim Benakli +2
Experimental searches for supersymmetry (SUSY) are entering a new era. The failure to observe signals of sparticle production at the Large Hadron Collider (LHC) has eroded the cent…
Through the Looking Glass into the Dark Dimension: Searching for Bulk Black Hole Dark Matter with Microlensing of X-ray Pulsars
Luis A. Anchordoqui, Ignatios Antoniadis, Dieter Lust +1
Primordial black holes (PBHs) hidden in the incredible bulk of the dark dimension could escape constraints from non-observation of their Hawking radiation. Since these five-dimensi…
Bulk Black Hole Dark Matter
Luis A. Anchordoqui, Ignatios Antoniadis, Dieter Lust +1
The dark dimension provides a mechanism to resolve the cosmological hierarchy problem and assembles a colosseum for dark matter contenders. In a series of recent publications we in…