40 citations · 145 across the 13 of their papers we have counts for
13 papers
Hybrid Inflation, Reheating and Dark Radiation in a IIB perturbative moduli stabilization scenario
Waqas Ahmed, Athanasios Karozas, George K. Leontaris +1
We study the cosmological implications of an effective field theory model derived within a configuration of D7 brane stacks in the framework of type-IIB string theory. We consider…
Smooth Hybrid Inflation with Low Reheat Temperature and Observable Gravity Waves in Super-GUT
Waqas Ahmed, Athanasios Karozas, George K. Leontaris +1
We realize smooth hybrid inflation in the framework of supersymmetric model which provides a natural solution to the monopole problem appearing…
models with a vector-like fermion family
A. Karozas, G. K. Leontaris, I. Tavellaris
Motivated by experimental measurements indicating deviations from the Standard Model predictions we discuss F-theory inspired models, which, in addition to the three chiral generat…
Gravitino Dark matter, Non Thermal Leptogenesis and Low reheating temperature in No-scale Higgs Inflation
Waqas Ahmed, Athanasios Karozas, George K. Leontaris
We revisit Higgs inflation in the framework of a minimal extension of the Standard Model gauge symmetry by a factor. Various aspects are taken into account with partic…
Low Scale String Theory Benchmarks for Hidden Photon Dark Matter Interpretations of the XENON1T Anomaly
Athanasios Karozas, Stephen F. King, George K. Leontaris +1
An excess of low-energy electronic recoil events over known backgrounds was recently observed in the XENON1T detector, where events are observed compared to an expected $232…
On the LHC signatures of F-theory motivated models
A. Karozas, G. K. Leontaris, I. Tavellaris +1
We study low energy implications of F-theory GUT models based on extended by a symmetry which couples non-universally to the three families of quarks and leptons. T…