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…
Inflation from a No-scale supersymmetric model
Waqas Ahmed, Athanasios Karozas
We study inflation in a supersymmetric Pati-Salam model driven by a potential generated in the context of no-scale supergravity. The Pati-Salam gauge group $SU(4)_{c}\times{SU(2)_{…
Vectorlike Particles, and Yukawa Unification in F-theory inspired
Athanasios Karozas, George K. Leontaris, Qaisar Shafi
We explore the low energy implications of an F-theory inspired model whose breaking yields, in addition to the MSSM gauge symmetry, a gauge boson associated with a $U(1)…
R-Parity violation in F-Theory
Miguel Crispim Romão, Athanasios Karozas, Stephen F. King +2
We discuss R-parity violation (RPV) in semi-local and local F-theory constructions. We first present a detailed analysis of all possible combinations of RPV operators arising from…
750 GeV Diphoton excess from in F-theory GUTs
Athanasios Karozas, Stephen F. King, George K. Leontaris +1
We interpret the 750-760 GeV diphoton resonance as one or more of the spinless components of a singlet superfield arising from the three 27-dimensional representations of in…
MSSM from F-theory SU(5) with Klein Monodromy
Miguel Crispim Romão, Athanasios Karozas, Stephen F. King +2
We revisit a class of SUSY GUT models which arise in the context of the spectral cover with Klein Group monodromy . We show that matter parities ca…
Phenomenological implications of a minimal F-theory GUT with discrete symmetry
Athanasios Karozas, Stephen F. King, George K. Leontaris +1
We discuss the origin of both non-Abelian discrete family symmetry and Abelian continuous family symmetry, as well as matter parity, from F-theory SUSY GUTs. We propose a minimal m…
Discrete Family Symmetry from F-Theory GUTs
Athanasios Karozas, Stephen F. King, George K. Leontaris +1
We consider realistic F-theory GUT models based on discrete family symmetries and , combined with GUT, comparing our results to existing field theory models base…