3 citations · 9 across the 14 of their papers we have counts for
10 papers · 1 filter
Localized Neutrinos in Two Dark Dimensions
Waqas Ahmed, George K. Leontaris
We study neutrino masses in a six-dimensional framework with two compact dark dimensions. In the conventional flat-bulk realization, the sterile-neutrino zero mode is strongly volu…
Kaluza--Klein Dark-Photon Mediation of Inelastic Dark Matter at LUX-ZEPLIN
Waqas Ahmed, George K. Leontaris
We study a five-dimensional realization of endothermic dark matter motivated by the recent high-recoil LUX-ZEPLIN event. A pseudo-Dirac Standard-Model singlet fermion is localized…
A Dark-Dimension Origin of Geometric Inelastic Dark Matter: The LUX-ZEPLIN High-Recoil Event and Multi-Target Tests
Waqas Ahmed, George K. Leontaris
The extended nuclear-recoil analysis of LUX-ZEPLIN (LZ) has reported one event compatible with a recoil energy near keV, motivating endothermic dark-matter scenarios with sup…
Secondary Gravitational Wave Signatures from 5D Rotating Primordial Black Holes in the Dark Dimension
Waqas Ahmed, George K. Leontaris
We investigate five-dimensional rotating primordial black holes (PBHs) as dark matter candidates within the Dark Dimension (DD) scenario motivated by the Swampland Program. In this…
F-Term Hybrid Inflation with T-Model Kähler Geometry and Beyond
Waqas Ahmed, Constantinos Pallis, Mansoor Ur Rehman
We analyze F-term hybrid inflation (FHI) within various grand unified theories (GUTs) in the presence of a Kähler potential for the inflaton field which parameterizes the Kähler ma…
Radiatively Corrected Hybrid Inflation: Parameter Scans and Machine Learning with ACT and Future CMB Experiments
Waqas Ahmed, Saleh O. Allehabi, Mansoor Ur Rehman
We investigate a realistic non-supersymmetric hybrid inflation model incorporating right-handed neutrinos and assess its viability in light of recent cosmological observations. At…
GUT-Scale Smooth Hybrid Inflation with a Stabilized Modulus in Light of ACT and SPT Data
Waqas Ahmed, Constantinos Pallis, Mansoor Ur Rehman
We analyze a generalized framework of smooth F-term hybrid inflation (smFHI) consistent with gauge coupling unification within the Minimal Supersymmetric Standard Model (MSSM). The…
Revisiting Polynomial Hybrid Inflation: Planck and ACT Compatibility via Radiative Corrections
Waqas Ahmed, Saleh O. Allehabi, Mansoor Ur Rehman
We investigate the impact of one-loop radiative corrections in a non-supersymmetric model of hybrid inflation with a chaotic (polynomial-like) potential,, in…
Tribrid Inflation, Type II Leptogenesis, and Observable Gravitational Waves in
Waqas Ahmed, Saleh O. Allehabi, Farishta Israr +1
We present a concrete realization of tribrid inflation within the framework of the gauge group . In this model, inflation i…
Inflation, Proton Decay and Gravitational Waves from Metastable Strings in Model
Waqas Ahmed, Maria Mehmood, Mansoor Ur Rehman +1
We present a realistic supersymmetric -hybrid inflation model within the framework of gauge symmetry, wherein the symmetry breaking $SU(4)…