260 citations · 1.9k across the 67 of their papers we have counts for
11 papers · 2 filters
Primordial black holes and scalar-induced gravitational waves in the supersymmetric 331 model from SU(6)
Imtiaz Khan, Niamat Ullah, Ali Muhammad +4
We study primordial black holes and scalar-induced gravitational waves in the supersymmetric 331 model based on SU(6). The inflaton continues to be the D-flat radial combination of…
Elastic toroidal vector dark matter through a dark photon in the LUX-ZEPLIN high recoil window
Imtiaz Khan, Salvatore Capozziello, G. Mustafa +4
The 2026 LUX-ZEPLIN search reports one nuclear recoil candidate at in an extended window reaching about . We con…
LZ-Motivated Pseudo-Dirac Higgsinos in the Supersymmetric 331 Model from the Supersymmetric \texorpdfstring{}{SU(6)} GUT Model
Imtiaz Khan, Ali Muhammad, G. Mustafa +3
The high-recoil event reported by LUX--ZEPLIN motivates a neutral electroweak state with an inelastic splitting in the sub-MeV range. We propose supersymmetric 331 model from the s…
Nuclear interference versus dark sector excitation in the 248 keV LUX-ZEPLIN recoil candidate
Imtiaz Khan, Salvatore Capozziello, G. Mustafa +3
The 2026 LUX-ZEPLIN (LZ) high energy nuclear recoil search reports one event at and finds the elastic isovector interaction $\math…
Finite-duration non-slow-roll effects in inflationary production of ultralight vector dark matter
Imtiaz Khan, Niamat Ullah, Chengxun Yuan +3
Inflationary production of ultralight vector dark matter can be amplified by a brief non-slow-roll phase, yet instantaneous mass transitions generate ultraviolet ringing and leave…
Coherent and Stochastic Axion Dark Matter from Thermal Relaxation
Shahid Hussain Gurmani, Arzu Cilli, Phongpichit Channuie +3
An axion driven toward a thermal minimum need not remain a coherent condensate. We derive the coupled attenuation of the field mean and production of stochastic momentum modes in a…
Thermal Alignment as a Pathway to Axion Dark Matter
Imtiaz Khan, G. Mustafa, Chengxun Yuan +3
Thermal alignment cannot be inferred from the axion mean alone because the dissipative bath that erases the initial displacement also prepares field and momentum fluctuations. We d…
Parametric Resonance of Higgsed Vector Dark Matter: Inflationary Initial Conditions and Sourced Displacements
Imtiaz Khan, Salvatore Capozziello, G. Mustafa +2
Parametric resonance in a Higgsed Abelian sector provides an efficient mechanism for producing vector dark matter, but its viability depends crucially on the origin of the initial…
CMB Test of the Higgs Origin of Dark-Photon Dark Matter
Imtiaz Khan, Salvatore Capozziello, G. Mustafa +2
Laboratory searches determine the mass and kinetic mixing of dark-photon dark matter. The CMB isocurvature probes how its abundance depends on inflationary initial conditions. We f…
Long Inflation Screens Euclidean-Wormhole Initial States
Imtiaz Khan, Pirzada, G. Mustafa +2
Euclidean wormholes can prepare inflation in non--Bunch--Davies initial states, but long Lorentzian expansion screens this memory from the CMB. We derive a visibility bound for Euc…
Dilaton-Induced Resonant Production of Ultralight Vector Dark Matter
Imtiaz Khan, G. Mustafa, Jehanzad Zafar +3
We consider the production of ultralight vector dark matter through a dilatonic half-mass resonance in the presence of an oscillating spectator scalar. The cosmological condition i…