6 citations · 10 across the 16 of their papers we have counts for
20 papers
Onset of Chaos and Orbital Instabilities around Rotating Weyl Black Holes
Shubham Kala, M. Yousaf, Pradeep Singh +3
We investigate nonlinear photon motion in the vicinity of a rotating black hole (BH) within Weyl conformal gravity (WCG) by employing Poincare sections, Lyapunov exponents, Fast Ly…
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…
Energy extraction processes and thermodynamics in rotating Weyl conformal black holes
Dilmurod Ortiqboev, Farruh Atamurotov, Ahmadjon Abdujabbarov +2
This work investigates the original Penrose process (PP), as well as black hole (BH) thermodynamics, within the framework of conformal Weyl gravity. The theory is characterized by…
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…
Probing Quantum Gravity through Chaotic Orbits and Strong-Field Effects in Kerr Black Holes Embedded in Perfect Fluid Dark Matter
Shubham Kala, Sara Saghafi, M. Yousaf +4
We study the nonlinear photon dynamics in quantum improved rotating black hole surrounded by perfect fluid dark matter (PFDM) using several methods of analysis, including Poincaré…
Conformal dark matter and MHz gravitational waves
Imtiaz Khan, Niamat Ullah, Salvatore Capozziello +2
A localized enhancement of the primordial curvature spectrum can leave two distinct relics: gravitationally produced conformal-fermion dark matter and a scalar-induced stochastic g…
Scalar and Electromagnetic Perturbations around a Black Hole with a Topological Defect: Quasinormal Modes and Quasi-bound States in a Plasma Medium
Dilmurod Umarov, Farruh Atamurotov, Ahmadjon Abdujabbarov +2
We investigated the influence of a plasma environment on the optical and perturbative properties of a black hole with a topological defect, characterized by the parameter \(k\). We…
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…
Disformal Kerr Imprints on BHL Accretion: Shock Morphology, PSD Signatures, and Observational QPO Counterparts
Orhan Donmez, M. Yousaf, Imtiaz Khan +1
We reveal the effect of the spacetime parameters on the accretion morphology formed through the BHL mechanism around a slowly rotating disformal Kerr black hole. Thus, we investiga…
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
A dilatonic half-mass resonance can produce ultralight vector dark matter only if the Floquet instability becomes efficient before the oscillating spectator scalar dominates the co…
Post-Inflationary Quenched Production of Axion SU(2) Dark Matter
Imtiaz Khan, Pirzada, G. Mustafa
The relic abundance of vector dark matter originating from an inherited axion- condensate is typically determined by implementing an adiabatic matching procedure across the…
Dynamics, Ringdown, and Accretion-Driven Multiple Quasi-Periodic Oscillations of Kerr-Bertotti-Robinson Black Holes
G. Mustafa, Orhan Donmez, Dhruba Jyoti Gogoi +3
We study the motion of test particles around the Kerr--Bertotti--Robinson (KBR) black hole (BH) and explore how the three defining parameters, the mass , rotation parameter ,…
Spacetime Foam Effects on Charged AdS Black Hole Thermodynamics
Yahya Ladghami, Aatifa Bargach, Amine Bouali +2
In this paper, we investigate the emergent thermodynamic phenomena arising from spacetime foam and its impact on black hole behavior. Within this framework, we adopt the Barrow mod…
Holographic Thermodynamics of BTZ Black Holes and Tsallis Entropy
Yahya Ladghami, Brahim Asfour, Amine Bouali +2
This paper presents a detailed study of the thermodynamics of charged BTZ black holes using the conformal holographic extended thermodynamics formalism and Tsallis statistics. The…