32 citations · 160 across the 17 of their papers we have counts for
17 papers
Waterfall phase in supersymmetric hybrid inflation
Ahmad Moursy, Qaisar Shafi
We explore a class of realistic supersymmetric hybrid inflation models with a predicted scalar spectral index , which is in good agreement with the recent A…
Induced gravitational waves, metastable cosmic strings and primordial black holes in GUTs
Rinku Maji, Ahmad Moursy, Qaisar Shafi
We explore the cosmological and astrophysical implications of a realistic hybrid inflation model based on flipped . The model contains superheavy metastable cosmic strings a…
Primordial monopoles, black holes and gravitational waves
Ahmad Moursy, Qaisar Shafi
We show how topologically stable superheavy magnetic monopoles and primordial black holes can be generated at observable levels by the waterfall field in hybrid inflation models ba…
Inflation, superheavy metastable strings and gravitational waves in non-supersymmetric flipped SU(5)
George Lazarides, Rinku Maji, Ahmad Moursy +1
Motivated by the NANOGrav 15 year data and other recent investigations of stochastic gravitational background radiation based on pulsar timing arrays, we show how superheavy string…
Semi-visible dark photon in a model with vector-like leptons for the and -boson mass anomalies
Waleed Abdallah, Mustafa Ashry, Junichiro Kawamura +1
We propose a model realizes that a semi-visible dark photon which can contribute to the anomalous magnetic moment () of both electron and muon. In this model, the electron $g-…
Cosmological probes of Grand Unification: Primordial Blackholes & scalar-induced Gravitational Waves
Anish Ghoshal, Ahmad Moursy, Qaisar Shafi
We investigate the inflationary cosmology involving an SU(5) GUT (grand unified theory) singlet scalar with non-minimal coupling to the Ricci scalar. In this scenario the scale of…
Modified hybrid inflation, reheating and stabilization of the electroweak vacuum
Merna Ibrahim, Mustafa Ashry, Esraa Elkhateeb +2
We propose a modification to the standard hybrid inflation model \cite{Linde:1993cn}, that connects a successful hybrid inflation scenario to the standard model Higgs sector, via t…
Cosmological Imprints of SUSY Breaking in Models of Sgoldstinoless Non-Oscillatory Inflation
Lucien Heurtier, Ahmad Moursy, Lucien Wacquez
In supergravity, the dynamics of the sgoldstino -- superpartner of the goldstino superfield associated with the breaking of supersymmetry at low energy -- can substantially modify…
No-scale gauge non-singlet inflation inducing TeV scale inverse seesaw mechanism
Ahmad Moursy
We develop a model of sneutrino inflation that is charged under gauge symmetry in no-scale supergravity framework. The model provides an interesting modification of tr…
No-scale hybrid inflation with R-symmetry breaking
Ahmad Moursy
In this paper we provide a no-scale supergravity scenario of hybrid inflation with R-symmetry being broken maximally. We investigate the inflation dynamics in details in both cases…
A inspired inflation model in no-scale Supergravity
Shaaban Khalil, Ahmad Moursy, Abhijit Kumar Saha +1
We consider a cosmological inflation scenario based on a no-scale supergravity sector with symmetry. It is shown that a tree level symmetric superpotential alone…
Sneutrino driven GUT Inflation in Supergravity
Tomas E. Gonzalo, Lucien Heurtier, Ahmad Moursy
In this paper, we embed the model of flipped GUT sneutrino inflation -in a flipped SU(5) or SO(10) set up- developed by Ellis et al. in a supergravity framework. The GUT symmetry i…
Aspects of moduli stabilization in type IIB string theory
Shaaban Khalil, Ahmad Moursy, Ali Nassar
We review moduli stabilization in type IIB string theory compactification with fluxes. We focus on the KKLT and Large Volume Scenario (LVS). We show that the predicted soft SUSY br…
Single Field Inflation in Supergravity with a Gauge Symmetry
Lucien Heurtier, Shaaban Khalil, Ahmad Moursy
A single field inflation based on a supergravity model with a shift symmetry and extension of the MSSM is analyzed. We show that one of the real components of the two …
Higgs Vacuum Stability in extended Standard Model
Alakabha Datta, A. Elsayed, S. Khalil +1
We study vacuum stability of B-L extension of the Standard Model (SM) and its supersymmetric version. We show that the generation of non-vanishing neutrino masses through TeV inver…
Right-handed sneutrino-antisneutrino oscillations in a TeV scale Supersymmetric B-L model
A. Elsayed, S. Khalil, S. Moretti +1
We explore right-handed sneutrino-antisneutrino mixing in a TeV scale B-L extension of the Minimal Supersymmetric Standard Model (MSSM), (B-L)SSM, where a type I seesaw mechanism o…
Radion Flavor Violation in Warped Extra Dimension
K. Huitu, S. Khalil, A. Moursy +2
We analyze the flavor violation in warped extra dimension due to radion mediation. We show that ΔS=2 and ΔB=2 flavor violating processes impose stringent constraints on radion mass…