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Ahmad Moursy on Muck Rack

Ahmad Moursy

As seen in: Physical Review B
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Articles

Semivisible dark photon in a model with vectorlike leptons for the $(g\ensuremath{-}2{)}_{e,\text{ }\ensuremath{\mu}}$ and $W$-boson mass anomalies

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By Waleed Abdallah, Mustafa Ashry, Junichiro Kawamura, Ahmad Moursy
| Physical Review B
We propose a model that realizes a semivisible dark photon which can contribute to the anomalous magnetic moment (g−2) of both electron and muon. In this model, the electron g−2 is deviated from the Standard Model (SM) prediction by the 1-loop diagrams involving the vectorlike leptons, while that of muon is deviated due to a nonvanishing gauge kinetic mixing with photons.
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Cosmological probes of grand unification: Primordial black holes and scalar-induced gravitational waves

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By Anish Ghoshal, Qaisar Shafi, Ahmad Moursy
| Physical Review B
We investigate the inflationary cosmology involving an SU(5) GUT (grand unified theory) singlet scalar with nonminimal coupling to the Ricci scalar. In this scenario the scale of grand unification is set by the inflaton vacuum expectation value when the inflaton rolls down its potential towards its minimum v, thereby relating inflationary dynamics to GUT symmetry breaking with a prediction of r≃0.025 for the tensor-to-scalar ratio to be tested by the next generation of CMB experiments.
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