12 papers
Monopoles, Strings, Walls and Gravitational waves
Rinku Maji, Qaisar Shafi
The gauge symmetry breaking successively produces monopoles, strings and domain walls bounded by strings (WBS), with the elementary monopole carrying…
Neutrino masses, , and in SO(10)
Shaikh Saad, Qaisar Shafi
We explore the leptonic sector of a recently proposed supersymmetric SO(10) model with supersymmetry breaking in the 3-10 TeV range. A new ingredient in this work is the requiremen…
Superconducting Strings in
Rinku Maji, Qaisar Shafi
We discuss the appearance of superconducting strings in grand unification, keeping track of the magnetic monopole flux that precedes the formation of the string flux tube. Th…
Fermion masses and mixings in supersymmetric SO(10) with third-generation quasi-Yukawa unification
Shaikh Saad, Qaisar Shafi
We discuss the charged and neutral fermion masses and mixings in a supersymmetric SO(10) model with a minimal Higgs sector consisting of the multiplets , , and $16_H +…
Split supersymmetry and hybrid inflation in light of Atacama Cosmology Telescope DR6 data
Nobuchika Okada, Qaisar Shafi
Inspired by the recent measurement of the scalar spectral index, , by the Atacama Cosmology Telescope (ACT) DR6 data, we present an update on the split sup…
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…