162 citations · 1.2k across the 52 of their papers we have counts for
10 papers · 1 filter
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…
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…
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 +…
Supersymmetric Hybrid Inflation in light of Atacama Cosmology Telescope Data Release 6, Planck 2018 and LB-BK18
Mansoor Ur Rehman, Qaisar Shafi
Supersymmetry-based hybrid inflation models (referred to as `spontaneously broken supersymmetry' by the Planck collaboration) are attractive for several reasons, including the appe…
Superheavy Metastable Strings in SO(10)
Rinku Maji, Qaisar Shafi
The spontaneous breaking of grand unified symmetry to yields the GUT monopole as well as a comparably heavy m…
Magnetic Monopoles and Exotic States in
Thomas W. Kephart, Qaisar Shafi
In the Pati-Salam gauge symmetry (4-2-2, for short), the observed quarks and leptons of each family reside in the bi-fundamental representat…
C-parity, magnetic monopoles and higher frequency gravitational waves
Rinku Maji, Qaisar Shafi
We consider the spontaneous breaking of grand unified symmetry to the left-right symmetric model with C-parity al…
-Hybrid Inflation and Metastable Cosmic Strings in
Muhammad Nadeem Ahmad, Maria Mehmood, Mansoor Ur Rehman +1
We develop a scenario based on -hybrid inflation within the framework of a left-right symmetric model defined by the gauge symmetry group $G_{3221} = SU(3)_c \times SU(2)_L \tim…