648 citations · 7.2k across the 227 of their papers we have counts for
227 papers
Magnetic monopoles and high frequency gravitational waves from quasi-stable strings
Rinku Maji, Qaisar Shafi
The spontaneous breaking of via flipped to the Standard Model yields a novel scenario in which the superheavy topologically stable GUT monopole carrying a single u…
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…
Superheavy quasi-stable strings and walls bounded by strings in the light of NANOGrav 15 year data
George Lazarides, Rinku Maji, Qaisar Shafi
Composite topological structures such as superheavy "quasi-stable strings" (QSS) and "walls bounded by strings" (WBS) arise in realistic extensions of the Standard Model of high en…
A Predictive Model
George Lazarides, Rinku Maji, Rishav Roshan +1
We discuss some testable predictions of a non-supersymmetric model supplemented by a Peccei-Quinn symmetry. We utilize a symmetry breaking pattern of that yields…
Monopoles, Strings and Gravitational Waves in Non-minimal Inflation
Rinku Maji, Qaisar Shafi
We discuss how in grand unification an observable number density of topologically stable intermediate mass ( GeV) monopoles survive inflation driven by a Co…
Axions, WIMPs, proton decay and observable in
Nobuchika Okada, Digesh Raut, Qaisar Shafi
We explore some experimentally testable predictions of an axion model which includes two 10-plets of fermions in order to resolve the axion domain wall problem. The axion…