Two species of semi-local cosmic strings in Abelian gauged ${\mathbb{CP}}^2$-sigma models coupled to gravity

A. Alonso-Izquierdo, W. García Fuertes, J. Mateos Guilarte

We study a semi-local Abelian Higgs sigma model with ${\mathbb{CP}}^2$-valued scalar fields coupled to gravity. We establish the conditions needed for self-duality in this system and…