Revisiting Metastable Cosmic String Breaking

Akifumi Chitose, Masahiro Ibe, Yuhei Nakayama +2

Metastable cosmic strings appear in models of new physics with a two-step symmetry breaking $G\to H\to 1$, where ${\pi }_1(H)\ne 0$ and ${\pi }_1(G)=0$. They decay via the monopole-antimono…