On stability of fermionic superconducting current in cosmic string

A bstract Recently, the chiral superconductivity of cosmic string in axion model has gathered attention. The superconductive nature can alter standard understanding cosmology model. For example, a loop with sizable super-conducting current become stable configuration, which is called Vorton. also affect cosmological evolution network. In this paper, we study stability superconducting string. We find indeed for straight or infinitely small core size, even if carrier particles are unstable vacuum. However that particle decays curved typical models, Accordingly, lifetime Vorton not far from