Superconducting cosmic string loops emit vector radiation whose strength is fitted in this paper; including this channel suppresses the predicted gravitational wave background for strong coupling and can make the spectrum compatible with NANOGrav for large currents.
Collisions of cosmic strings with chiral currents
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abstract
We present an analytic study of cosmic superconducting chiral string collisions in Minkowski space, applying the kinematic constraints that arise from the relevant generalization of the Nambu-Goto action. In particular, we revisit the solution for chiral superconducting cosmic strings and demonstrate that Y junction production for such strings is possible. We consider the collision of chiral current-carrying straight strings and obtain the region in angle-velocity space that allows the production of string junctions. This study contributes to the understanding of the complex evolution of chiral superconducting string networks.
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Stochastic Gravitational Wave Background from Chiral Superconducting Cosmic Strings
Superconducting cosmic string loops emit vector radiation whose strength is fitted in this paper; including this channel suppresses the predicted gravitational wave background for strong coupling and can make the spectrum compatible with NANOGrav for large currents.