Nonsingular stationary global strings

@article{Verbin2004NonsingularSG,
  title={Nonsingular stationary global strings},
  author={Yosef Verbin and Arne L. Larsen},
  journal={Physical Review D},
  year={2004},
  volume={70}
}
A field-theoretical model for nonsingular global cosmic strings is presented. The model is a nonlinear sigma model with a potential term for a self-gravitating complex scalar field. Nonsingular stationary solutions with angular momentum and possibly linear momentum are obtained by assuming an oscillatory dependence of the scalar field on t, {phi}, and z. This dependence has an effect similar to gauging the global U(1) symmetry of the model, which is actually a Kaluza-Klein reduction from four… 

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