STABLE, SPINNING EMBEDDED VORTICES

The spinning vortex is a stationary generalization of the Nielsen-Oles en vortex involving a linear time dependence of the Goldstone boson. H ere we show that this vortex can be embedded in models with SU(2)globa l X U(1)local symmetry. We also map the stability sector in parameter space and show that for sufficiently large spinning velocities the vor tex is stable for any value of the Higgs self-coupling parameter beta. This is a significant improvement of stability compared to the semilo cal vortex introduced by Vachaspati and Achucarro which is stable only for beta < 1. This result may have significant implications for elect roweak vortices.