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Vortices, symmetry breaking, and temporary confinement in SU(2) gauge-Higgs theory
Phys. Rev. D 74, 014502 – Published 5 July, 2006
DOI: https://doi.org/10.1103/PhysRevD.74.014502
Abstract
We further investigate center vortex percolation and Coulomb gauge remnant symmetry breaking in the SU(2) gauge-Higgs model. We show that string breaking is visible in Polyakov line correlators on the center-projected lattice, that our usual numerical tests successfully relate P-vortices to center vortices, and that vortex removal removes the linear potential, as in the pure-gauge theory. This data suggests that global center symmetry is not essential to the vortex confinement mechanism. But we also find that the line of vortex percolation-depercolation transitions, and the line of remnant symmetry-breaking transitions, do not coincide in the SU(2)-Higgs phase diagram. This nonuniqueness of transition lines associated with nonlocal order parameters favors a straightforward interpretation of the Fradkin-Shenker theorem, namely: there is no unambiguous distinction, in the SU(2) gauge-Higgs models, between a “confining” phase and a Higgs phase.
Article Text
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