Non-Abelian Yang-Mills-Higgs vortices

Details Non-Abelian Yang-Mills-Higgs vortices Non-Abelian Yang-Mills-Higgs vortices

2009-09-23

arxiv.org/abs/0909.4220v2

Physics

High Energy Physics

High Energy Physics - Theory

4 pages, 4 figures, RevTeX style; new references added; issue of stability revised; accepted for publication in PRD

Scientific paper

In this Letter we present new, genuinely non-Abelian vortex solutions in SU(2) Yang-Mills--Higgs theory with only one {\it isovector} scalar field. These non-Abelian solutions branch off their Abelian counterparts (Abrikosov-Nielsen-Olesen vortices) for precise values of the Higgs potential coupling constant $\lambda$. For all values of $\lambda$, their energies lie below those of the Abelian energy profiles, the latter being logarithmically divergent as $\lambda\to\infty$. The non-Abelian branches plateau in the limit $\lambda\to\infty$ and their number increases with $\lambda$, this number becoming infinite. For each vorticity, the gaps between the plateauing energy levels become constant. In this limit the non-Abelian vortices are non-interacting and are described by the {\it self-dual} vortices of the O(3) sigma model. In the absence of a topological lower bound, we expect these non-Abelian vortices to be {\it sphalerons}.

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