Matryoshka Skyrmions
arXiv:1211.4916 · doi:10.1016/j.nuclphysb.2013.03.003
Abstract
We construct a stable Skyrmion in 3+1 dimensions as a sine-Gordon kink inside a domain wall within a domain wall in an O(4) sigma model with hierarchical mass terms without the Skyrme term. We also find that higher dimensional Skyrmions can stably exist with a help of non-Abelian domain walls in an O(N) model with hierarchical mass terms without a Skyrme term, which leads a matryoshka structure of Skyrmions.
14 pages, 3+1 figures, v2: references added, published version
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