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arXiv 1012.5288hep-phhep-th
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小Skyrmion:小希格斯模型的新暗物质

The Little Skyrmion: New Dark Matter for Little Higgs Models

Marc Gillioz, Andreas von Manteuffel, Pedro Schwaller, Daniel Wyler

摘要:

我们在最小希格斯模型中研究skyrmions,并讨论它们作为暗物质候选者的可能作用。稳定的大质量skyrmion也可以存在于最小的希格斯模型中,即使没有精确的宇称对称,因为它们携带了一个保守的拓扑荷,这是由于SU(5)/SO(5)陪集的非平凡第三同伦群。我们发现在这个陪集球对称skyrmion解决方案。分析了规范场对skyrmion解的影响,发现skyrmion质量存在一个上界。对于合理的参数选择,遗迹丰度与观测到的暗物质密度是一致的。

英文摘要:

We study skyrmions in the littlest Higgs model and discuss their possible role as dark matter candidates. Stable massive skyrmions can exist in the littlest Higgs model also in absence of an exact parity symmetry, since they carry a conserved topological charge due to the non-trivial third homotopy group of the SU(5)/SO(5) coset. We find a spherically symmetric skyrmion solution in this coset. The effects of gauge fields on the skyrmion solutions are analyzed and found to lead to an upper bound on the skyrmion mass. The relic abundance is in agreement with the observed dark matter density for reasonable parameter choices.

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