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arXiv 0705.1146hep-th
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D+1维Goldstone模型,D= 3,4,5,支持稳定和零拓扑电荷解

Goldstone models in D+1 dimensions, D=3,4,5, supporting stable and zero topological charge solutions

Eugen Radu, D. H. Tchrakian

摘要:

研究了D+1维时空中由等矢量标量场描述的整体对称破缺Goldstone模型的有限能量静态解。在D= 3,4,5的情况下,数值构造了任意缠绕数的拓扑稳定多孤子和零拓扑荷孤子-反孤子解.我们探讨了D= 3,4,5,6中存在多孤子对和孤子-反孤子对时系统所应服从的对称性类型。这些研究结果的基础上构建的数值解的$D\le 5$的例子。在轴对称条件下,偶D中只存在所有拓扑荷的多孤子解,奇D中只存在零拓扑荷和单位拓扑荷解。使系统服从比轴对称更弱的对称性,会导致所有维度中所有可能性的存在。我们的研究结果也适用于有限的“能量”的解决方案杨-米尔斯和杨-米尔斯-希格斯系统,并在原则上也西格玛模型。

英文摘要:

We study finite energy static solutions to a global symmetry breaking Goldstone model described by an isovector scalar field in D+1 spacetime dimensions. Both topologically stable multisolitons with arbitrary winding numbers, and zero topological charge soliton--antisoliton solutions are constructed numerically in D=3,4,5. We have explored the types of symmetries the systems should be subjected to, for there to exist multisoliton and soliton--antisoliton pairs in D=3,4,5,6. These findings are underpinned by constructing numerical solutions in the $D\le 5$ examples. Subject to axial symmetry, only multisolitons of all topological charges exist in even D, and in odd D, only zero and unit topological charge solutions exist. Subjecting the system to weaker than axial symmetries, results in the existence of all the possibilities in all dimensions. Our findings apply also to finite 'energy' solutions to Yang--Mills and Yang-Mills--Higgs systems, and in principle also sigma models.

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