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arXiv 1909.07447hep-phhep-th
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具有暗标量凝聚的电弱弦及其(不)稳定性

Electroweak strings with dark scalar condensates and their (in)stability

Péter Forgács, Árpád Lukács

摘要:

在标准模型的最小暗扇区扩展中研究了“可见”电弱型宇宙弦的稳定性,该最小暗扇区由一个U(1)规范场组成,由一个标量自发破缺.“可见”和黑暗的部门耦合通过希格斯门和规范动力学混合项。研究发现,当电弱混合角接近于$θ_{\rm W}=π/2$时,其核心被暗标量凝聚体“填充”的弦表现出比SM中的类似物更好的稳定性。当你让$θ_{\rm W}$接近它的物理值时,它们变得不稳定。不稳定性机制似乎是一个$W$玻色子凝聚机制中发现的电弱弦的稳定性以前的研究。

英文摘要:

The stability of "visible" electroweak-type cosmic strings is investigated in an extension of the Standard Model (SM) by a minimal dark sector, consisting of a U(1) gauge field, broken spontaneously by a scalar. The "visible" and dark sectors are coupled through a Higgs-portal and a gauge-kinetic mixing term. It is found that strings whose core is "filled" with a dark scalar condensate exhibit better stability properties than their analogues in the SM, when the electroweak mixing angle is close to $θ_{\rm W}=π/2$. They become unstable as one lets $θ_{\rm W}$ approach its physical value. The instability mechanism appears to be a $W$-boson condensation mechanism found in previous studies on the stability of electroweak strings.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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