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arXiv 2107.04738hep-th
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Weinberg-Salam模型中单极子与半单极子的有界系统

Bounded System of Monopole and Half-monopole in the Weinberg-Salam Model

Dan Zhu, Khai-Ming Wong, Timothy Tie

AI总结:

本研究针对Weinberg-Salam模型中φ环绕数n=1的单极子与半单极子构型,分析其束缚态形成、磁偶极矩、规范势奇异性及能量特性,对比SU(2) Yang-Mills-Higgs理论揭示出二者行为差异。

摘要:

在本工作中,我们研究了Weinberg-Salam模型中φ环绕数n=1的1+半单极子构型。我们观察到,与SU(2) Yang-Mills-Higgs理论中的相同构型相比,单极子与半单极子之间的有限间距变得更大时,会形成一条通量管,从而在Weinberg-Salam模型中构成单极子与半单极子的束缚态。该单极子-半单极子对周围不存在循环的电磁电流环,但系统具有非零的磁偶极矩。非阿贝尔规范势和电磁规范势沿负z轴是奇异的,但总能量是有限的。我们通过固定Weinberg角并改变Higgs自耦合常数,以及反之的方式研究了这些解。结果表明,Weinberg-Salam模型中的该构型与其在SU(2) Yang-Mills-Higgs理论中的对应构型表现出不同的行为。

英文摘要:

In this work, we study the one plus half-monopole configuration in Weinberg-Salam model, covering $ϕ$-winding number $n$ = 1. We observed that while the finite separation between the one-monopole and the half-monopole becomes larger as compared to the same configuration in SU(2) Yang-Mills-Higgs theory, a flux tube is established, creating a bound-state of one-monopole and half-monopole in Weinberg-Salam model. There is no electromagnetic current loop circulating the pair of one-monopole and half-monopole, but the system possesses non-vanishing magnetic dipole moment. The non-Abelian gauge potential and the electromagnetic gauge potential are singular along the negative $z$-axis, but the total energy is finite. The solutions are investigated by fixing the Weinberg angle while varying the Higgs self-coupling constant and vice versa. It is shown that this configuration in Weinberg-Salam model possesses different behaviours than its counterpart in SU(2) Yang-Mills-Higgs theory.

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