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arXiv 2007.12675hep-th
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一个拓扑框架中的Bumblebee场

Bumblebee field in a Topological Framework

L. P. Colatto, A. L. A. Penna, W. C. Santos

摘要:

在$(1+2)D$ Minkowski时空中,在拓扑框架下分析了一个由自发Lorentz破坏机制产生的矢量场,即大黄蜂模型.以包含拓扑类Chern-Simons型项的$(1+2)D$非线性Bumblebee矢量物质场动力学为例,利用Nielsen-Olesen方法导出了描述非平凡真空的Lorentz破缺矢量参数,该参数通过自发对称性破缺机制表征了非平凡真空.我们验证了该模型的稳定性和磁涡旋的稳定性,并注意到产生的具有偏振方向的孤子模可以与真空能量的局域各向异性相关联。给出了涡的运动方程及其渐近行为。我们得到了类时Bumblebee矢量场真空所表示的Lorentz对称性破缺效应可以表现为无限宇宙中一个固定点$r_0$上的一种脉冲,如果Bumblebee矢量场真空具有类空特性,则可以表现为宇宙边界$r_0$上的一个势垒.我们还分析了通过传播的频谱,我们注意到,拓扑质量以及动力学质量极的贡献。我们得到,Chern-Simons型项,实际上,表明“速度”的领域饱和的渐近极限和涡核不能为零维。

英文摘要:

A vector field coming from spontaneous Lorentz violation mechanism, namely Bumblebee model is analysed in a topological framework in a $(1+2)D$ Minkowski space-time. Taking a $(1+2)D$ nonlinear Bumblebee vector matter field dynamics where we include topological like Chern-Simons type terms, a vector version of a soliton state, or vortex was found. The Nielsen-Olesen procedure was used in order to derive a Lorentz-violation vector parameter which characterizes, via Spontaneous Symmetry Breaking mechanism, the non-trivial vacuum. We verify the stability of the model as much as the magnetic vortex, and noticed that the soliton modes with polarized direction generated can be associated with local anisotropy of vacuum energy. The vortex equations of motion and the asymptotic behaviour is presented. We have obtained that the effect of the Lorentz symmetry violation expressed by the a time-like Bumblebee vector field vacuum could be shown as kind of pulse at a fixed point $r_0$ in a limitless universe, or as a barrier at $r_0$ which can represent a boundary in the universe, if the Bumblebee vector field vacuum has space-like characteristic. We also analyse the spectrum via propagators where we note that the topological mass contributes as well to the dynamical mass poles. We obtain that the Chern-Simons type terms, in fact, indicates the "speed" of the field to saturate the asymptotic limit and that the vortex core can not be dimension zero.

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