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arXiv 1204.0396hep-thgr-qchep-ph
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通过磁场相互作用的宇宙弦时空中的测地运动

Geodesic motion in the space-time of cosmic strings interacting via magnetic fields

Betti Hartmann, Valeria Kagramanova

摘要:

本文研究了两个阿贝尔-希格斯弦通过磁场相互作用时的测地线运动。这些宇宙弦的束缚态构成了p-q-弦的场论实现,而p-q-弦的场论实现是由根植于弦论的暴胀模型所预言的,例如膜暴胀。与以前研究的p-q弦模型相比,我们的模型具有Bogomolnyi-Prasad-Sommerfield(BPS)极限。如果宇宙弦存在,那么通过直接观察来探测它们将是令人兴奋的。我们建议,这可以通过观察这些物体的时空中的测试粒子运动来实现。为了能够作出预测,我们必须解决场方程描述的配置以及测地线方程数值。测地线可以根据测试粒子的能量、角动量和弦轴上的动量来分类。我们发现,两个阿贝尔-希格斯弦的相互作用可以导致存在的束缚轨道,将缺席没有相互作用。我们还讨论了轨道的最小和最大半径,并在引力波发射的背景下可能的应用评论。

英文摘要:

We study the geodesic motion of test particles in the space-time of two Abelian-Higgs strings interacting via their magnetic fields. These bound states of cosmic strings constitute a field theoretical realization of p-q-strings which are predicted by inflationary models rooted in String Theory, e.g. brane inflation. In contrast to previously studied models describing p-q-strings our model possesses a Bogomolnyi-Prasad-Sommerfield (BPS) limit. If cosmic strings exist it would be exciting to detect them by direct observation. We propose that this can be done by the observation of test particle motion in the space-time of these objects. In order to be able to make predictions we have to solve the field equations describing the configuration as well as the geodesic equation numerically. The geodesics can then be classified according to the test particle's energy, angular momentum and momentum along the string axis. We find that the interaction of two Abelian-Higgs strings can lead to the existence of bound orbits that would be absent without the interaction. We also discuss the minimal and maximal radius of orbits and comment on possible applications in the context of gravitational wave emission.

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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