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arXiv 1509.04577gr-qchep-phhep-th
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破缺$Z_2$对称性的厚膜孤子

Thick brane solitons breaking $Z_2$ symmetry

Marzieh Peyravi, Nematollah Riazi, Francisco S. N. Lobo

摘要:

本文研究了4 + 1维厚膜的新孤子解。特别是,膜模型的基础上的正弦戈登(SG),$φ^{4}$和$φ^{6}$标量场进行了研究,在某些情况下,$Z_{2}$对称性被打破。此外,这些孤子解还对厚膜起到了支撑和稳定的作用。在这些模型中,对称性破缺的根源在于修正标量场势可能具有非简并真空,而这些非简并真空决定了膜两侧的宇宙学常数。最后,为了研究粒子在膜邻域内的运动,我们研究了第五维的测地线方程。

英文摘要:

New soliton solutions for thick branes in 4 + 1 dimensions are considered in this article. In particular, brane models based on the sine-Gordon (SG), $φ^{4}$ and $φ^{6}$ scalar fields are investigated; in some cases $Z_{2}$ symmetry is broken. Besides, these soliton solutions are responsible for supporting and stabilizing the thick branes. In these models, the origin of the symmetry breaking resides in the fact that the modified scalar field potential may have non-degenerate vacuua and these non-degenerate vacuua determine the cosmological constant on both sides of the brane. At last, in order to explore the particle motion in the neighborhood of the brane, the geodesic equations along the fifth dimension are studied.

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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