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arXiv 2103.02705hep-phgr-qchep-th
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Radion动力学、重Kaluza-Klein共振和引力波

Radion dynamics, heavy Kaluza-Klein resonances and gravitational waves

Eugenio Megias, Germano Nardini, Mariano Quiros

备注：
16 pages, 7 figures; v2 extended version: added references and Figs. 2, 3, 5 and 7 (lower panels), Figs. 6 and 7 (upper panels) updated, extended discussion in Secs. 3.3, 4, 5 and 6. Talk given by E.Megias at the 9th International Conference on New Frontiers in Physics (ICNFP 2020), 4 Sep - 2 Oct 2020, Kolymbari, Crete, Greece
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摘要：

本文研究了具有多项式体势的弯曲模型中辐射场的禁闭/解除禁闭相变。度规上的反反应的Radion考虑通过使用超势的形式主义，而Radion有效势是从一个新的配方，可以将反反应。相变导致随机引力波背景，这取决于第一卡鲁扎-克莱因共振，$m_{\textrm{KK}}$的能量尺度。这项工作完成了以前的研究在以下几个方面：i）我们详细的评价的radion频谱; ii）我们报告之间的不匹配的厚壁近似和数值反弹的解决方案; iii）我们包括一个抑制因子的频谱中的声波占其有限的寿命;和，iv）我们更新的约束$m_{\textrm{KK}}$的O3 LIGO和处女座的数据。我们发现，即将到来的引力波干涉仪可以探测$m_{\textrm{KK}} \lesssim 10^9$ TeV的情况下，而O3运行边界排除翘曲模型与$10^4 \textrm{TeV} \lesssim m_{\textrm{KK}} \lesssim 10^7$ TeV表现出非常强的约束/解除约束相变。

英文摘要：

We study the confinement/deconfinement phase transition of the radion field in a warped model with a polynomial bulk potential. The backreaction of the radion on the metric is taken into account by using the superpotential formalism, while the radion effective potential is obtained from a novel formulation which can incorporate the backreaction. The phase transition leads to a stochastic gravitational wave background that depends on the energy scale of the first Kaluza-Klein resonance, $m_{\textrm{KK}}$. This work completes previous studies in the following aspects: i) we detail the evaluation of the radion spectrum; ii) we report on the mismatches between the thick wall approximation and the numerical bounce solution; iii) we include a suppression factor in the spectrum of sound waves accounting for their finite lifetime; and, iv) we update the bound on $m_{\textrm{KK}}$ in view of the O3 LIGO and Virgo data. We find that the forthcoming gravitational wave interferometers can probe scenarios where $m_{\textrm{KK}} \lesssim 10^9$ TeV, while the O3-run bounds rule out warped models with $10^4 \textrm{TeV} \lesssim m_{\textrm{KK}} \lesssim 10^7$ TeV exhibiting an extremely strong confinement/deconfinement phase transition.

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