Effective Lagrangian and stability analysis in warped space

Effective Lagrangian and stability analysis in warped space
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扭曲空间中的有效拉格朗日和稳定性分析

DOI:
10.1007/jhep09(2022)195
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发表时间:
2022
影响因子:
5.4
通讯作者:
H. Cai
H. Cai
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
H. Cai

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在翘曲空间模型中,膜间距可以用Goldberger-Wise机制来稳定。尤其重要的是,稳定势要求正确识别动力学自由度。本文给出了兰德尔-桑德鲁姆模型及其N-膜(N-≥4)扩展的二次型有效拉格朗日量的完整计算。通过将变分原理应用于特定的微扰场,我们导出了引力子解耦的运动方程和正交化条件。证明了这种方法与用线性化爱因斯坦方程进行分析是等价的。我们的推导表明,在N膜系统中,只有一个自由度的辐射场是动力学的,其他模被规范修正所消除。因此,我们可以以类似于RS1场景的方式将GW稳定化直接推广到N-膜模型。
In the warped space model, the inter-brane distance can be stabilized by the Goldberger-Wise mechanism. Of particular importance, the stabilization potential calls for a proper identification of the dynamical degree of freedom. In this paper, we provided a complete calculation of the effective Lagrangian till the quadratic order that is generic for the Randall-Sundrum model and its N-brane (N≥ 4) extensions. By applying the variation principle to a specific perturbation field, we derived the equations of motion and orthogonal conditions for decoupling the graviton. This approach is demonstrated to be equivalent to the analysis using the linearized Einstein equation. Our derivation clarifies that in the N-brane set up, just one degree of freedom for the radion field is dynamical, with the other modes eliminated by the gauge fixings. Thus we can directly generalize the GW stabilization to the N-brane model in a way similar to the RS1 scenario.
位于膜中的黑洞的 Randall-Sundrum 2 准本征振动
DOI: --
发表时间: 2008
期刊:
影响因子: --
作者:
野澤真人;小林努
通讯作者: 小林努