Brane localized curvature for warped gravitons
Brane localized curvature for warped gravitons
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扭曲引力子的膜局部曲率
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
T. Rizzo
中科院分区：
文献类型：
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作者：
H. Davoudiasl;H. Davoudiasl;J. Hewett;J. Hewett;T. Rizzo;T. Rizzo
研究了在层次结构的Randall-Sundrum （RS）模型中加入膜局域曲率项的影响。这导致了引力子存在膜局域动力学项。这些项可以由膜和体量子效应以及膜上的希格斯-曲率混合引起。在这些项存在的情况下，我们推导了Kaluza-Klein （KK）引力子的修正谱及其与四维场的耦合。我们发现KK引力子的质量和耦合对膜局域项的大小有相当大的依赖性；因此修正了模型的弱尺度现象学。特别是，RS模型中普遍出现的弱尺度自旋-2重子共振可能比先前假设的要轻得多。然而，它们可能会避免检测，因为它们的宽度可能太窄而无法在对撞机上观察到。在接触相互作用极限下，对于一定范围的参数，实验达到的尺度与理论边界项的大小无关。
We study the effects of including brane localized curvature terms in the Randall-Sundrum (RS) model of the hierarchy. This leads to the existence of brane localized kinetic terms for the graviton. Such terms can be induced by brane and bulk quantum effects as well as Higgs-curvature mixing on the brane. We derive the modified spectrum of Kaluza-Klein (KK) gravitons and their couplings to 4-dimensional fields in the presence of these terms. We find that the masses and couplings of the KK gravitons have considerable dependence on the size of the brane localized terms; the weak-scale phenomenology of the model is consequently modified. In particular, the weak-scale spin-2 graviton resonances which generically appear in the RS model may be significantly lighter than previously assumed. However, they may avoid detection as their widths may be too narrow to be observable at colliders. In the contact interaction limit, for a certain range of parameters, the experimental reach for the scale of the theory is independent of the size of the boundary terms.