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arXiv 0810.1096hep-thgr-qchep-ph
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Casimir能量与膜稳定性

Casimir Energy and Brane Stability

Richard Obousy, Gerald Cleaver

摘要:

我们研究了Casimir能量作为膜稳定性机制在五维模型中的作用,五维在S^1 \Z_2轨道上紧致化,其中包括Randall-Sundrum双膜模型(RS 1)。我们采用zeta函数正则化技术,利用Schwinger适当的时间方法和Jacobi theta函数恒等式来计算单圈有效势。我们表明,结合的Casimir能量的标量希格斯场,三代的标准模型费米子和一个额外的大质量非SM标量在散装产生一个非平凡的最小的潜力。特别地,我们考虑了一个标量场与一个洛伦兹破坏矢量粒子的耦合,该粒子局域在紧化维。这样一个标量可以提供一种自然的微调手段,这种微调是稳定膜分离所需要的。最后,我们简要地回顾了卡西米尔能量在产生目前观察到的宇宙膨胀时代的可能性,通过检查一个简单的五维各向异性度量。

英文摘要:

We investigate the role of Casimir energy as a mechanism for brane stability in five-dimensional models with the fifth dimension compactified on an S^1\Z_2 orbifold, which includes the Randall-Sundrum two brane model (RS1). We employ a zeta-function regularization technique utilizing the Schwinger proper time method and the Jacobi theta function identity to calculate the one-loop effective potential. We show that the combination of the Casimir energies of a scalar Higgs field, the three generations of Standard Model fermions and one additional massive non-SM scalar in the bulk produce a non-trivial minimum of the potential. In particular, we consider a scalar field with a coupling in the bulk to a Lorentz violating vector particle localized to the compactified dimension. Such a scalar may provide a natural means of the fine-tuning needed for stabilization of the brane spearation. Lastly, we briefly review the possibility that Casimir energy plays a role in generating the currently observed epoch of cosmological inflation by examining a simple five-dimensional anisotropic metric.

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