arXiv 0804.17572008-04hep-th

具有大块快子物质的稳定双膜模型

Stable two--brane models with bulk tachyon matter

A. Das, Sayan Kar, Soumitra SenGupta

备注：: Final version published in Int. Jr. Mod. Phys A
发表信息：: Int. Jr. Mod. Phys. A 24, 4457 (2009)
DOI：: 10.1142/S0217751X0904453X

摘要：

我们探讨了构建稳定的，扭曲的双膜模型，解决了层次问题的可能性，与散装非正则标量场（快子物质）作为源项的行动。在我们的例子中有两个模型--一个模型的翘曲因子（表示为$e^{-2f(σ)}$）与标准的Randall-Sundrum不同，在$f(σ)$中增加了一个二次项，另一个模型的翘曲是超指数的。我们调查的决议层次的问题，并进行稳定性分析，获得有效的膜间电位，在每种情况下。我们的分析表明，在这两个模型中确实存在与层次分辨率一致的稳定的模值。因此，这些模型，其中散装标量场产生的几何形状，并确保稳定性，提供了可行的替代标准的兰德尔-Sundrum双膜的情况。

英文摘要：

We explore the possibility of constructing stable, warped two--brane models which solve the hierarchy problem, with a bulk non--canonical scalar field (tachyon matter) as the source term in the action. Among our examples are two models--one with a warp factor (denoted as $e^{-2f(σ)}$) which differs from that of the standard Randall--Sundrum by the addition of a quadratic piece in the $f(σ)$ and another, where the warping is super-exponential. We investigate the issue of resolution of hierarchy and perform a stability analysis by obtaining the effective inter-brane potentials, in each case. Our analysis reveals that there does exist stable values of the modulus consistent with hierarchy resolution in both the models. Thus, these models, in which the bulk scalar field generates the geometry and also ensures stability, provide viable alternatives to the standard Randall--Sundrum two-brane scenario.

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