Light dilaton in a metastable vacuum
Light dilaton in a metastable vacuum
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DOI：
10.1103/physrevd.103.046009
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发表时间：
2020-11
影响因子：
5
通讯作者：
Daniel Elander;M. Piai;John Roughley
中科院分区：
文献类型：
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作者：
Daniel Elander;M. Piai;John Roughley
我们通过研究亚稳态真空沿常规超重力背景分支的扰动来确定参数光膨胀，该分支是对偶的四维限制场论。该分支还包括稳定和不稳定的解决方案。作为一种特例，前者包含了Witten提出的全息禁闭模型。后者通过增强对偶场论中的一个凝聚来接近超对称解。一个相变将稳定背景空间与亚稳背景空间分开。在相变附近，一个最轻的标量态继承了一些膨胀的性质，尽管它不是特别轻。
We identify a parametrically light dilaton by studying the perturbations of metastable vacua along a branch of regular supergravity backgrounds that are dual to four-dimensional confining field theories. The branch includes also stable and unstable solutions. The former encompass, as a special case, the geometry proposed by Witten as a holographic model of confinement. The latter approach a supersymmetric solution, by enhancing a condensate in the dual field theory. A phase transition separates the space of stable backgrounds from the metastable ones. In proximity of the phase transition, one of the lightest scalar states inherits some of the properties of the dilaton, despite not being particularly light.