轻度隔离超引力模型及其在弦论中的实现
Mildly sequestered supergravity models and their realization in string theory
摘要：
我们详细说明的想法，五维模型的隔离被破坏，由于接触相互作用引起的矢量多重态可能仍然是温和的隔离，如果一个全球版本的规范对称性与后者生存在隐藏的部门。有趣的是，有人认为，虽然在这种情况下，非平凡的电流-电流接触相互作用是由重矢量模式引起的，但由于全局对称性，这些模式不会引起软标量质量。我们进行了详细的研究，这种混合机制可以实现在超重力和字符串模型，重点是杂交M理论orbifolds的原型情况。我们强调，在一般情况下，该机制的工作原理，只有到subleading的影响抑制的比例之间的全球对称性破缺规模在隐藏的部门和矢量质量尺度或普朗克尺度。我们还认为，这种温和的隔离机制允许恢复的超对称性破缺，这是不相容的超对称稳定在其原始版本的超对称性主导的情况下，通过利用隐藏膜场的事实，即有助于宇宙学常数，但不是软条款，由于全球对称性。
英文摘要：
We elaborate on the idea that five-dimensional models where sequestering is spoiled due to contact interactions induced by vector multiplets may still be mildly sequestered if a global version of the gauge symmetry associated to the latter survives in the hidden sector. Interestingly, it has been argued that although in such a situation non-trivial current-current contact interactions are induced by the heavy vector modes, these do not induce soft scalar masses, as a consequence of the global symmetry. We perform a detailed study of how this hybrid mechanism can be implemented in supergravity and string models, focusing on the prototypical case of heterotic M-theory orbifolds. We emphasize that in general the mechanism works only up to subleading effects suppressed by the ratio between the global symmetry breaking scale in the hidden sector and the vector mass scale or the Planck scale. We also argue that this mild sequestering mechanism allows to rehabilitate the scenario of dilaton domination of supersymmetry breaking, which is incompatible with dilaton stabilization in its original version, by exploiting the fact that hidden brane fields do contribute to the cosmological constant but not to soft terms, thanks to the global symmetry.
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