标题： 带有（少量）弦的暗维度 显示英文标题

标题： Dark dimension with (little) strings attached

摘要： 我们提出了暗能量与弱耦合弦理论中新物理尺度之间的关系。红外物理与紫外物理之间的这种混合导致了一个独特的现实现象学角落：除非进行微调，我们自然会得出“暗维度”情景，即一个介于宏观和微观之间的额外维度，尺寸为微米级，标准模型局域在D膜上。我们明确的自上而下世界面推导为其提供了更坚实的依据。允许一些微调，使得真空能量仅在弦微扰理论的高阶出现，“小弦理论”情景，即一个非常弱耦合的弦，是一种替代可能性。在这种情况下，弦尺度位于粒子加速器可探测范围的边缘。 显示英文摘要

摘要： We motivate a relation between dark energy and the scale of new physics in weakly coupled string theory. This mixing between infrared and ultraviolet physics leads to a unique corner for real-world phenomenology: barring fine-tunings, we are naturally led to the ``dark dimension'' scenario, a single mesoscopic extra dimension of micron size with the standard model localized on D-branes. Our explicit top-down worldsheet derivation establishes it on a more solid grounding. Allowing some fine-tuning, such that the vacuum energy only arise at higher orders in string perturbation theory, the ``little string theory'' scenario with a very weakly coupled string is an alternative possibility. In this case, the string scale lies at the edge of detectability of particle accelerators.