论文标题
部分可观测时空混沌系统的无模型预测
Light stringy states and the $g-2$ of the muon
论文作者
论文摘要
在这项工作中，我们评估了来自d-Brane半现实配置中轻丝状状态的MUON（$（g-2）_μ$）异常磁矩的贡献。仅将伴侣伴侣的标量可以具有足够光的质量，以为$（g-2）_ $提供重大贡献。这种情况可能是在与D-Brane模型相交的情况下出现的，其中这样的光标度对应于两个D-BRANES之间的开放式弦的第一个刺激激发，与两个D-BRANES之间伸展，与非常小的角度相交。在本文中，我们表明，内部歧管的几何参数空间中存在一个区域，在该区域中，这种标量光丝状状态可以解释$（g-2）_μ$中观察到的差异的（部分）。在带有$ M_S \ SIM 10〜 {\ rm TEV} $的低字符串比例框架中，我们表明，具有质量$ $ \ Mathcal {o}（250〜 {\ rm Mev}）$的激动人心的希格斯（Mathcal）$ \ mathcal $ \ mathcal {o}（o}（10^{-10^10}）， $（g-2）_μ$差异。这导致了紧凑型尺寸的下限，其中Branes相交$ \ MATHCAL {O}（10^{ - 8}〜{\ rm Gev}^{ - 1}）$。我们还研究了D-Brane配置中的模式，这些模式在三个和四个堆栈模型中都实现了我们的建议。
In this work, we evaluate the contributions to the anomalous magnetic moment of the muon ($(g-2)_μ$) coming from light stringy states in a D-brane semi-realistic configuration. A scalar which couples only to the muon can have a mass sufficiently light to provide a significant contribution to the $(g-2)_μ$. This scenario can arise in intersecting D-brane models, where such light scalars correspond to the first stringy excitations of an open string stretched between two D-branes intersecting with a very small angle. In this article, we show that there is a region in the space of the geometric parameters of the internal manifold where such scalar light stringy states can explain (part) of the observed discrepancy in the $(g-2)_μ$. In a low string scale framework with $M_s\sim 10~{\rm TeV}$, we show that an excited Higgs with mass $\mathcal{O}(250~{\rm MeV})$, living in an intersection with an angle of order $\mathcal{O}(10^{-10})$, can provide a significant contribution of one-tenth of the $(g-2)_μ$ discrepancy. This leads to a lower bound for the compact dimension where the branes intersect of order $\mathcal{O}(10^{-8}~{\rm GeV}^{-1})$. We also study patterns in D-brane configurations that realize our proposal, both in three and four stacks models.
