arXiv 0810.56602008-10hep-thhep-ph

从奇点处的膜到现实弦线

Towards Realistic String Vacua From Branes At Singularities

Joseph P. Conlon, Anshuman Maharana, Fernando Quevedo

备注：: 40 pages, 10 figures
发表信息：: JHEP 0905:109,2009
DOI：: 10.1088/1126-6708/2009/05/109

摘要：

我们报告的进展，建设字符串模型结合现实的D-膜物质的内容和模量稳定与动态低尺度超对称性破缺。一般的框架是，当地的D-膜模型嵌入到大体积的方法，模量稳定。本文综述了关于del Pezzo $n$（$dP_n$）奇性（包括D3和D 7膜）的基本理论。我们提供了三个夸克/轻子家庭和标准，左右对称，Pati-Salam和Trinification模型的规范对称性的超对称的例子，没有不必要的手征异国情调。我们描述了如何奇异性结构导致家庭的对称性管理汤川耦合，这可能会给质量层次之间的不同世代。我们概述了如何将这些模型嵌入到紧凑的卡-丘紧化与大体积模量稳定，并说明这是可能的最小条件。研究了软超对称破缺的一般结构。在奇点处，所有对软项（引力调解和反常调解）的主导阶贡献都消失了。我们列举子领导的贡献，并估计其规模。我们还描述了模型独立的物理影响，这种情况下。这些包括反常和非反常U（1）的质量，以及一种新的超弱力的普遍存在，在这种力下轻子和/或夸克可以带电。我们认为，这种规范玻色子可能是最近在Tevatron的CDF探测器上发现的幽灵μ子异常的原因。

英文摘要：

We report on progress towards constructing string models incorporating both realistic D-brane matter content and moduli stabilisation with dynamical low-scale supersymmetry breaking. The general framework is that of local D-brane models embedded into the LARGE volume approach to moduli stabilisation. We review quiver theories on del Pezzo $n$ ($dP_n$) singularities including both D3 and D7 branes. We provide supersymmetric examples with three quark/lepton families and the gauge symmetries of the Standard, Left-Right Symmetric, Pati-Salam and Trinification models, without unwanted chiral exotics. We describe how the singularity structure leads to family symmetries governing the Yukawa couplings which may give mass hierarchies among the different generations. We outline how these models can be embedded into compact Calabi-Yau compactifications with LARGE volume moduli stabilisation, and state the minimal conditions for this to be possible. We study the general structure of soft supersymmetry breaking. At the singularity all leading order contributions to the soft terms (both gravity- and anomaly-mediation) vanish. We enumerate subleading contributions and estimate their magnitude. We also describe model-independent physical implications of this scenario. These include the masses of anomalous and non-anomalous U(1)'s and the generic existence of a new hyperweak force under which leptons and/or quarks could be charged. We propose that such a gauge boson could be responsible for the ghost muon anomaly recently found at the Tevatron's CDF detector.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

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