arXiv 1104.40612011-04-20hep-th

Calabi-Yau弦模型中的整体对称性隔离

Sequestering by global symmetries in Calabi-Yau string models

Christopher Andrey, Claudio A. Scrucca

备注：: 47 pages, no figures
发表信息：: Nucl.Phys.B851:245-288,2011
DOI：: 10.1016/j.nuclphysb.2011.05.020

摘要：

我们研究的可能性，实现一个有效的隔离之间的可见和隐藏的部门在通用的杂种优势字符串模型，推广以前的工作orbifold建设顺利卡-丘紧化。在这些理论中，真正的螯合被破坏的相互作用混合手性多重有效Kahler潜力的两个部门。然而，这些有效的相互作用具有特定的电流-电流结构，并且可以从M理论的观点解释为来自重矢量多重态的交换。然后，人们可以尝试通过假设隐藏扇区的动力学中的适当的全局对称性来抑制可见扇区中的通用软标量质量的出现。然而，这种机制并不容易实现，因为有效接触项的结构和可能的全局对称性是先验模型相关的。为了评估是否有任何强大的和通用的选项，我们研究了完全依赖的卡勒潜力的模量和物质领域。这在轨道模型中是众所周知的，在那里它总是导致一个对称的标量流形，但在卡-丘模型中却很少被理解，在那里它通常导致一个非对称的标量流形。然后，我们研究了一个有效的隔离的可能性，全球对称性，并认为，而orbifold模型，这可以在工作中，而自然，卡-丘模型，它只能在相当特殊的情况下实施。

英文摘要：

We study the possibility of realizing an effective sequestering between visible and hidden sectors in generic heterotic string models, generalizing previous work on orbifold constructions to smooth Calabi-Yau compactifications. In these theories, genuine sequestering is spoiled by interactions mixing chiral multiplets of the two sectors in the effective Kahler potential. These effective interactions however have a specific current-current-like structure and can be interpreted from an M-theory viewpoint as coming from the exchange of heavy vector multiplets. One may then attempt to inhibit the emergence of generic soft scalar masses in the visible sector by postulating a suitable global symmetry in the dynamics of the hidden sector. This mechanism is however not straightforward to implement, because the structure of the effective contact terms and the possible global symmetries is a priori model dependent. To assess whether there is any robust and generic option, we study the full dependence of the Kahler potential on the moduli and the matter fields. This is well known for orbifold models, where it always leads to a symmetric scalar manifold, but much less understood for Calabi-Yau models, where it generically leads to a non-symmetric scalar manifold. We then examine the possibility of an effective sequestering by global symmetries, and argue that whereas for orbifold models this can be put at work rather naturally, for Calabi-Yau models it can only be implemented in rather peculiar circumstances.

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