arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1207.2665hep-th
收藏

具有少量中性模量的杂种优势T-折叠

Heterotic T-folds with a small number of neutral moduli

Massimo Bianchi, Gianfranco Pradisi, Cristina Timirgaziu, Luca Tripodi

摘要:

在自由费米子结构的框架下,讨论了D=4的非几何超对称杂化弦模型。我们进行了系统的扫描模型与四个先验的左右不对称的Z_2投影和移位。我们分析了一些2^{20}模型,确定了18个不等价类,并解决了离散扭转产生的变体。他们不包含几何或平凡的中性模量,除了的duplex。然而,我们表明存在的平坦方向的形式,正好边际变形和识别图案的对称性破缺的产品规范组,实现在一级,打破了他们的对角线在更高的水平。我们还描述了一个“逆Gepner映射”从杂种优势到II型模型,可以使用,在某些非几何设置,定义“有效的”拓扑不变。

英文摘要:

We discuss non-geometric supersymmetric heterotic string models in D=4, in the framework of the free fermionic construction. We perform a systematic scan of models with four a priori left-right asymmetric Z_2 projections and shifts. We analyze some 2^{20} models, identifying 18 inequivalent classes and addressing variants generated by discrete torsions. They do not contain geometrical or trivial neutral moduli, apart from the dilaton. However, we show the existence of flat directions in the form of exactly marginal deformations and identify patterns of symmetry breaking where product gauge groups, realized at level one, are broken to their diagonal at higher level. We also describe an "inverse Gepner map" from Heterotic to Type II models that could be used, in certain non geometric settings, to define "effective" topological invariants.

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。

↑