arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1002.2427hep-th
收藏

具有大质量玻色子-费米子简并对称性的玻色子α的边缘形变

Marginal Deformations of Vacua with Massive boson-fermion Degeneracy Symmetry

Ioannis Florakis, Costas Kounnas, Nicolaos Toumbas

摘要:

在II型超弦理论和杂化超弦理论中构造了具有质量谱玻色子-费米子简并对称性(MSDS)的二维弦真空。对它们的模空间的研究表明,存在着大的边缘形变,它连续地将初始d=2的MSDS真空连接到高维的常规超弦真空,在那里时空超对称性被几何通量自发破缺。我们发现,最大对称d=2的第二类MSDS-vacuum对应于最大规范超引力N=8,d=4,其中超引力规范是由通量引起的。这种对应关系被扩展到不太对称的情况下,其中初始的MSDS对称性减少的轨道。我们还展示和分析热解释的一些欧几里得版本的模型和确定类的MSDS真空保持快子自由下任意边缘变形的扩展对称点。二维MSDS真空和由此产生的四维有效超引力理论之间的联系在绝热宇宙学演化的背景下自然产生,其中非常早期的宇宙被证明是由MSDS-vacuum描述的,而在宇宙学晚期,它被描述为具有自发破缺超对称性的有效N=1超引力理论。

英文摘要:

Two-dimensional string vacua with Massive Spectrum boson-fermion Degeneracy Symmetry (MSDS) are explicitly constructed in Type II and Heterotic superstring theories. The study of their moduli space indicates the existence of large marginal deformations that connect continuously the initial d=2, MSDS vacua to higher-dimensional conventional superstring vacua, where spacetime supersymmetry is spontaneously broken by geometrical fluxes. We find that the maximally symmetric, d=2, Type II MSDS-vacuum, is in correspondence with the maximal, N=8, d=4, gauged supergravity, where the supergravity gauging is induced by the fluxes. This correspondence is extended to less symmetric cases where the initial MSDS symmetry is reduced by orbifolds. We also exhibit and analyse thermal interpretations of some Euclidean versions of the models and identify classes of MSDS vacua that remain tachyon-free under arbitrary marginal deformations about the extended symmetry point. The connection between the two-dimensional MSDS vacua and the resulting four-dimensional effective supergravity theories arises naturally within the context of an adiabatic cosmological evolution, where the very early Universe is conjectured to be described by an MSDS-vacuum, while at late cosmological times it is described by an effective N=1 supergravity theory with spontaneously broken supersymmetry.

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。

↑