Large volume susy breaking with a solution to the decompactification problem
Large volume susy breaking with a solution to the decompactification problem
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大体积苏西破碎，解决松散问题
DOI：
10.1016/j.nuclphysb.2015.08.001
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
H. Partouche
中科院分区：
文献类型：
--
作者：
A. Faraggi;C. Kounnas;H. Partouche
我们通过将两个大额外维的动量和缠绕电荷耦合到超对称发生器的r电荷上来研究超对称破缺的异质基态。大的尺寸产生了重阀值的柱塔，这有助于仪表接箍的运行。在一般情况下，这些贡献与两个大维度的体积成正比，并使微扰弦膨胀失效。如果在模空间的边界上恢复了N= 4的超对称，则弱破缺扇区作为N= 4→N= 2→N= 0超对称的自发破缺相出现，则可以避免这个问题。我们讨论了z2xz2轨道的机制，它要求包含大额外维的扭曲扇区没有不动点。我们分析了全弦的配分函数，证明了扭曲扇区自身分布在非对齐的N= 2轨道上，从而保留了弦解的解。值得注意的是，我们发现N= 2→N= 0扇区对真空能量的贡献被抑制了，唯一的实质性贡献来自于N= 4扇区断裂到N= 0。
We study heterotic ground states in which supersymmetry is broken by coupling the momentum and winding charges of two large extra dimensions to the R-charges of the supersymmetry generators. The large dimensions give rise to towers of heavy string thresholds that contribute to the running of the gauge couplings. In the general case, these contributions are proportional to the volume of the two large dimensions and invalidate the perturbative string expansion. The problem is evaded if the susy breaking sectors arise as a spontaneously broken phase of N= 4→ N= 2→ N= 0 supersymmetry, provided that N= 4 supersymmetry is restored on the boundary of the moduli space. We discuss the mechanism in the case of Z 2× Z 2 orbifolds, which requires that the twisted sector that contains the large extra dimensions has no fixed points. We analyze the full string partition function and show that the twisted sectors distribute themselves in non-aligned N= 2 orbits, hence preserving the solution to the string decompactification problem. Remarkably, we find that the contribution to the vacuum energy from the N= 2→ N= 0 sectors is suppressed, and the only substantial contribution arises from the breaking of the N= 4 sector to N= 0.
疏散准现实异种异质弦真空
影响因子：
4.4
作者：
Assel B
通讯作者：
Assel B