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Grand unification models from SO(32) heterotic string
International Journal of Modern Physics A ( IF 1.6 ) Pub Date : 2020-11-23 , DOI: 10.1142/s0217751x20501985
Jihn E. Kim 1, 2
Affiliation  

Grand unification groups (GUTs) are constructed from SO(32) heterotic string via [Formula: see text] orbifold compactification. So far, most phenomenological studies from string compactification relied on [Formula: see text] heterotic string, and this invites the SO(32) heterotic string very useful for future phenomenological studies. Here, spontaneous symmetry breaking is achieved by Higgsing of the antisymmetric tensor representations of SU[Formula: see text]. The anti-SU[Formula: see text] presented in this paper is a completely different class from the flipped-SU[Formula: see text]’s from the spinor representations of SO[Formula: see text]. Here, we realize chiral representations: [Formula: see text] for a SU(9) GUT and [Formula: see text] for a SU(5)[Formula: see text] GUT. In particular, we confirm that the non-Abelian anomalies of SU(9) gauge group vanish and hence our compactification scheme achieves the key requirement. We also present the Yukawa couplings, in particular for the heaviest fermion, [Formula: see text], and lightest fermions, neutrinos. In the supersymmetric version, we present a scenario how supersymmetry can be broken dynamically via the confining gauge group SU(9). Three families in the visible sector are interpreted as the chiral spectra of SU[Formula: see text] GUT.

中文翻译:

来自 SO(32) 杂种弦的大统一模型

大统一群 (GUT) 由 SO(32) 杂项串通过 [公式:见文本] orbifold 紧化构造而成。到目前为止,弦紧致化的现象学研究大多依赖于[公式:见正文]杂音弦,这使得SO(32)杂音弦对未来的现象学研究非常有用。在这里,自发的对称性破缺是通过 SU [公式:见正文] 的反对称张量表示的希格斯函数实现的。本文提出的反SU[公式:见文本]与SO[公式:见文本]的旋量表示的翻转SU[公式:见文本]完全不同。在这里,我们实现了手性表示:SU(9) GUT 的 [Formula: see text] 和 SU(5) [Formula: see text] GUT 的 [Formula: see text]。特别是,我们确认 SU(9) 规范群的非阿贝尔异常消失,因此我们的紧化方案达到了关键要求。我们还介绍了 Yukawa 耦合,特别是最重的费米子 [公式:见正文] 和最轻的费米子中微子。在超对称版本中,我们提出了如何通过限制规范组 SU(9) 动态打破超对称性的场景。可见区域中的三个族被解释为 SU[公式:见文本] GUT 的手性光谱。
更新日期:2020-11-23
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