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arXiv 0801.0478hep-phhep-th
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$G_2$ - MSSM --粒子物理学的$M$理论模型

The $G_2$-MSSM - An $M$ Theory motivated model of Particle Physics

Bobby S. Acharya, Konstantin Bobkov, Gordon L. Kane, Piyush Kumar, Jing Shao

摘要:

我们继续我们的研究$M$理论真空$G_2$流形上的低能量的影响,在\cite{Acharya:2007rc,Acharya:2006ia}进行,在那里它被证明,模量可以稳定和TeV规模产生,普朗克规模作为唯一的维数输入。一个动机良好的现象学模型-$G_2$ -MSSM,可以自然地定义在上述框架内。在本文中,我们研究了$G_2$ -MSSM的一些重要的唯象特征。特别地,计算了软超对称破缺参数和超伙伴谱。当我们调节宇宙学常数时,$G_2$ -MSSM一般会产生具有Wino LSP的轻Gauginos和重标量。电弱对称性破缺是存在的,但微调。$G_2$ -MSSM也自然地与精密规范耦合统一一致。$G_2$ -MSSM的宇宙学和对撞机物理学的唯象后果将很快被更详细地报道。

英文摘要:

We continue our study of the low energy implications of $M$ theory vacua on $G_2$ manifolds, undertaken in \cite{Acharya:2007rc,Acharya:2006ia}, where it was shown that the moduli can be stabilized and a TeV scale generated, with the Planck scale as the only dimensionful input. A well-motivated phenomenological model - the $G_2$-MSSM, can be naturally defined within the above framework. In this paper, we study some of the important phenomenological features of the $G_2$-MSSM. In particular, the soft supersymmetry breaking parameters and the superpartner spectrum are computed. The $G_2$-MSSM generically gives rise to light gauginos and heavy scalars with wino LSPs when one tunes the cosmological constant. Electroweak symmetry breaking is present but fine-tuned. The $G_2$-MSSM is also naturally consistent with precision gauge coupling unification. The phenomenological consequences for cosmology and collider physics of the $G_2$-MSSM will be reported in more detail soon.

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