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arXiv 0711.0396hep-phastro-phhep-th
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真实的Yukawa织构和相交膜的SUSY谱

Realistic Yukawa Textures and SUSY Spectra from Intersecting Branes

Ching-Ming Chen, Tianjun Li, V. E. Mayes, D. V. Nanopoulos

摘要:

本文研究了在T^6/(Z2 x Z2)方向折叠上由IIA型弦论中相交的D 6-膜构造的三族Pati-Salam模型的可能唯象,并给出了一些理想的半现实特征.该模型在弦尺度下自动实现了三能级规范耦合统一,并且在弦尺度附近规范对称性可以破缺为标准模型(SM)。模型中少量的额外手征奇异态可以通过Higgs机制和强动力学解耦。我们计算了可能的超对称破缺软项和相应的低能超对称粒子谱,这些谱可能在大型强子对撞机(LHC)上得到验证。我们发现,在参数空间的可行区域,最轻的CP偶希格斯玻色子质量通常满足m_H < 120 GeV,观测到的暗物质密度可能是由此产生的.最后,我们发现在统一标度下得到正确的SM夸克质量和混合以及τ轻子质量是可能的。此外,中微子质量和混合可以通过跷跷板机制产生。机制,以稳定的开放和封闭的字符串模量,这是必要的模型是真正可行的,并作出明确的预测进行了讨论。

英文摘要:

We study the possible phenomenology of a three-family Pati-Salam model constructed from intersecting D6-branes in Type IIA string theory on the T^6/(Z2 x Z2) orientifold with some desirable semi-realistic features. In the model, tree-level gauge coupling unification is achieved automatically at the string scale, and the gauge symmetry may be broken to the Standard Model (SM) close to the string scale. The small number of extra chiral exotic states in the model may be decoupled via the Higgs mechanism and strong dynamics. We calculate the possible supersymmetry breaking soft terms and the corresponding low-energy supersymmetric particle spectra which may potentially be tested at the Large Hadron Collider (LHC). We find that for the viable regions of the parameter space the lightest CP-even Higgs boson mass usually satisfies m_H < 120 GeV, and the observed dark matter density may be generated. Finally, we find that it is possible to obtain correct SM quark masses and mixings, and the tau lepton mass at the unification scale. Additionally, neutrino masses and mixings may be generated via the seesaw mechanism. Mechanisms to stabilize the open and closed-string moduli, which are necessary for the model to be truly viable and to make definite predictions are discussed.

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。

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