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arXiv 1002.2937hep-thhep-ph
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D-膜Pati-Salam真空的唯象分析

Phenomenological analysis of D-brane Pati-Salam vacua

P. Anastasopoulos, G. K. Leontaris, N. D. Vlachos

摘要:

在目前的工作中,我们执行的有效的低能量模型的Pati-Salam(PS)的规范对称性在D膜的上下文中导出的唯象分析。这些模型中的一个主要问题来自于这样一个事实,即右手费米子和PS对称破缺的希格斯场在PS对称下变换相同,导致不自然的物质-希格斯混合效应。我们认为,这个问题可以解决在特定的D-膜设置这些领域出现在不同的交叉点。我们进一步观察到,每当一个大的希格斯质量项产生在一个特定的类的质谱,分裂机制-让人想起的双重三重态分裂-可以保护中性希格斯分量从一个重质量项。我们分析了原则上可在这些模型中使用的每个单独表示的含义,以指定建立一致的PS模型所需的最小光谱,该PS模型调和低能量数据。一个简短的讨论是专门的弦瞬子校正的影响,特别是那些产生失踪汤川耦合和费米子质量纹理的贡献。我们讨论了相交的D-膜光谱与Gepner结构的相关性,并分析了超势,由此产生的质量纹理和低能量的影响,后者的一些例子沿着上面提出的路线。

英文摘要:

In the present work we perform a phenomenological analysis of the effective low energy models with Pati-Salam (PS) gauge symmetry derived in the context of D-branes. A main issue in these models arises from the fact that the right-handed fermions and the PS-symmetry breaking Higgs field transform identically under the PS symmetry, causing unnatural matter-Higgs mixing effects. We argue that this problem could be solved in particular D-brane setups where these fields arise in different intersections. We further observe that whenever a large Higgs mass term is generated in a particular class of mass spectra, a splitting mechanism -reminiscent of the doublet triplet splitting- may protect the neutral Higgs components from a heavy mass term. We analyze the implications of each individual representation which in principle is available in these models in order to specify the minimal spectrum required to build up a consistent PS model which reconciles the low energy data. A short discussion is devoted on the effects of stringy instanton corrections, particularly those generating missing Yukawa couplings and contributing to the fermion mass textures. We discuss the correlations of the intersecting D-brane spectra with those obtained from Gepner constructions and analyze the superpotential, the resulting mass textures and the low energy implications of some examples of the latter along the lines proposed above.

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