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arXiv 0710.2850hep-ph
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局域SU(5)从杂合弦到6D的统一

Local SU(5) Unification in 6D from the Heterotic String

C. Lüdeling

摘要:

我们提出了一个六维T^2/Z_2轨道折叠模型,它是杂合弦紧化到MSSM的中间步骤。该轨道包含两对不等价的不动点,分别具有不间断的局域规范群SU(5)和SU(2)xSU(4),它们的交集给出了标准模型规范群。所有的体异常和膜异常都被格林-施瓦茨机制抵消。在每一个SU(5)固定点上,都有一个定域的\bar{5} +10标准模型代,而第三代和Higgs场由于SU(5)在另一个固定点上的破缺而产生分裂的体多重态。

英文摘要:

We present a six-dimensional T^2/Z_2 orbifold model which arises as an intermediate step in the compactification of the heterotic string to the MSSM. The orbifold contains two pairs of inequivalent fixed points, with unbroken local gauge groups SU(5) and SU(2)xSU(4), respectively, the intersection of which gives the standard model gauge group. All bulk and brane anomalies are cancelled by the Green--Schwarz mechanism. At each SU(5) fixed point, there is a localised \bar{5}+10 standard model generation, while the third generation and the Higgs fields come in split bulk multiplets due to the breaking of SU(5) at the other fixed point.

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