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arXiv 0802.0894hep-ph
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生成对称性与E_6统一

Generation Symmetry and E_6 Unification

Berthold Stech, Zurab Tavartkiladze

摘要:

大统一群E_6与生成对称群SO(3)_g相结合。汤川相互作用中的耦合矩阵与标量场的真空期望值一致,真空期望值是生成对称性的表示。这些值决定了费米子的等级以及它们的混合和CP破坏。这种世代混合与标准模型费米子与E_6最低代表中的重费米子的混合一起出现。观察到带电和中性费米子之间的密切联系,例如CKM混合与轻中微子的质量分裂。只有很少的参数数值拟合定量再现所有已知的费米子属性。该模型预言了一个倒置的中微子等级,并给出了相当严格的轻、重中微子质量以及0ν2β衰变参数的值。它还预测,两个最轻的六个“右手”中微子的质量位于低TeV区域。

英文摘要:

The group E_6 for grand unification is combined with the generation symmetry group SO(3)_g. The coupling matrices in the Yukawa interaction are identified with the vacuum expectation values of scalar fields which are representations of the generation symmetry. These values determine the hierarchy of the fermions as well as their mixings and CP-violation. This generation mixing appears in conjunction with the mixing of the standard model fermions with the heavy fermions present in the lowest representation of E_6. A close connection between charged and neutral fermions is observed relating for instance the CKM mixings with the mass splittings of the light neutrinos. Numerical fits with only few parameters reproduce quantitatively all known fermion properties. The model predicts an inverted neutrino hierarchy and gives rather strict values for the light and heavy neutrino masses as well as for the 0ν2βdecay parameter. It also predicts that the masses of the two lightest of six `right handed' neutrinos lie in the low TeV region.

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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