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arXiv 1106.4804hep-thhep-ph
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光滑Calabi-Yau三重上的200个杂种优势标准模型

Two Hundred Heterotic Standard Models on Smooth Calabi-Yau Threefolds

Lara B. Anderson, James Gray, Andre Lukas, Eran Palti

摘要:

在纯阿贝尔内部规范场的存在下,通过对光滑Calabi-Yau三重空间进行紧化,构造了杂种优势标准模型.一个系统的搜索完整的交叉卡-丘流形小于6 Kahler参数导致超过200个这样的模型,我们目前。这些模型中的每一个都精确地具有MSSM的物质谱,至少一对希格斯偶线,标准模型规范群,并且没有外来物。对于大约100个这样的模型,天真地,有四个额外的U(1)对称性,然而这些都是格林-施瓦茨反常的,因此是巨大的。在其余的情况下,三个U(1)对称性是反常的,而第四个无质量的对称性可以被单重态真空期望值自发破缺。额外的全局U(1)对称性的存在,以及切换单重态真空期望值的可能性,导致了一个丰富的现象,这是一个特定的例子说明。我们的标准模型数据库,可以通过简单地扩展基于计算机的搜索进一步扩大,允许一个详细的和系统的弦标准模型的唯象分析,包括问题,如汤川耦合,R-宇称破坏,质子稳定性和中微子质量的结构。

英文摘要:

We construct heterotic standard models by compactifying on smooth Calabi-Yau three-folds in the presence of purely Abelian internal gauge fields. A systematic search over complete intersection Calabi-Yau manifolds with less than six Kahler parameters leads to over 200 such models which we present. Each of these models has precisely the matter spectrum of the MSSM, at least one pair of Higgs doublets, the standard model gauge group and no exotics. For about 100 of these models there are, naively, four additional U(1) symmetries, however these are Green-Schwarz anomalous and, hence, massive. In the remaining cases, three U(1) symmetries are anomalous while the fourth, massless one can be spontaneously broken by singlet vacuum expectation values. The presence of additional global U(1) symmetries, together with the possibility of switching on singlet vacuum expectation values, leads to a rich phenomenology which is illustrated for a particular example. Our database of standard models, which can be further enlarged by simply extending the computer-based search, allows for a detailed and systematic phenomenological analysis of string standard models, covering issues such as the structure of Yukawa couplings, R-parity violation, proton stability and neutrino masses.

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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