arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv hep-th/0403003hep-th
收藏

SO(10)杂种优势M理论真空

SO(10) heterotic M-theory vacua

Richard S. Garavuso

摘要:

标准模型光谱的SO(10)嵌入得到中微子质量证据的支持。本文采用已有的形式研究了一类具有SO(10)大统一群的杂化M-理论真空。在具有第一同伦群pi_{1}(Z)= Z_{2}的纤维环Z = X/tau_{X}上实现了N = 1超对称的四维紧化.这里X是一个椭圆纤维的Calabi-Yau 3-fold,它有两个整体截面,tau_{X}是X上的一个自由作用对合.这类真空在可观测扇区中有三代手征费米子的净数目,并且在体空间中可能包含包裹Z中全纯曲线的M5-膜。考虑了在可观测扇区中瞬子荷为零和非零的双光子系统。后一种情况对应于潜在可行的物质汤川耦合。由于pi_{1}(Z)= Z_{2},大统一群可以用Z_{2} Wilson线破缺。现实的自由费米子模型保留了标准模型谱的SO(10)嵌入。这些模型有一个阶段,在其建设相应的Z_{2} x Z_{2} orbifold紧化的弱耦合10维杂化弦。这种对应关系确定了具有上述Z和X结构的相关卡-丘三褶皱。这反过来又允许上述形式主义被用来研究与现实的自由费米子模型相关的杂种M理论真空。讨论了在杂合M-理论极限下如何再现这些模型中的顶夸克汤川耦合。

英文摘要:

The SO(10) embedding of the Standard Model spectrum is supported by evidence for neutrino masses. This thesis adapts the available formalism to study a class of heterotic M-theory vacua with SO(10) grand unification group. Compactification to four dimensions with N = 1 supersymmetry is achieved on a torus fibered Calabi-Yau 3-fold Z = X / tau_{X} with first homotopy group pi_{1}(Z) = Z_{2}. Here X is an elliptically fibered Calabi-Yau 3-fold which admits two global sections and tau_{X} is a freely acting involution on X. The vacua in this class have net number of three generations of chiral fermions in the observable sector and may contain M5-branes in the bulk space which wrap holomorphic curves in Z. Vacua with nonvanishing and vanishing instanton charges in the observable sector are considered. The latter case corresponds to potentially viable matter Yukawa couplings. Since pi_{1}(Z) = Z_{2}, the grand unification group can be broken with Z_{2} Wilson lines. Realistic free-fermionic models preserve the SO(10) embedding of the Standard Model spectrum. These models have a stage in their construction which corresponds to Z_{2} x Z_{2} orbifold compactification of the weakly coupled 10-dimensional heterotic string. This correspondence identifies associated Calabi-Yau 3-folds which possess the structure of the above Z and X. This, in turn, allows the above formalism to be used to study heterotic M-theory vacua associated with realistic free-fermionic models. It is argued how the top quark Yukawa coupling in these models can be reproduced in the heterotic M-theory limit.

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。

↑