Families as neighbors in extra dimension
Families as neighbors in extra dimension
复制标题
在额外维度中作为邻居的家庭
DOI：
10.1016/s0370-2693(00)00083-6
复制
发表时间：
2000
影响因子：
4.4
通讯作者：
M. Shifman
中科院分区：
文献类型：
--
作者：
G. Dvali;M. Shifman
我们提出了一种新的机制来解释费米子等级，而不引入任何家庭对称性。相反，我们假设不同的世代生活在不同的膜上，这些膜嵌入在一个相对较大的额外维度中，规范场可以在那里传播。电弱对称性在一个单独的膜上破缺，这是体中指数衰减的希格斯分布的一个来源。由此产生的费米子质量和混合是由费米子和希格斯波函数的指数抑制重叠决定的，并且是自动分层的，即使所有副本都是相同的，也没有距离的分层。在这个框架中，众所周知的模式的“最近邻混合”的预测，由于家庭是字面上的邻居在额外的空间。这幅图也可能提供一种新的层次弱超对称破缺的方法，只要三个族膜的组合是非BPS构型，尽管它们中的每一个，单独采取，是。这导致指数弱超对称破缺。我们还讨论了在紧空间中嵌入全同膜的问题和费米零模的局部化问题。
We propose a new mechanism for explanation of the fermion hierarchy without introducing any family symmetries. Instead, we postulate that different generations live on different branes embedded in a relatively large extra dimension, where gauge fields can propagate. The electroweak symmetry is broken on a separate brane, which is a source of exponentially decaying Higgs profile in the bulk. The resulting fermion masses and mixings are determined by an exponentially suppressed overlap of the fermion and Higgs wave functions and are automatically hierarchical even if all copies are identical and there is no hierarchy of distances. In this framework the well known pattern of the “nearest neighbor mixing” is predicted due to the fact that the families are literally neighbors in the extra space. This picture may also provide a new way of a hierarchically weak supersymmetry breaking, provided that the combination of three family branes is a non-BPS configuration, although each of them, individually taken, is. This results in exponentially weak supersymmetry breaking. We also discuss the issue of embedding identical branes in the compact spaces and localization of the fermionic zero modes.