A GIM mechanism from extra dimensions
A GIM mechanism from extra dimensions
复制标题
DOI：
10.1088/1126-6708/2008/04/006
复制
发表时间：
2008-04-01
影响因子：
5.4
通讯作者：
Weiler, Andreas
中科院分区：
文献类型：
--
作者：
Cacciapaglia, Giacomo;Csaki, Csaba;Weiler, Andreas
我们探索如何通过使用体味和膜味对称性来保护额外维度的模型不受大的味道变化的中性电流的影响。我们表明，如果通过右手夸克的UV膜动力学混合引入味道混合，则可以在扭曲空间模型中建立GIM机制，例如Randall-Sundrum或复合Higgs模型。我们给出了一个具有最小味道违规和次要最小风味违规的模型的实际实现。后者不存在CP问题。我们考虑了一些现有的对这些模型的实验约束，这些约束由精密的电弱测试隐含。
We explore how to protect extra dimensional models from large flavor changing neutral currents by using bulk and brane flavor symmetries. We show that a GIM mechanism can be built in to warped space models such as Randall- Sundrum or composite Higgs models if flavor mixing is introduced via UV brane kinetic mixings for right handed quarks. We give a realistic implementation both for a model with minimal flavor violation and one with next- to- minimal flavor violation. The latter does not suffer from a CP problem. We consider some of the existing experimental constraints on these models implied by precision electroweak tests.