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arXiv 1102.4105hep-ph
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A4扭曲的额外维模型中味道破坏的抑制

Suppression of flavor violation in an A4 warped extra dimensional model

Avihay Kadosh

摘要:

为了同时解释夸克和轻子的观测质量和混合模式,我们最近提出了一个基于非阿贝尔离散味群A4的模型(JHEP 08(2010)115),该模型在一个带有大块希格斯粒子的保管RS装置中实现。我们表明,标准模型的味道结构可以实现内的零模近似(ZMA),近tribimaxial(TBM)中微子混合和一个现实的CKM矩阵,而温和的假设。相对于味无政府模型,该框架的一个重要优点是消除了树级KK胶子对ε_K的危险贡献,抑制了新物理单圈对中子EDM,ε ′/ε,b->sγ和Higgs介导的味变中性流(FCNC)过程的贡献。这些结果是在ZMA之外获得的,以便解释所有代的零模和第一Kaluza-Klein(KK)模的完整风味结构和混合。由此产生的KK质量尺度上的约束被证明是显着放松相比,风味无政府状态的情况下,明确显示的作用,非阿贝尔离散风味对称性放松风味违反边界内的RS设置。作为我们分析的副产品,我们也得到了相同的贡献,保管无政府的情况下,两个SU(2)_R的双峰为每个费米子代。

英文摘要:

In an attempt to simultaneously explain the observed masses and mixing patterns of both quarks and leptons, we recently proposed a model (JHEP08(2010)115) based on the non abelian discrete flavor group A4, implemented in a custodial RS setup with a bulk Higgs. We showed that the standard model flavor structure can be realized within the zero mode approximation (ZMA), with nearly tribimaximal (TBM) neutrino mixing and a realistic CKM matrix with rather mild assumptions. An important advantage of this framework with respect to flavor anarchic models is the vanishing of the dangerous tree level KK gluon contribution to ε_K and the suppression of the new physics one loop contributions to the neutron EDM, ε'/ε, b->sγand Higgs mediated flavor changing neutral current (FCNC) processes. These results are obtained beyond the ZMA, in order to account for the the full flavor structure and mixing of the zero modes and first Kaluza-Klein (KK) modes of all generations. The resulting constraints on the KK mass scale are shown to be significantly relaxed compared to the flavor anarchic case, showing explicitly the role of non abelian discrete flavor symmetries in relaxing flavor violation bounds within the RS setup. As a byproduct of our analysis we also obtain the same contributions for the custodial anarchic case with two SU(2)_R doublets for each fermion generation.

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