Spontaneous CP violation in E6 SUSY GUT with SU(2) flavor and anomalous U(1) symmetries
Spontaneous CP violation in E6 SUSY GUT with SU(2) flavor and anomalous U(1) symmetries
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DOI：
10.1103/physrevd.80.115011
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发表时间：
2009-10
影响因子：
5
通讯作者：
M. Ishiduki;S.-G. Kim;N. Maekawa;K. Sakurai
中科院分区：
文献类型：
--
作者：
M. Ishiduki;S.-G. Kim;N. Maekawa;K. Sakurai
我们在E6超对称大统一理论中构造了一个自发CP破坏模型。在模型中，我们采用了SU（2）F味对称和反常U（1）A对称。引入SU（2）F味对称性，给出了Yukawa耦合的等级结构的起源，保证了sfermion软质量的普适性。引入反常的U（1）A对称性来实现二重态-三重态质量分裂，提供Yukawa耦合的等级结构的起源，并解决μ问题。在该模型中，CP通过SU（2）F破缺自发破缺，以提供Kobayashi-Maskawa相位并避免超对称CP问题。然而，当考虑风味部门中的CP违反效应时，模型的幼稚构造通常会导致不想要的结果，Arg[μB � ] = O（1）。我们通过施加离散对称来解决这个困难，并发现这个处方可以发挥额外的作用。它保证了真实的上夸克质量和Cabibbo角同时实现，而O（1）系数之间没有抵消。此外，严格的限制，从染色体电偶极矩的夸克可以满足不稳定的弱标度。离散对称性减少了自由参数的数量，但模型能够再现夸克和轻子的质量谱，混合@
We construct a model of spontaneous CP violation in E6 supersymmetric grand unified theory. In the model, we employ an SU(2)F flavor symmetry and an anomalous U(1)A symmetry. The SU(2)F flavor symmetry is introduced to provide the origin of hierarchical structures of Yukawa coupling and to ensure the universality of sfermion soft masses. The anomalous U(1)A symmetry is introduced to realize the doublet-triplet mass splitting, to provide the origin of hierarchical structures of Yukawa couplings, and to solve the µ problem. In the model, CP is spontaneously broken by the SU(2)F breaking in order to provide a Kobayashi-Maskawa phase and to evade the supersymmetric CP problem. However, a naive construction of the model generally leads to unwanted outcome, Arg[µb � ] = O(1), when CP violating effects in the flavor sector are taken into account. We cure this difficulty by imposing a discrete symmetry and find that this prescription can play additional roles. It ensures that realistic up-quark mass and Cabibbo angle are simultaneously realized without cancellation between O(1) coefficients. Also, severe constraints from the chromo electric dipole moment of the quark can be satisfied without destabilizing the weak scale. The discrete symmetry reduces the number of free parameters, but the model is capable of reproducing quark and lepton mass spectra, mixing @