CEDM constraints on modified sfermion universality and spontaneous CP violation
CEDM constraints on modified sfermion universality and spontaneous CP violation
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DOI：
10.1143/ptp.122.659
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发表时间：
2009-01
影响因子：
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通讯作者：
M. Ishiduki;S.-G. Kim;N. Maekawa;K. Sakurai
中科院分区：
文献类型：
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作者：
M. Ishiduki;S.-G. Kim;N. Maekawa;K. Sakurai
我们讨论了修改Sfermion软质量普适性时产生的超对称CP问题。考虑到自然性，我们将第三代SU(5)10粒子费米子质量置于弱标度中。其他的Sfermion质量被假定为普遍的，数量级为TeV尺度，以削弱味道变化的中性电流过程和电偶极矩(EDM)的约束。然而，这种修正通常通过弱尺度停止环引起非常大的上夸克色度电火花(CEDM)。为了抑制这种CEDM，我们提出了一种味结构，其中上夸克(S)的参数是实的，而下(S)夸克和带电(S)轻子的参数在大统一理论(GUT)尺度下是复杂的。结果表明，在这种装置下，上夸克CEDM可以被抑制在当前和未来实验具有灵敏度的范围内。我们简要说明了在具有SU(2)味道对称性的E6SUSY腔中，通过自发的CP破坏，简单地实现了具有实上(S)夸克扇区的修正的Sfermion普适性的这些特殊形式。主题指数：113,140,142,152,158
We discuss the supersymmetric CP problem that arises when the sfermion soft mass universality is modified. We place the 3rd generation SU(5) 10-plet sfermion masses in the weak scale in view of the naturalness. The other sfermion masses are assumed to be universal and to be of order a TeV scale to weaken the flavor changing neutral current processes and electric dipole moment (EDM) constraints. However, this modification generically induces very large up quark chromo-EDM (CEDM) via the weak-scale stop loop. To suppress this CEDM, we propose a certain type of flavor structure where the parameters of the up(s)quark sector are real, whereas those of the down-(s)quark and charged (s)lepton sectors are complex at the grand unified theory (GUT) scale. It is shown that, in this setup, up quark CEDM can be suppressed within the range where the current and future experiments have their sensitivity. We briefly illustrate the simple realization of these particular forms of the modified sfermion universality with real up-(s)quark sector by spontaneous CP violation in E6 SUSY GUT with SU(2) flavor symmetry. Subject Index: 113, 140, 142, 152, 158