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arXiv 1902.05360hep-ph
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重正化效应对电弱相互作用大质量粒子模型电偶极矩的影响

Renormalization Effects on Electric Dipole Moments in Electroweakly Interacting Massive Particle Models

Wataru Kuramoto, Takumi Kuwahara, Ryo Nagai

摘要:

本文研究了具有新的电弱相互作用的大质量费米子模型中电偶极矩的重整化效应。电偶极矩是由有效算符产生的,有效算符是在模型中以一定尺度积分出重粒子而产生的。给出了从算符产生的尺度到电弱尺度的有效算符Wilson系数的重整化群方程。我们的数值研究主要集中在超对称小劈裂情形和大质量粒子暗物质弱相互作用情形下的电偶极矩。结果表明,重整化效应可以得到一个增强因子的数量级为O(10)%的最小分裂的情况下,并在最小的暗物质模型是超过2。

英文摘要:

We study the renormalization effects on electric dipole moments in the models with new electroweakly interacting massive fermions. The electric dipole moments are generated by the effective operators which arise from integrating out heavy particles at some scale in the models. We give the renormalization group equation for the Wilson coefficients of the effective operators from the scale where the operators are generated to the electroweak scale. Our numerical studies focus on the electric dipole moments in the mini-split supersymmetric scenario and the electroweakly interacting massive particle dark matter scenario. It turns out that the renormalization effects can give an enhancement factor being of the order of O(10)% in the mini-split scenario and being more than two in the minimal dark matter model.

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