The searching for the electric dipole moments (EDMs) of neutron ( d n ), b quark ( d b ) and c quark ( d c ) gives strict upper bounds on these quantities. And recently, new up- per bounds on d b , d c are obtained by the strict limit on d n . The models of new physics (NP) with additional CP-violating (CPV) sources are constrained strictly by these EDMs. In this work, we focus on the CPV effects on these EDMs in the minimal supersymmetric extension (MSSM) of the SM with local B − L gauge symmetry (B-LSSM). The contributions from one-loop and some two-loop diagrams to the quark EDM are given in general form, which can also be used in the calculation of quark EDM in other models of NP. Considering the constrains from updated experimental data, the numerical results show that the two-loop corrections can make important contributions to these EDMs. Compared with the MSSM, the effects of new CPV phases and new parameters in the B-LSSM on these EDMs are also explored.

中文翻译：

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B-LSSM 中中子和重夸克的电偶极矩

中子 (dn)、b 夸克 (db) 和 c 夸克 (dc) 的电偶极矩 (EDM) 的搜索给出了这些量的严格上限。最近，通过对 dn 的严格限制获得了 db , dc 的新上限。具有额外 CP 违反 (CPV) 源的新物理 (NP) 模型受到这些 EDM 的严格约束。在这项工作中，我们专注于在具有局部 B-L 规范对称性 (B-LSSM) 的 SM 的最小超对称扩展 (MSSM) 中对这些 EDM 的 CPV 效应。给出了单环图和一些双环图对夸克电火花加工的贡献的一般形式，也可用于其他NP模型中夸克电火花加工的计算。考虑到来自更新实验数据的约束，数值结果表明双回路校正可以对这些 EDM 做出重要贡献。