Nuclear electric dipole moments in chiral effective field theory
Nuclear electric dipole moments in chiral effective field theory
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DOI：
10.1007/jhep03(2015)104
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发表时间：
2015-03-19
影响因子：
5.4
通讯作者：
Wirzba, A.
中科院分区：
文献类型：
--
作者：
Bsaisou, J.;de Vries, J.;Wirzba, A.
我们在手性有效场理论的框架内提供了氘核、日离子和海卫一的电偶极矩的一致且完整的计算。 CP 守恒和 CP 破坏相互作用被平等对待，我们将 CP 破坏一核子、二核子和三核子算子视为手性功率计数中的下一个前导序。特别是，我们首次计算了 CP 破坏三介子算子引起的 EDM 贡献。我们发现，CP 破坏核子-核子接触相互作用的影响比之前基于 CP 保守核子-核子相互作用现象学模型的研究中发现的影响更大。我们的结果适用于强子区域任何 CP 破坏模型，可用于测试 CP 破坏的各种场景。作为例子，我们研究了我们的结果对 QCD theta 项和最小左右对称模型的影响。
We provide a consistent and complete calculation of the electric dipole moments of the deuteron, helion, and triton in the framework of chiral effective field theory. The CP-conserving and CP-violating interactions are treated on equal footing and we consider CP-violating one-, two-, and three-nucleon operators up to next-to-leading-order in the chiral power counting. In particular, we calculate for the first time EDM contributions induced by the CP-violating three-pion operator. We find that effects of CP-violating nucleon-nucleon contact interactions are larger than those found in previous studies based on phenomenological models for the CP-conserving nucleon-nucleon interactions. Our results which apply to any model of CP violation in the hadronic sector can be used to test various scenarios of CP violation. As examples, we study the implications of our results on the QCD theta-term and the minimal left-right symmetric model.