从等向夸克色电偶极矩得出的中子电偶极矩

arXiv - PHYS - High Energy Physics - Lattice Pub Date : 2024-04-21 DOI:arxiv-2404.13516

Tanmoy BhattacharyaLos Alamos National Laboratory, Vincenzo CiriglianoUniversity of Washington, Rajan GuptaLos Alamos National Laboratory, Emanuele MereghettiLos Alamos National Laboratory, Jun-Sik YooLos Alamos National Laboratory, Boram YoonNVIDIA Corporation

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引用次数: 0

摘要

我们展示了晶格QCD研究中关于矢量夸克cEDM（qcEDM）算子对中子EDM贡献的结果。计算是在四个 2+1+1 味高度改进的交错夸克集合（由 MILC 合作组提供）上进行的，使用威尔逊-四叶草夸克来构建相关函数。我们使用非小轴向沃德特性（包括高达 O(a)的修正）来展示如何控制等矢量 qcEDM 算子与低维伪标量算子的幂发散混合。在前对数阶转换到 MS 方案之后，nEDM 的结果被呈现出来。

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Neutron electric dipole moment from isovector quark chromo-electric dipole moment

We present results from our lattice QCD study of the contribution of the isovector quark cEDM (qcEDM) operator to the neutron EDM. The calculation was carried out on four 2+1+1-flavor highly improved staggered quark ensembles (provided to us by the MILC collaboration) using Wilson-clover quarks to construct correlation functions. We use the nonsinglet axial Ward identity including corrections up to O(a) to show how to control the power-divergent mixing of the isovector qcEDM operator with the lower dimensional pseudoscalar operator. Results for the nEDM are presented after conversion to the MS scheme at the leading-log order.

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arXiv - PHYS - High Energy Physics - Lattice

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