Reevaluation of neutron electric dipole moment with QCD sum rules

被引：65

作者：

Hisano, Junji ^{[1
,2
]}

Lee, Jeong Yong ^{[1
]}

Nagata, Natsumi ^{[1
,3
]}

Shimizu, Yasuhiro ^{[4
,5
]}

机构：

[1] Nagoya Univ, Dept Phys, Nagoya, Aichi 4648602, Japan

[2] Univ Tokyo, IPMU, TODIAS, Kashiwa, Chiba 2778568, Japan

[3] Univ Tokyo, Dept Phys, Tokyo 1130033, Japan

[4] Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan

[5] Tohoku Univ, IIAIR, Sendai, Miyagi 9808578, Japan

来源：

PHYSICAL REVIEW D | 2012年 / 85卷 / 11期

基金：

日本学术振兴会;

关键词：

RESONANCE PHYSICS; CP-VIOLATION;

D O I：

10.1103/PhysRevD.85.114044

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study the neutron electric dipole moment in the presence of the CP-violating operators up to dimension five in terms of the QCD sum rules. It is found that the operator product expansion calculation is robust when exploiting a particular interpolating field for a neutron, while there exist some uncertainties on the phenomenological side. By using input parameters obtained from the lattice calculation, we derive a conservative limit for the contributions of the CP-violating operators. We also show the detail of the derivation of the sum rules.

引用

页数：18

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