Non-unitarity of CKM matrix from vector singlet quark mixing and neutron electric dipole moment

被引：13

作者：

Liao, Y

Li, XY ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China

[2] Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China

来源：

PHYSICS LETTERS B | 2001年 / 503卷 / 3-4期

基金：

中国国家自然科学基金;

关键词：

electric dipole moment; CKM matrix; singlet quark;

D O I：

10.1016/S0370-2693(01)00251-9

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In the standard model (SM) the lowest order contribution to the quark electric dipole moment (EDM) occurs at the three loop level. We show that the non-unitarity of the CKM matrix in models with an extended quark sector typically gives rise to a quark EDM at the two loop level which has no GIM-like suppression factors except the external quark mass. The induced neutron EDM is of order 10(-29) e cm and can be well within the reach of the next generation of experiments if it is further enhanced by long distance physics as happens in the SM. (C) 2001 Published by Elsevier Science B.V.

引用

页码：301 / 306

页数：6

共 69 条

[1] THE BACKGROUND FIELD METHOD BEYOND ONE LOOP [J].