THE ELECTRON ELECTRIC-DIPOLE MOMENT FOR A CP-VIOLATING NEUTRAL HIGGS SECTOR

被引：42

作者：

GUNION, JF ^{[1
]}

VEGA, R ^{[1
]}

机构：

[1] UNIV CALIF DAVIS,DEPT PHYS,DAVIS,CA 95616

来源：

PHYSICS LETTERS B | 1990年 / 251卷 / 01期

基金：

美国国家航空航天局;

关键词：

D O I：

10.1016/0370-2693(90)90246-3

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We consider the two-loop graphs for the electron's electric dipole moment that arise in an SU(2) × U(1) gauge theory with CP-violating two-doublet (neutral) Higgs sector. We identify and compute the additional graphs, beyond the top-loop and W-loop-related contributions considered by Barr and Zee, that yield non-zero contributions. These have the same sign as the t-loop graphs, whereas the W-loop-related graphs have the opposite sign. Combining all graphs at large tan β yields a relatively small electron electric dipole moment, even when CP violation is maximal, unless one of the neutral Higgs boson masses is of order mw or lighter and all other neutral Higgs bosons are much heavier. © 1990.

引用

页码：157 / 162

页数：6

共 9 条

[1] ELECTRIC-DIPOLE MOMENT OF THE ELECTRON AND OF THE NEUTRON [J].