We study the effect of the "chromo-electric" dipole moment on the electric dipole moment(EDM) of the neutron in the two Higgs doublet model. We systematically investigate the Weinberg's operator O_<3g> = GGG^^~ and the operator O_<qg> = q^^-σG^^~q, in the cases of tanβ ≫ 1, tanβ ≪ 1 and tanβ ≃ 1. It is shown that O_<sg> gives the main contribution to the neutron EDM compared to the other operators, and also that the contributions of O_<ug> and O_<3g> cancel out each other. It is pointed out that the inclusion of second lightest neutral Higgs scalar adding to the lightest one is of essential importance to estimate the neutron EDM. The neutron EDM is considerably reduced due to the destructive contribution with each other if the mass difference of the two Higgs scalars is of the order O(50GeV).
雑誌名
Progress of theoretical physics
巻
91
号
5
ページ
915 - 926
発行年
1994
出版者
理論物理学刊行会
ISSN
0033-068X
書誌情報
Progress of theoretical physics. 1994, 91(5), p. 915-926.
Neutron electric dipole moment in two Higgs doublet model.
matsudam022.pdf
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