Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1994-01-26
Prog.Theor.Phys.91:915-926,1994
Physics
High Energy Physics
High Energy Physics - Phenomenology
20 pages with 12 figures. Figures will be sent by postal mail if requested. Latex
Scientific paper
10.1143/PTP.91.915
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 $O_{3g}=GG\t G$ and the operator $O_{qg}=\bar q\sigma\t Gq$, in the cases of $\tan\b\gg 1$, $\tan\b\ll 1$ and $\tan\b\simeq 1$. 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 $O(50\G)$.
Hayashi Tkemi
Koide Yoshio
Matsuda Masahisa
Tanimoto Morimitsu
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