Neutron electric dipole moment in a supersymmetric model with singlet quarks
نویسندگان
چکیده
The neutron electric dipole moment is investigated in a supersymmetric electroweak model admitting SU(2)W singlet and Q = −1/3, say D-type, quarks. Significant CP violating phases appear in the coupling between the singlet D-type quarks and the ordinary d-type quarks. Then, through the d-D mixing effects on the squark mass terms the gluino one-loop diagrams provide naturally the contributions ∼ 10e cm comparable to the current experimental bound on the neutron electric dipole moment. The CP violation in the d-D coupling would also be relevant for the electroweak baryogenesis. 1 Present address: Hokkaido Electric Power Co., Inc., Sapporo 060-91, Japan. 2 Present address: Taiho 2 4 4 303, Atsuta-ku, Nagoya 456, Japan. 3 e-mail address: [email protected] PACS codes: 11.30.Er, 12.60.Jv, 13.40.Em, 14.65.-q keywords: neutron electric dipole moment, supersymmetry, singlet quark
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