Neutron electric dipole moment in a supersymmetric model with singlet quarks

Abstract

The neutron electric dipole moment is investigated in a supersymmetric electroweak model admitting ${\mathrm{SU}(2)}_W$ 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 $\sim 10^{-26}e\mathrm{cm}$ 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.

16 pages

References in corpus (8)

• Progress in Electroweak Baryogenesis
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• Quark Singlets: Implications and Constraints
• Electric dipole moments as a test of supersymmetric unification
• Supersymmtric Baryogenesis
• On soft breaking and CP phases in the supersymmetric standard model
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Cited by in corpus (4)

• Quark mixings and flavor changing interactions with singlet quarks
• Flavor-changing interactions with singlet quarks and their implications for the LHC
• Flavor nonconservation and CP violation from quark mixings with singlet quarks
• A Solution to the Strong CP Problem with Gauge-Mediated Supersymmetry Breaking