Neutron Electric Dipole Moment in the Minimal Supersymmetric Standard Model

Details Neutron Electric Dipole Moment in the Minimal Supersymmetric Standard Model Neutron Electric Dipole Moment in the Minimal Supersymmetric Standard Model

1995-03-20

arxiv.org/abs/hep-ph/9503383v2

Nucl.Phys.B449:49-68,1995

Physics

High Energy Physics

High Energy Physics - Phenomenology

27 pages, LaTeX file with figures, several misprints in pp. 7, 14, 20 and 24 are corrected

Scientific paper

10.1016/0550-3213(95)00238-N

Neutron electric dipole moment (EDM) due to single quark EDM and to the transition EDM is calculated in the minimal supersymmetric standard model. Assuming that the Cabibbo-Kobayashi-Maskawa matrix at the grand unification scale is the only source of CP violation, complex phases are induced in parameters of soft supersymmetry breaking at low energies. Chargino one-loop diagram is found to give the dominant contribution of the order of $10^{-27}\sim 10^{-29}\:e\cdot$cm for quark EDM, assuming the light chargino mass and the universal scalar mass to be $50$ GeV and $100$ GeV, respectively. Therefore the neutron EDM in this class of model is difficult to measure experimentally. Gluino one-loop diagram also contributes due to the flavor changing gluino coupling. The transition EDM is found to give dominant contributions for certain parameter regions.

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