Neutron Electric Dipole Moment Constraint on Scale of Minimal Left-Right Symmetric Model

Details Neutron Electric Dipole Moment Constraint on Scale of Minimal Left-Right Symmetric Model Neutron Electric Dipole Moment Constraint on Scale of Minimal Left-Right Symmetric Model

2009-10-12

arxiv.org/abs/0910.2265v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

20 pages and 8 figures

Scientific paper

Using an effective theory approach, we calculate the neutron electric dipole moment (nEDM) in the minimal left-right symmetric model with both explicit and spontaneous CP violations. We integrate out heavy particles to obtain flavor-neutral CP-violating effective Lagrangian. We run the Wilson coefficients from the electroweak scale to the hadronic scale using one-loop renormalization group equations. Using the state-of-the-art hadronic matrix elements, we obtain the nEDM as a function of right-handed W-boson mass and CP-violating parameters. We use the current limit on nEDM combined with the kaon-decay parameter $\epsilon$ to provide the most stringent constraint yet on the left-right symmetric scale $ M_{W_R} > (10 \pm 3) $ TeV.

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