Slepton Flavor Nonuniversality, the Muon EDM and its Proposed sensitive Search at Brookhaven

Abstract

We analyze the electric dipole moment of the electron ($d_e$), of the neutron ($d_n$) and of the muon ($d_{\hat{I}}¼$) using the cancellation mechanism in the presence of nonuniversalities of the soft breaking parameters. It is shown that the nonuniversalities in the slepton sector produce a strong violation of the scaling relation $d_{\hat{I}}¼/d_e\simeq m_{\hat{I}}¼/m_e$ in the cancellation region. An analysis of $d_e,d_n$ and $d_{\hat{I}}¼$ under the constraints of the current experimental limits on $d_e$ and $d_n$ and under the constraints of the recent Brookhaven result on $g_{\hat{I}}¼-2$ shows that in the non-scaling region $d_{\hat{I}}¼$ can be as large as ($10^{-24}-10^{-23}$)ecm and thus within reach of the recently proposed Brookhaven experiment for a sensitive search for $d_{\hat{I}}¼$ at the level of $10^{-24}$ ecm.

24 pages, Latex, including 5 figures with additional references