Prospects for Testing Standard Model (SM) Extensions with Electron Electric Dipole Moment (EDM) Experiments

Split SUSY and other SM extensions with new sources of CP violation allow electron EDMs that approach the present experimental limits. A new generation of laboratory experiments using laser-cooled atoms is expected to push back those limits, further constraining theory or discovering new physics. A demonstration laser-cooled-atom fountain electron EDM experiment operating at LBNL will be described and the EDM sensitivity and immunity to systematics, of a full scale experiment, discussed.