Programme

O.5 -- Oral, IWTCP-2

Date: Wednesday, 30-07-2014

Time: 09h40 - 10h00

Enhanced Electron EDM with Minimal Flavor Violation

Jusak Tandean

National Taiwan University

The latest data from the ACME experiment have led to the most stringent limit to date on the electric dipole moment $d_e$ of the electron. Nevertheless, the standard model (SM) prediction for $d_e$ is many orders of magnitude below the new result, making this observable a powerful probe for physics beyond the SM. We perform a model-independent study of $d_e$ in the SM plus right handed neutrinos and its extension with the seesaw mechanism under the framework of minimal flavor violation (MFV). We find that $d_e$ crucially depends on whether neutrinos are Dirac or Majorana fermions. In the Majorana case, $d_e$ can reach its measured bound, which therefore constrains the scale of MFV to be above a few hundred GeV. We also consider extra CP-violating sources in the Yukawa couplings of the right-handed neutrinos. Such new sources can have important effects on $d_e$.

Presenter: Tandean Jusak