Description:

Abstract: Abstract: The ACME collaboration has recently announced a new bound on the electron EDM, |d_e| < 1.1 X 10^{-29} e cm. This bound is a powerful constraint on CP-violating new physics; even new physics generating electron EDM at two-loop is constrained at multi-TeV scale. I will show the power of the electron EDM bound first by a general order-of-magnitude analysis, then by applying the bound on two specific models: one is SUSY, where new physics involves the electroweak sector and couples to the Higgs. Many different SUSY scenarios with electron EDM generated at different loop orders are discussed. The constraints are also compared to the latest LHC searches and dark matter searches when applicable. The other model is the “QULE operators”, where new physics couples to the charm or top quark. From these analysis, we will see that the electron EDM bound is the leading constraint on a wide variety of theories of CP-violating new physics. I will also discuss the implications of future improvements in EDM searches.

Qianshu Lu, Harvard University

Host: CFP

Keywords: Physics, Center for Fundamental Physics