title: Improved limit on the permanent electric dipole moment of 199Hg.
abstract: We report the results of a new experimental search for a permanent electric dipole moment of 199Hg utilizing a stack of four vapor cells. We find d(199Hg)=(0.49+/-1.29_{stat}+/-0.76_{syst})x10;{-29} e cm, and interpret this as a new upper bound, |d(199Hg)|<3.1x10;{-29} e cm (95% C.L.). This result improves our previous 199Hg limit by a factor of 7, and can be used to set new constraints on CP violation in physics beyond the standard model.
authors.affiliation: Department of Physics, University of Washington, Seattle, Washington 98195, USA.
authors.forename: W C
authors.initials: WC
authors.lastname: Griffith
authors.forename: M D
authors.initials: MD
authors.lastname: Swallows
authors.forename: T H
authors.initials: TH
authors.lastname: Loftus
authors.forename: M V
authors.initials: MV
authors.lastname: Romalis
authors.forename: B R
authors.initials: BR
authors.lastname: Heckel
authors.forename: E N
authors.initials: EN
authors.lastname: Fortson