title: New CP-violation and preferred-frame tests with polarized electrons.
abstract: We used a torsion pendulum containing approximately 9 x 10(22) polarized electrons to search for CP-violating interactions between the pendulum's electrons and unpolarized matter in the laboratory's surroundings or the Sun, and to test for preferred-frame effects that would precess the electrons about a direction fixed in inertial space. We find, /g(P)(e)g(S)(N)//(Planck's constant x c) < 1.7 x 10(-36), and /g(A)(e)g(V)(N)//(Planck's constant x c) < 4.8 x 10(-56) for lambda > 1 AU. Our preferred-frame constraints, interpreted in the Kostelecký framework, set an upper limit on the parameter /b(e)/ <or= 5.0 x 10(-21) eV that should be compared to the benchmark value m(e)(2)/M(Planck)= 2 x 10(-17) eV.
authors.affiliation: Center for Experimental Nuclear Physics and Astrophysics, Box 354290, University of Washington, Seattle, 98195-4290, USA.
authors.forename: B R
authors.initials: BR
authors.lastname: Heckel
authors.forename: C E
authors.initials: CE
authors.lastname: Cramer
authors.forename: T S
authors.initials: TS
authors.lastname: Cook
authors.forename: E G
authors.initials: EG
authors.lastname: Adelberger
authors.forename: S
authors.initials: S
authors.lastname: Schlamminger
authors.forename: U
authors.initials: U
authors.lastname: Schmidt