New CP-violation and preferred-frame tests with polarized electrons |
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Authors: | Heckel B R Cramer C E Cook T S Adelberger E G Schlamminger S Schmidt U |
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Institution: | Center for Experimental Nuclear Physics and Astrophysics, Box 354290, University of Washington, Seattle, 98195-4290, USA. |
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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 Kostelecky framework, set an upper limit on the parameter /b(e)/
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