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APS » Journals » Phys. Rev. Lett. » Volume 97 » Issue 2
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Phys. Rev. Lett. 97, 021603 (2006) [4 pages]

New CP-Violation and Preferred-Frame Tests with Polarized Electrons

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B. R. Heckel, C. E. Cramer, T. S. Cook, E. G. Adelberger, S. Schlamminger, and U. Schmidt*
Center for Experimental Nuclear Physics and Astrophysics, Box 354290, University of Washington, Seattle, Washington 98195-4290, USA

Received 4 May 2006; published 12 July 2006

We used a torsion pendulum containing ∼9×1022 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 |gPegSN|/(ℏc)<1.7×10-36 and |gAegVN|/(ℏc)<4.8×10-56 for λ>1  AU. Our preferred-frame constraints, interpreted in the Kostelecký framework, set an upper limit on the parameter |b˜e|≤5.0×10-21  eV that should be compared to the benchmark value me2/MPlanck=2×10-17  eV.

© 2006 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.97.021603
DOI:
10.1103/PhysRevLett.97.021603
PACS:
11.30.Cp, 11.30.Er, 12.20.Fv

*Current address: Physicalisches Institute, Universität Heidelberg, Philosophenweg 12, D-69120, Germany.

 
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