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APS » Journals » Phys. Rev. Lett. » Volume 93 » Issue 23
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Phys. Rev. Lett. 93, 230801 (2004) [4 pages]

Bound on Lorentz and CPT Violating Boost Effects for the Neutron

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F. Canè, D. Bear, D. F. Phillips, M. S. Rosen, C. L. Smallwood, R. E. Stoner, and R. L. Walsworth
Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts 02138, USA

V. Alan Kostelecký
Physics Department, Indiana University, Bloomington, Indiana 47405, USA

Received 29 August 2003; published 30 November 2004

A search for an annual variation of a daily sidereal modulation of the frequency difference between colocated 129Xe and 3He Zeeman masers sets a stringent limit on boost-dependent Lorentz and CPT violation involving the neutron, consistent with no effect at the level of 150 nHz. In the framework of the general standard-model extension, the present result provides the first clean test for the fermion sector of the symmetry of spacetime under boost transformations at a level of 10-27  GeV.

© 2004 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.93.230801
DOI:
10.1103/PhysRevLett.93.230801
PACS:
06.30.Ft, 11.30.Cp, 11.30.Er, 32.60.+i
 
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