Phys. Rev. D 65, 122001 (2002) [3 pages]Experimental tests of curvature couplings of fermions in general relativityReceived 18 January 2002; published 24 May 2002 Spin-1/2 particles in geodesic trajectories experience no gravitational potential but they still have nonzero couplings to the curvature tensor. The effect of space-time curvature on fermions can be parametrized by a vector and a pseudovector potential. These apparent CPT-violating terms can be measured with satellite-based spin-polarized torsion balance and clock comparison experiments. The Earth’s curvature effect is of the order of 10-37 GeV, which is not far from the present bounds of ∼10-29 GeV on such CPT-violating couplings. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.65.122001
DOI:
10.1103/PhysRevD.65.122001
PACS:
04.80.Cc, 11.30.Er
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