Experimental tests of curvature couplings of Fermions in General Relativity

Details Experimental tests of curvature couplings of Fermions in General Relativity Experimental tests of curvature couplings of Fermions in General Relativity

2002-01-18

arxiv.org/abs/hep-ph/0201172v2

Phys.Rev. D65 (2002) 122001

Physics

High Energy Physics

High Energy Physics - Phenomenology

Latex file 9 pages. Version to appear in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.65.122001

Spin 1/2 particles in geodesic trajectories experience no gravitational potential but they still have non-zero couplings to the curvature tensor. The effect of space time curvature on fermions can be parameterized by a vector and a pseudo-vector 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.

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