2002/01/31 by S. Mohanty, Sujata Mohanty, B. Mukhopadhyay +2 · 2 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Noncommutative and Quantum Gravity Theories #astro-ph #gr-qc #hep-ph
paper · pdf · doi:10.1103/physrevd.65.122001
published as Phys.Rev. D65 (2002) 122001 · Latex file 9 pages. Version to appear in Phys. Rev. D
arxiv created 2002/04/01 · openalex publication_date 2002/05/24 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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^\ensuremath-37 GeV, which is not far from the present bounds of \ensuremath∼10^\ensuremath-29 GeV on such CPT-violating couplings.