Equivalence principle for antiparticles and its limitations

@article{Jentschura2019EquivalencePF,
  title={Equivalence principle for antiparticles and its limitations},
  author={Ulrich D. Jentschura},
  journal={International Journal of Modern Physics A},
  year={2019}
}
  • U. Jentschura
  • Published 20 October 2019
  • Physics
  • International Journal of Modern Physics A
We investigate the particle–antiparticle symmetry of the gravitationally coupled Dirac equation, both on the basis of the gravitational central-field problem and in general curved space–time backgrounds. First, we investigate the central-field problem with the help of a Foldy–Wouthuysen transformation. This disentangles the particle from the antiparticle solutions, and leads to a “matching relation” of the inertial and the gravitational mass, which is valid for both particles as well as… 
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TLDR
The result can be interpreted as a stringent test of the weak equivalence principle of general relativity using baryonic antimatter, and it sets a new limit on the gravitational anomaly parameter of < 8.7 × 10−7.
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