Gravity, Lorentz violation, and the standard model

  title={Gravity, Lorentz violation, and the standard model},
  author={Alan Kosteleck{\'y}},
  journal={Physical Review D},
The role of the gravitational sector in the Lorentz- and CPT-violating standard-model extension ~SME! is studied. A framework is developed for addressing this topic in the context of Riemann-Cartan spacetimes, which include as limiting cases the usual Riemann and Minkowski geometries. The methodology is first illustrated in the context of the QED extension in a Riemann-Cartan background. The full SME in this background is then considered, and the leading-order terms in the SME action involving… 

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