High-precision comparison of the antiproton-to-proton charge-to-mass ratio

@article{Ulmer2015HighprecisionCO,
  title={High-precision comparison of the antiproton-to-proton charge-to-mass ratio},
  author={Stefan Ulmer and Christian Smorra and Andreas H. Mooser and K. A. Franke and H. Nagahama and G. Schneider and Takashi Higuchi and Simon Van Gorp and Klaus Blaum and Yasuyuki Matsuda and Wolfgang Quint and Jochen Walz and Yasunori Yamazaki},
  journal={Nature},
  year={2015},
  volume={524},
  pages={196-199}
}
Invariance under the charge, parity, time-reversal (CPT) transformation is one of the fundamental symmetries of the standard model of particle physics. This CPT invariance implies that the fundamental properties of antiparticles and their matter-conjugates are identical, apart from signs. There is a deep link between CPT invariance and Lorentz symmetry—that is, the laws of nature seem to be invariant under the symmetry transformation of spacetime—although it is model dependent. A number of high… 
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