• DOI:10.1038/nature10260
Corpus ID: 4376768

Two-photon laser spectroscopy of antiprotonic helium and the antiproton-to-electron mass ratio

@article{Hori2011TwophotonLS,
  title={Two-photon laser spectroscopy of antiprotonic helium and the antiproton-to-electron mass ratio},
  author={M. Hori and A. S'ot'er and D. Barna and A. Dax and R. Hayano and S. Friedreich and B. Juh{\'a}sz and T. Pask and E. Widmann and D. Horv{\'a}th and L. Venturelli and N. Zurlo},
  journal={Nature},
  year={2011},
  volume={475},
  pages={484-488}
}

M. Hori, A. S'ot'er, +9 authors N. Zurlo

Published 2011

Physics, Medicine

Nature

Physical laws are believed to be invariant under the combined transformations of charge, parity and time reversal (CPT symmetry). This implies that an antimatter particle has exactly the same mass and absolute value of charge as its particle counterpart. Metastable antiprotonic helium (He+) is a three-body atom consisting of a normal helium nucleus, an electron in its ground state and an antiproton () occupying a Rydberg state with high principal and angular momentum quantum numbers… CONTINUE READING

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