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

  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},
  • 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
    207 Citations

    Figures, Tables, and Topics from this paper

    Recent progress of laser spectroscopy experiments on antiprotonic helium
    • M. Hori
    • Physics, Medicine
    • Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
    • 2018
    • 1
    Precision measurement of the mass difference between light nuclei and anti-matter counterparts
    • Highly Influenced
    High-precision comparison of the antiproton-to-proton charge-to-mass ratio
    • 85
    • PDF


    Trapped antihydrogen
    • 59
    • PDF
    Determination of the antiproton-to-electron mass ratio by precision laser spectroscopy of pHe+.
    • 103
    • PDF
    Testing CPT Invariance with Antiprotonic Helium Atoms
    • 2
    The size of the proton
    • 799
    • PDF