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

Author

Listed:
  • S. Ulmer

    (RIKEN, Ulmer Initiative Research Unit)

  • C. Smorra

    (RIKEN, Ulmer Initiative Research Unit
    CERN)

  • A. Mooser

    (RIKEN, Ulmer Initiative Research Unit)

  • K. Franke

    (RIKEN, Ulmer Initiative Research Unit
    Max-Planck-Institut für Kernphysik)

  • H. Nagahama

    (RIKEN, Ulmer Initiative Research Unit
    Graduate School of Arts and Sciences, University of Tokyo)

  • G. Schneider

    (RIKEN, Ulmer Initiative Research Unit
    Institut für Physik, Johannes Gutenberg-Universität)

  • T. Higuchi

    (RIKEN, Ulmer Initiative Research Unit
    Graduate School of Arts and Sciences, University of Tokyo)

  • S. Van Gorp

    (RIKEN, Atomic Physics Laboratory, Wako)

  • K. Blaum

    (Max-Planck-Institut für Kernphysik)

  • Y. Matsuda

    (Graduate School of Arts and Sciences, University of Tokyo)

  • W. Quint

    (GSI—Helmholtzzentrum für Schwerionenforschung)

  • J. Walz

    (Institut für Physik, Johannes Gutenberg-Universität
    Helmholtz Institut Mainz)

  • Y. Yamazaki

    (RIKEN, Atomic Physics Laboratory, Wako)

Abstract

The CPT theorem (the assumption that physical laws are invariant under simultaneous charge conjugation, parity transformation and time reversal) is central to the standard model of particle physics; here the charge-to-mass ratio of the antiproton is compared to that of the proton, with a precision of 69 parts per trillion, and the result supports the CPT theorem at the atto-electronvolt scale.

Suggested Citation

  • S. Ulmer & C. Smorra & A. Mooser & K. Franke & H. Nagahama & G. Schneider & T. Higuchi & S. Van Gorp & K. Blaum & Y. Matsuda & W. Quint & J. Walz & Y. Yamazaki, 2015. "High-precision comparison of the antiproton-to-proton charge-to-mass ratio," Nature, Nature, vol. 524(7564), pages 196-199, August.
    • Handle: RePEc:nat:nature:v:524:y:2015:i:7564:d:10.1038_nature14861
    DOI: 10.1038/nature14861
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