Special relativity and the single antiproton: Fortyfold improved comparison of p» and p charge-to-mass ratios

G. Gabrielse*, D. Phillips, W. Quint, H. Kalinowsky, G. Rouleau, W. Jhe

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

82 Scopus citations

Abstract

The measured ratio of charge-to-mass ratios for the antiproton and proton is 1.000 000 001 50.000 000 001 1. This 1 part in 109 comparison (1 ppb) is possible because a single p» or p is now directly observed while trapped in an open access Penning trap. The comparison is the most accurate mass spectrometry of particles with opposite charge, and is the most sensitive test of CPT invariance for a baryon system. It is 40 times more accurate than our earlier comparison with many trapped antiprotons and protons, and is more than 45 000 times more accurate than earlier comparisons made with other techniques.

Original languageEnglish (US)
Pages (from-to)3544-3547
Number of pages4
JournalPhysical review letters
Volume74
Issue number18
DOIs
StatePublished - 1995

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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