Precision mass spectroscopy of the antiproton and proton using simultaneously trapped particles

G. Gabrielse, A. Khabbaz, D. S. Hall, C. Heimann, H. Kalinowsky, W. Jhe

Research output: Contribution to journalArticlepeer-review

360 Scopus citations

Abstract

This last of a series of three measurements improves the comparison of antiproton (p) and proton (p) by almost a factor of 106 over earlier exotic atom measurements, and is the most precise CPT test with baryons by a similar large factor. Measuring the cyclotron frequencies of a simultaneously trapped p and H ion establishes that the ratio of q/m for p and p is -0.99999999991 ± 0.00000000009, more than 10 times the accuracy over our previous measurement. This 9 × 10-11 comparison makes the first use of simultaneously trapped particles for sub-ppb spectroscopy.

Original languageEnglish (US)
Pages (from-to)3198-3201
Number of pages4
JournalPhysical review letters
Volume82
Issue number16
DOIs
StatePublished - Jan 1 1999

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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