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

Citation
G. Gabrielse et al., Precision mass spectroscopy of the antiproton and proton using simultaneously trapped particles, PHYS REV L, 82(16), 1999, pp. 3198-3201
Citations number
23
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
0031-9007 → ACNP
Volume
82
Issue
16
Year of publication
1999
Pages
3198 - 3201
Database
ISI
SICI code
0031-9007(19990419)82:16<3198:PMSOTA>2.0.ZU;2-N
Abstract
This last of a series of three measurements improves the comparison of anti proton ((p) over bar) and proton (p) by almost a factor of 10(6) over earli er exotic atom measurements, and is the most precise CPT test with baryons by a similar large factor. Measuring the cyclotron frequencies of a simulta neously trapped (p) over bar and H- ion establishes that the ratio of q/m f or (p) over bar and p is -0.99999999991 +/- 0.00000000009, more than 10 tim es the accuracy over our previous measurement. This 9 X 10(-11) comparison makes the first use of simultaneously trapped particles for sub-ppb spectro scopy. [S0031-9007(99)08869-9].