Precision mass spectroscopy of the anti-proton and proton using simultaneously trapped particles - INSPIRE

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Precision mass spectroscopy of the anti-proton and proton using simultaneously trapped particles

1999

4 pages

Published in:

Phys.Rev.Lett. 82 (1999) 3198-3201

DOI:

10.1103/PhysRevLett.82.3198

PDG:

{{\overline{\mathit p}}}/{{\mathit p}}

CHARGE-TO-MASS RATIO,

\vert {\mathit q_{{{\overline{\mathit p}}}}\over {\mathit m}_{{{\overline{\mathit p}}}}}\vert /({\mathit q_{{{\mathit p}}}\over {\mathit m}_{{{\mathit p}}}}

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Abstract: (APS)

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.

anti-p: mass
p: mass
anti-p: charge
p: charge
ratio: (charge mass)
oscillation: cyclotron
magnetic field
relativity theory
invariance: CPT
experimental results

References(22)

Figures(0)

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