Thousandfold improvement in the measured antiproton mass

G. Gabrielse; X. Fei; L. A. Orozco; R. L. Tjoelker; J. Haas; H. Kalinowsky; T. A. Trainor; W. Kells

doi:10.1103/PhysRevLett.65.1317

Thousandfold improvement in the measured antiproton mass

G. Gabrielse^*, X. Fei, L. A. Orozco, R. L. Tjoelker, J. Haas, H. Kalinowsky, T. A. Trainor, W. Kells

^*Corresponding author for this work

Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

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Abstract

Comparisons of antiproton and proton cyclotron frequencies yield the ratio of inertial masses M/M(p)=0.999 999 977 0.000 000 042. The fractional uncertainty of 4×10-8 is 1000 times more accurate than previous measurements of this ratio using exotic atoms and is the most precise test of CPT invariance with baryons. Independent comparisons to electrons yield the mass ratios M/M(e-)=1836.152 6600.000 083 and M(p)/M(e-) =1836.152 6800.000 088. Cryogenic antiprotons (near 4 K) stored in a Penning trap for 2 months establish directly a lifetime greater than 3.4 months.

Original language	English (US)
Pages (from-to)	1317-1320
Number of pages	4
Journal	Physical review letters
Volume	65
Issue number	11
DOIs	https://doi.org/10.1103/PhysRevLett.65.1317
State	Published - 1990

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Physics and Astronomy(all)

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title = "Thousandfold improvement in the measured antiproton mass",

abstract = "Comparisons of antiproton and proton cyclotron frequencies yield the ratio of inertial masses M/M(p)=0.999 999 977 0.000 000 042. The fractional uncertainty of 4×10-8 is 1000 times more accurate than previous measurements of this ratio using exotic atoms and is the most precise test of CPT invariance with baryons. Independent comparisons to electrons yield the mass ratios M/M(e-)=1836.152 6600.000 083 and M(p)/M(e-) =1836.152 6800.000 088. Cryogenic antiprotons (near 4 K) stored in a Penning trap for 2 months establish directly a lifetime greater than 3.4 months.",

author = "G. Gabrielse and X. Fei and Orozco, {L. A.} and Tjoelker, {R. L.} and J. Haas and H. Kalinowsky and Trainor, {T. A.} and W. Kells",

year = "1990",

doi = "10.1103/PhysRevLett.65.1317",

language = "English (US)",

volume = "65",

pages = "1317--1320",

journal = "Physical Review Letters",

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TY - JOUR

T1 - Thousandfold improvement in the measured antiproton mass

AU - Gabrielse, G.

AU - Fei, X.

AU - Orozco, L. A.

AU - Tjoelker, R. L.

AU - Haas, J.

AU - Kalinowsky, H.

AU - Trainor, T. A.

AU - Kells, W.

PY - 1990

Y1 - 1990

N2 - Comparisons of antiproton and proton cyclotron frequencies yield the ratio of inertial masses M/M(p)=0.999 999 977 0.000 000 042. The fractional uncertainty of 4×10-8 is 1000 times more accurate than previous measurements of this ratio using exotic atoms and is the most precise test of CPT invariance with baryons. Independent comparisons to electrons yield the mass ratios M/M(e-)=1836.152 6600.000 083 and M(p)/M(e-) =1836.152 6800.000 088. Cryogenic antiprotons (near 4 K) stored in a Penning trap for 2 months establish directly a lifetime greater than 3.4 months.

AB - Comparisons of antiproton and proton cyclotron frequencies yield the ratio of inertial masses M/M(p)=0.999 999 977 0.000 000 042. The fractional uncertainty of 4×10-8 is 1000 times more accurate than previous measurements of this ratio using exotic atoms and is the most precise test of CPT invariance with baryons. Independent comparisons to electrons yield the mass ratios M/M(e-)=1836.152 6600.000 083 and M(p)/M(e-) =1836.152 6800.000 088. Cryogenic antiprotons (near 4 K) stored in a Penning trap for 2 months establish directly a lifetime greater than 3.4 months.

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Thousandfold improvement in the measured antiproton mass

Abstract

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