THOUSANDFOLD IMPROVEMENT IN THE MEASURED ANTIPROTON MASS

被引：262

作者：

GABRIELSE, G

FEI, X

OROZCO, LA

TJOELKER, RL

HAAS, J

KALINOWSKY, H

TRAINOR, TA

KELLS, W

机构：

[1] UNIV MAINZ,INST PHYS,W-6500 MAINZ,GERMANY

[2] UNIV WASHINGTON,DEPT PHYS,SEATTLE,WA 98195

[3] INST BOSON STUDIES,PASADENA,CA 91107

来源：

PHYSICAL REVIEW LETTERS | 1990年 / 65卷 / 11期

关键词：

D O I：

10.1103/PhysRevLett.65.1317

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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. © 1990 The American Physical Society.

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页码：1317 / 1320

页数：4

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