New determination of the fine structure constant from the electron g value and QED

被引：229
作者：
Gabrielse, G. [1 ]
Hanneke, D.
Kinoshita, T.
Nio, M.
Odom, B.
机构：
[1] Harvard Univ, Lyman Lab, Cambridge, MA 02138 USA
[2] Cornell Univ, Lab Elementary Particle Phys, Ithaca, NY 14853 USA
[3] RIKEN, Theoret Phys Lab, Wako, Saitama 3510198, Japan
来源：
PHYSICAL REVIEW LETTERS | 2006年 / 97卷 / 03期
关键词：
D O I：
10.1103/PhysRevLett.97.030802
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Quantum electrodynamics (QED) predicts a relationship between the dimensionless magnetic moment of the electron (g) and the fine structure constant (alpha). A new measurement of g using a one-electron quantum cyclotron, together with a QED calculation involving 891 eighth-order Feynman diagrams, determine alpha(-1) = 137.035 999 710 (96) [0.70 ppb]. The uncertainties are 10 times smaller than those of nearest rival methods that include atom-recoil measurements. Comparisons of measured and calculated g test QED most stringently, and set a limit on internal electron structure.
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