${{\mathit e}}$ MAGNETIC MOMENT ANOMALY

${{\mathit \mu}_{{{e}}}}/{{\mathit \mu}_{{{B}}}}$ $−$ 1 = ($\mathit g−$2)/2 INSPIRE search

S003MM
VALUE ($ 10^{-6} $) DOCUMENT ID TECN CHG  COMMENT
$\bf{ 1159.65218062 \pm0.00000012}$ OUR AVERAGE
$1159.65218059$ $\pm0.00000013$ 1
FAN
2023
MRS Single electron
$1159.65218073$ $\pm0.00000028$
HANNEKE
2008
MRS Single electron
$1159.6521884$ $\pm0.0000043$
VANDYCK
1987
MRS - Single electron
• • • We do not use the following data for averages, fits, limits, etc. • • •
$1159.65218046$ $\pm0.00000018$
MOHR
2025
RVUE 2022 CODATA value
$1159.65218128$ $\pm0.00000018$
TIESINGA
2021
RVUE 2018 CODATA value
$1159.65218091$ $\pm0.00000026$
MOHR
2016
RVUE 2014 CODATA value
$1159.65218076$ $\pm0.00000027$
MOHR
2012
RVUE 2010 CODATA value
$1159.65218111$ $\pm0.00000074$ 2
MOHR
2008
RVUE 2006 CODATA value
$1159.65218085$ $\pm0.00000076$ 3
ODOM
2006
MRS - Single electron
$1159.6521859$ $\pm0.0000038$
MOHR
2005
RVUE 2002 CODATA value
$1159.6521869$ $\pm0.0000041$
MOHR
1999
RVUE 1998 CODATA value
$1159.652193$ $\pm0.000010$
COHEN
1987
RVUE 1986 CODATA value
$1159.6521879$ $\pm0.0000043$ 4
VANDYCK
1987
MRS + Single positron
1  FAN 2023 report the most accurate measurement of the electron magnetic moment. A one-electron quantum cyclotron is used. We do not propagate at the moment this measurement to the fine structure and other physical constants. When discrepancies in the independent determinations of alpha are resolved, the new measurement uncertainty of 0.13 ppt is available for precise tests for BSM physics.
2  MOHR 2008 average is dominated by ODOM 2006.
3  Superseded by HANNEKE 2008 per private communication with Gerald Gabrielse.
4  This VANDYCK 1987 reault is for a positron. We do not take it into account for the average to avoid the assumption of CPT invariance.
  References:
MOHR 2025
RMP 97 025002 CODATA Recommended Values of the Fundamental Physical Constants: 2022
FAN 2023
PRL 130 071801 Measurement of the Electron Magnetic Moment
TIESINGA 2021
RMP 93 025010 CODATA recommended values of the fundamental physical constants: 2018
MOHR 2016
RMP 88 035009 CODATA Recommended Values of the Fundamental Physical Constants: 2014
MOHR 2012
RMP 84 1527 CODATA Recommended Values of the Fundamental Physical Constants: 2010
HANNEKE 2008
PRL 100 120801 New Measurement of the Electron Magnetic Moment and the Fine Structure Constant
MOHR 2008
RMP 80 633 CODATA Recomended Values of the Fundamental Physical Constants: 2006
ODOM 2006
PRL 97 030801 New Measurement of the Electron Magnetic Moment Using a One-Electron Quantum Cyclotron
MOHR 2005
RMP 77 1 NIST Constants
MOHR 1999
JPCRD 28 1713 CODATA Recommended Values of the Fundamental Physical Constants: 1998;
Also
RMP 72 351 CODATA Recommended Values of the Fundamental Physical Constants: 1998
COHEN 1987
RMP 59 1121 CODATA Fundamental Physical Constants 1986 Adjustments
VANDYCK 1987
PRL 59 26 New High Precision Comparison of Electron and Positron $\mathit g$ Factors