#### (${\mathit g}_{{{\mathit e}^{+}}}–{\mathit g}_{{{\mathit e}^{-}}}$) $/$ $\mathit g_{{\mathrm {average}}}$

A test of $\mathit CPT$ invariance.
VALUE ($10^{-12}$) CL% DOCUMENT ID TECN  COMMENT
$-0.5$ $\pm2.1$ 1
 1987
MRS Penning trap
• • We do not use the following data for averages, fits, limits, etc. • •
$<12$ 95 2
 1987
CNTR Assumes ${\mathit m}_{{{\mathit e}^{+}}}$ = ${\mathit m}_{{{\mathit e}^{-}}}$
$22$ $\pm64$
 1981
MRS Penning trap
 1 VANDYCK 1987 measured ($\mathit g_{−}/\mathit g_{+})-1$ and we converted it.
 2 VASSERMAN 1987 measured ($\mathit g_{+}$ $−$ $\mathit g_{−})/({{\mathit g}}$ $−$2). We multiplied by (${{\mathit g}}$ $−2)/{{\mathit g}}$ = $1.2 \times 10^{-3}$.
Conservation Laws:
$\mathit CPT$ INVARIANCE
References:
 VANDYCK 1987
PRL 59 26 New High Precision Comparison of Electron and Positron $\mathit g$ Factors
 VASSERMAN 1987
PL B198 302 Comparison of the Electron and Positron Anomalous Magnetic Moments: Experiment 1987
 Also
PL B187 172 New Experiment on the Precise Comparison of the Anomalous Magnetic Moments of Relativistic Electrons and Positrons
 SCHWINBERG 1981
PRL 47 1679 New Comparison of the Positron and Electron $\mathit g$ Factors