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

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
 SCHWINBERG 1981
PRL 47 1679 New Comparison of the Positron and Electron $\mathit g$ Factors