# ${{\boldsymbol \mu}}$ ELECTRIC DIPOLE MOMENT (d) INSPIRE search

A nonzero value is forbidden by both $\mathit T$ invariance and $\mathit P$ invariance.
VALUE ($10^{-19}$ $\mathit e~$cm) DOCUMENT ID TECN CHG  COMMENT
$-0.1$ $\pm0.9$ 1
 2009
MUG2 +- Storage ring
• • • We do not use the following data for averages, fits, limits, etc. • • •
$-0.1$ $\pm1.0$
 2009
MUG2 + Storage ring
$-0.1$ $\pm0.7$
 2009
MUG2 - Storage ring
$-3.7$ $\pm3.4$ 2
 1978
CNTR +- Storage ring
$8.6$ $\pm4.5$
 1978
CNTR + Storage ring
$0.8$ $\pm4.3$
 1978
CNTR - Storage ring
1  This is the combination of the two BENNETT 2009 results quoted here separately for ${{\mathit \mu}^{+}}$ and ${{\mathit \mu}^{-}}$. BENNETT 2009 uses the convention d = 1/2 $\cdot{}$ (d$_{{{\mathit \mu}^{-}}}−$ d$_{{{\mathit \mu}^{+}}}$).
2  This is the combination of the two BAILEY 1978 results quoted here separately for ${{\mathit \mu}^{+}}$ and ${{\mathit \mu}^{-}}$. BAILEY 1978 uses the convention d = 1/2 $\cdot{}$ (d$_{{{\mathit \mu}^{+}}}−$ d$_{{{\mathit \mu}^{-}}}$) and reports $3.7$ $\pm3.4$. We convert their result to use the same convention as BENNETT 2009 .
Conservation Laws:
 TIME REVERSAL ($\mathit T$) INVARIANCE , PARITY ($\mathit P$) INVARIANCE
References:
 BENNETT 2009
PR D80 052008 Improved Limit on the Muon Electric Dipole Moment
 BAILEY 1978
JP G4 345 New Limits on the Electric Dipole Moment of Positive and Negative Muons