# $\vert{}{\boldsymbol m}_{{{\boldsymbol K}^{0}}}–{\boldsymbol m}_{{{\overline{\boldsymbol K}}^{0}}}\vert{}/{\boldsymbol m}_{\mathrm {average}}$ INSPIRE search

A test of $\mathit CPT$ invariance. Our Evaluation'' is described in the Tests of Conservation Laws'' section. It assumes $\mathit CPT$ invariance in the decay and neglects some contributions from decay channels other than ${{\mathit \pi}}{{\mathit \pi}}$ .
VALUE CL% DOCUMENT ID TECN
$\bf{<6 \times 10^{-19}}$ 90
 2012
• • • We do not use the following data for averages, fits, limits, etc. • • •
$(-3 \pm4) \times 10^{-18}$ 1
 1999 B
RVUE
1  ANGELOPOULOS 1999B assumes only unitarity and combines CPLEAR and other results.
Conservation Laws:
 $\mathit CPT$ INVARIANCE
References:
 PDG 2012
PR D86 010001 PDG 2012
 ANGELOPOULOS 1999B
PL B471 332 ${{\overline{\mathit K}}^{0}}$ $−$ ${{\mathit K}^{0}}$ Mass and Decay Width Differences: CPLEAR Evaluation