$({\boldsymbol \tau}_{{{\boldsymbol \tau}^{+}}}–{\boldsymbol \tau}_{{{\boldsymbol \tau}^{-}}})/{\boldsymbol \tau}_{\mathrm {average}}$ INSPIRE search

Test of $\mathit CPT$ invariance.
VALUE CL% DOCUMENT ID TECN  COMMENT
$\bf{<7.0 \times 10^{-3}}$ 90 1
BELOUS
2014
BELL 711 fb${}^{-1}{\it{}E}^{\it{}ee}_{\rm{}cm}$ = 10.6 GeV
1  BELOUS 2014 quote limit on the absolute value of the relative lifetime difference.
  References:
BELOUS 2014
PRL 112 031801 Measurement of the ${{\mathit \tau}}$-lepton Lifetime at Belle