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

A test of $\mathit CPT$ invariance.
VALUE ($ 10^{-4} $) DOCUMENT ID TECN
$2$ $\pm5$
AYRES
1971
CNTR
  Conservation Laws:
$\mathit CPT$ INVARIANCE
  References:
AYRES 1971
PR D3 1051 Measurements of the Lifetimes of Positive and Negative Pions