#### ${\mathit m}_{{{\mathit W}^{+}}}–{\mathit m}_{{{\mathit W}^{-}}}$

Test of $\mathit CPT$ invariance.
VALUE (GeV) EVTS DOCUMENT ID TECN  COMMENT
 $\bf{ -0.029 \pm0.028}$ OUR AVERAGE
$-0.029$ $\pm0.013$ $\pm0.025$ 13.7M 1
 2018 J
ATLS ${\it{}E}^{\it{}pp}_{\rm{}cm}$ = 7 TeV
$-0.19$ $\pm0.58$ 1722
 1990 G
CDF ${\it{}E}^{\it{}p\overline{\it{}p}}_{\rm{}cm}$= $1.8$ TeV
 1 AABOUD 2018J select 4.61M ${{\mathit W}^{+}}$ $\rightarrow$ ${{\mathit \mu}^{+}}{{\mathit \nu}_{{\mu}}}$ , 3.40M ${{\mathit W}^{+}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit \nu}_{{e}}}$ , 3.23M ${{\mathit W}^{-}}$ $\rightarrow$ ${{\mathit \mu}^{-}}{{\overline{\mathit \nu}}_{{\mu}}}$ and 2.49M ${{\mathit W}^{-}}$ $\rightarrow$ ${{\mathit e}^{-}}{{\overline{\mathit \nu}}_{{e}}}$ events in 4.6 fb${}^{-1}$ ${{\mathit p}}{{\mathit p}}$ data at 7 TeV. The ${{\mathit W}}$ mass is determined using the transverse mass and transverse lepton momentum distributions, accounting for correlations. The systematic error includes 0.007 GeV experimental and 0.024 GeV modelling uncertainties.
References:
 AABOUD 2018J
EPJ C78 110 Measurement of the ${{\mathit W}}$ -boson Mass in ${{\mathit p}}{{\mathit p}}$ Collisions at $\sqrt {s }$ = 7 TeV with the ATLAS Detector
 Also
EPJ C78 898 (errat.) Measurement of the $W$-boson mass in pp collisions at $\sqrt{s}=7$ TeV with the ATLAS detector
 ABE 1990G
PRL 65 2243 A Measurement of the ${{\mathit W}}$ Boson Mass
 Also
PR D43 2070 A Measurement of the ${{\mathit W}}$ Boson Mass in 1.8 TeV ${{\overline{\mathit p}}}$ ${{\mathit p}}$ Collisions