# ${\boldsymbol m}_{{{\boldsymbol \pi}^{+}}}–{\boldsymbol m}_{{{\boldsymbol \mu}^{+}}}$ INSPIRE search

Measurements with an error $>$ $0.05$ MeV have been omitted from this Listing.
VALUE (MeV) EVTS DOCUMENT ID TECN CHG  COMMENT
• • • We do not use the following data for averages, fits, limits, etc. • • •
$33.91157$ $\pm0.00067$ 1
 1991
SPEC + ${{\mathit \pi}^{+}}$ $\rightarrow$ ${{\mathit \mu}^{+}}{{\mathit \nu}}$
$33.9111$ $\pm0.0011$
 1984
SPEC See DAUM 1991
$33.925$ $\pm0.025$
 1970
CNTR + Magnetic spect.
$33.881$ $\pm0.035$ 145
 1967
HEBC + ${{\mathit K}^{-}}{}^{}\mathrm {He}$
1  The DAUM 1991 value assumes that ${\mathit m}_{{{\mathit \nu}_{{\mu}}}}$ = 0 and uses our ${\mathit m}_{{{\mathit \mu}}}$ = $105.658389$ $\pm0.000034$ MeV.
References:
 DAUM 1991
PL B265 425 New Precision Measurement of the Muon Momentum in Pion Decay at Rest
 ABELA 1984
PL 146B 431 Precision Measurement of the Muon Momentum in Pion Decay at Rest
 BOOTH 1970
PL 32B 723 Mass of the Positive Pion
 HYMAN 1967
PL 25B 376 Mass Measurements Using the Range Energy Relation in a Helium Bubble Chamber