${{\mathit \mu}}$ DECAY PARAMETERS

${{\overline{\mathit \eta}}}$ PARAMETER

INSPIRE   PDGID:
S004ETB
($\mathit V−\mathit A$) theory predicts ${{\overline{\mathit \eta}}}$ = 0. ${{\overline{\mathit \eta}}}$ affects spectrum of radiative muon decay.
VALUE DOCUMENT ID TECN CHG  COMMENT
$\bf{ 0.02 \pm0.08}$ OUR AVERAGE
$-0.014$ $\pm0.090$
EICHENBERGER
1984
ELEC + ${{\mathit \rho}}$ free
$+0.09$ $\pm0.14$
BOGART
1967
CNTR +
• • We do not use the following data for averages, fits, limits, etc. • •
$-0.035$ $\pm0.098$
EICHENBERGER
1984
ELEC + $\rho =0.75$ assumed
References