${{\mathit \mu}}$ MEAN LIFE $\tau $

INSPIRE   PDGID:
S004T
Measurements with an error $>$ $0.001 \times 10^{-6}~$s have been omitted.
VALUE ($ 10^{-6} $ s) DOCUMENT ID TECN CHG  COMMENT
$\bf{ 2.1969811 \pm0.0000022}$ OUR AVERAGE
$2.1969803$ $\pm0.0000021$ $\pm0.0000007$ 1
TISHCHENKO
2013
CNTR + Surface ${{\mathit \mu}^{+}}$ at PSI
$2.197083$ $\pm0.000032$ $\pm0.000015$
BARCZYK
2008
CNTR + Muons from ${{\mathit \pi}^{+}}$ decay at rest
$2.197013$ $\pm0.000021$ $\pm0.000011$
CHITWOOD
2007
CNTR + Surface ${{\mathit \mu}^{+}}$ at PSI
$2.197078$ $\pm0.000073$
BARDIN
1984
CNTR +
$2.197025$ $\pm0.000155$
BARDIN
1984
CNTR -
$2.19695$ $\pm0.00006$
GIOVANETTI
1984
CNTR +
$2.19711$ $\pm0.00008$
BALANDIN
1974
CNTR +
$2.1973$ $\pm0.0003$
DUCLOS
1973
CNTR +
• • We do not use the following data for averages, fits, limits, etc. • •
$2.1969803$ $\pm0.0000022$
WEBBER
2011
CNTR + Surface ${{\mathit \mu}^{+}}$ at PSI
1  TISHCHENKO 2013 uses $1.6 \times 10^{12}{{\mathit \mu}^{+}}$ events and supersedes WEBBER 2011.
References