${{\mathit K}^{\pm}}$ MEAN LIFE

INSPIRE   PDGID:
S010T
VALUE ($ 10^{-8} $ s) EVTS DOCUMENT ID TECN CHG  COMMENT
$\bf{ 1.2380 \pm0.0020}$ OUR FIT  Error includes scale factor of 1.8.
$\bf{ 1.2379 \pm0.0021}$ OUR AVERAGE  Error includes scale factor of 1.9.  See the ideogram below.
$1.2347$ $\pm0.0030$ 15M 1
AMBROSINO
2008
KLOE $\pm{}$ ${{\mathit \phi}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}$
$1.2451$ $\pm0.0030$ 250k
KOPTEV
1995
CNTR ${{\mathit K}}$ at rest, U target
$1.2368$ $\pm0.0041$ 150k
KOPTEV
1995
CNTR ${{\mathit K}}$ at rest, Cu target
$1.2380$ $\pm0.0016$ 3M
OTT
1971
CNTR + ${{\mathit K}}$ at rest
$1.2272$ $\pm0.0036$
LOBKOWICZ
1969
CNTR + ${{\mathit K}}$ in flight
$1.2443$ $\pm0.0038$
FITCH
1965B
CNTR + ${{\mathit K}}$ at rest
• • We do not use the following data for averages, fits, limits, etc. • •
$1.2415$ $\pm0.0024$ 400k 2
KOPTEV
1995
CNTR ${{\mathit K}}$ at rest
$1.221$ $\pm0.011$
FORD
1967
CNTR $\pm{}$
$1.231$ $\pm0.011$
BOYARSKI
1962
CNTR +
1  Result obtained by averaging the decay length and decay time analyses taking correlations into account.
2  KOPTEV 1995 report this weighted average of their U-target and Cu-target results, where they have weighted by 1/$\sigma $ rather than 1/$\sigma {}^{2}$.

           ${{\mathit K}^{\pm}}$ mean life (${10^{-8}}$s)
References
see fit info