#### ${{\mathit \Lambda}_{{c}}^{+}}$ MEAN LIFE

Measurements with an error ${}\geq{}$ $100 \times 10^{-15}$ s or with fewer than 20 events have been omitted from the Listings.
VALUE ($10^{-15}$ s) EVTS DOCUMENT ID TECN  COMMENT
 $\bf{ 202.4 \pm3.1}$ OUR AVERAGE  Error includes scale factor of 1.7. See the ideogram below.
$203.5$ $\pm1.7$ $\pm1.4$ 304k 1
 2019 AG
LHCB ${{\mathit \Lambda}_{{c}}^{+}}$ $\rightarrow$ ${{\mathit p}}{{\mathit K}^{-}}{{\mathit \pi}^{+}}$
$204.6$ $\pm3.4$ $\pm2.5$ 8034
 2002 C
FOCS ${{\mathit \Lambda}_{{c}}^{+}}$ $\rightarrow$ ${{\mathit p}}{{\mathit K}^{-}}{{\mathit \pi}^{+}}$
$198.1$ $\pm7.0$ $\pm5.6$ 1630
 2001
SELX ${{\mathit \Lambda}_{{c}}^{+}}$ $\rightarrow$ ${{\mathit p}}{{\mathit K}^{-}}{{\mathit \pi}^{+}}$
$179.6$ $\pm6.9$ $\pm4.4$ 4749
 2001
CLE2 ${{\mathit e}^{+}}{{\mathit e}^{-}}$ $\approx{}{{\mathit \Upsilon}{(4S)}}$
$215$ $\pm16$ $\pm8$ 1340
 1993 D
E687 ${{\mathit \gamma}}{}^{}\mathrm {Be}$, ${{\mathit \Lambda}_{{c}}^{+}}$ $\rightarrow$ ${{\mathit p}}{{\mathit K}^{-}}{{\mathit \pi}^{+}}$
• • We do not use the following data for averages, fits, limits, etc. • •
$180$ $\pm30$ $\pm30$ 29
 1990
NA14 ${{\mathit \gamma}}$, ${{\mathit \Lambda}_{{c}}^{+}}$ $\rightarrow$ ${{\mathit p}}{{\mathit K}^{-}}{{\mathit \pi}^{+}}$
$200$ $\pm30$ $\pm30$ 90
 1990
E687 ${{\mathit \gamma}}{}^{}\mathrm {Be}$, ${{\mathit \Lambda}_{{c}}^{+}}$ $\rightarrow$ ${{\mathit p}}{{\mathit K}^{-}}{{\mathit \pi}^{+}}$
$196$ ${}^{+23}_{-20}$ 101
 1989
NA32 ${{\mathit p}}{{\mathit K}^{-}}{{\mathit \pi}^{+}}$ + c.c.
$220$ $\pm30$ $\pm20$ 97
 1988 B
E691 ${{\mathit p}}{{\mathit K}^{-}}{{\mathit \pi}^{+}}$ + c.c.
 1 AAIJ 2019AG reports [${{\mathit \Lambda}_{{c}}^{+}}$ MEAN LIFE] $/$ [${{\mathit D}^{\pm}}$ MEAN LIFE] = $0.1956$ $\pm0.0010$ $\pm0.0013$ which we multiply by our best value ${{\mathit D}^{\pm}}$ MEAN LIFE = ($1.040$ $\pm0.007$) $\times 10^{-12}$ s. Our first error is their experiment's error and our second error is the systematic error from using our best value.

${{\mathit \Lambda}_{{c}}^{+}}$ mean life
References:
 AAIJ 2019AG
PR D100 032001 Precision measurement of the $\Lambda_c^+$, $\Xi_c^+$ and $\Xi_c^0$ baryon lifetimes
PRL 88 161801 A High Statistics Measurement of the ${{\mathit \Lambda}_{{c}}^{+}}$ Lifetime
 KUSHNIRENKO 2001
PRL 86 5243 Precision Measurements of the ${{\mathit \Lambda}_{{c}}^{+}}$ and ${{\mathit D}^{0}}$ Lifetimes
 MAHMOOD 2001
PRL 86 2232 Measurement of the ${{\mathit \Lambda}_{{c}}^{+}}$ Lifetime
 FRABETTI 1993D
PRL 70 1755 Measurement of the ${{\mathit \Lambda}_{{c}}^{+}}$ Lifetime
 ALVAREZ 1990
ZPHY C47 539 Lifetime Measurements of the ${{\mathit D}^{+}}$, ${{\mathit D}^{0}}$, ${{\mathit D}_{{s}}^{+}}$, and ${{\mathit \Lambda}_{{c}}^{+}}$ Charmed Particles
 FRABETTI 1990
PL B251 639 Measurement of the ${{\mathit \Lambda}_{{c}}^{+}}$ and ${{\mathit D}_{{s}}^{+}}$ Lifetimes
 BARLAG 1989
PL B218 374 Precise Determination of the Lifetime of the Charmed Baryon ${{\mathit \Lambda}_{{c}}}$
 ANJOS 1988B
PRL 60 1379 Measurements of the ${{\mathit \Lambda}_{{c}}^{+}}$ Lifetime