${{\mathit \Omega}_{{{c}}}^{0}}$ MEAN LIFE

INSPIRE   PDGID:
S047T
VALUE ($ 10^{-15} $ s) EVTS DOCUMENT ID TECN  COMMENT
$\bf{ 273 \pm12}$ OUR AVERAGE
$243$ $\pm48$ $\pm11$ 88
ABUDINEN
2023
BEL2 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Omega}_{{{c}}}^{0}}{+}$ ${{\mathit X}}$, ${{\mathit \Omega}_{{{c}}}^{0}}$ $\rightarrow$ ${{\mathit \Omega}^{-}}{{\mathit \pi}^{+}}$
$276.5$ $\pm13.4$ $\pm4.5$ 1, 2
AAIJ
2022Y
LHCB ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \Omega}_{{{c}}}}{{\mathit X}}$, ${{\mathit \Omega}_{{{c}}}}$ $\rightarrow$ ${{\mathit p}}{{\mathit K}^{-}}{{\mathit K}^{-}}{{\mathit \pi}^{+}}$
$268$ $\pm24$ $\pm10$ 978 1, 3
AAIJ
2018J
LHCB ${{\mathit \Omega}_{{{b}}}}$ $\rightarrow$ ${{\mathit \Omega}_{{{c}}}}{{\mathit \mu}}{{\mathit \nu}}{+}$ ${{\mathit X}}$, ${{\mathit \Omega}_{{{c}}}}$ $\rightarrow$ ${{\mathit p}}{{\mathit K}^{-}}{{\mathit K}^{-}}{{\mathit \pi}^{+}}$
• • We do not use the following data for averages, fits, limits, etc. • •
$72$ $\pm11$ $\pm11$ 64
LINK
2003C
FOCS ${{\mathit \Omega}^{-}}{{\mathit \pi}^{+}}$, ${{\mathit \Xi}^{-}}{{\mathit K}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{+}}$
$55$ ${}^{+13}_{-11}$ ${}^{+18}_{-23}$ 86
ADAMOVICH
1995B
WA89 ${{\mathit \Omega}^{-}}{{\mathit \pi}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{+}}$, ${{\mathit \Xi}^{-}}{{\mathit K}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{+}}$
$86$ ${}^{+27}_{-20}$ $\pm28$ 25
FRABETTI
1995D
E687 ${{\mathit \Sigma}^{+}}{{\mathit K}^{-}}{{\mathit K}^{-}}{{\mathit \pi}^{+}}$
1  Recent measurements by AAIJ 2018J, AAIJ 2022Y, and ABUDINEN 2023 obtain consistent results that are nearly four times larger than the average result of previous experiments, ($69$ $\pm12$) $ \times 10^{-15}$ s. We go with the more recent results, mostly obtained with much larger data samples, and also note the positive correlation between the measured value and the inverse of the estimated statistical uncertainty in lifetime measurements.
2  AAIJ 2022Y reports this measurement as ($276.5$ $\pm13.4$ $\pm4.4$ $\pm0.7$) $ \times 10^{-15}$ s. The last uncertainty is due to the uncertainty on the ${{\mathit D}^{0}}$ lifetime ${\mathit \tau}_{{{\mathit D}^{0}}}$ = ($410.1$ $\pm1.5$) fs from PDG 2020. Measured in ${{\mathit \Omega}_{{{c}}}}$ produced promptly in ${{\mathit p}}{{\mathit p}}$ collisions, using ${{\mathit D}^{0}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ as normalisation mode.
3  Measured using ${{\mathit \Omega}_{{{c}}}}$ produced in semileptonic ${{\mathit \Omega}_{{{b}}}}$ decays.
References