${{\mathit \Xi}_{{{b}}}^{-}}$ MEAN LIFE

``OUR EVALUATION'' is an average using rescaled values of the data listed below. The average and rescaling were performed by the Heavy Flavor Averaging Group (HFLAV) and are described at https://hflav.web.cern.ch/. The averaging/rescaling procedure takes into account correlations between the measurements and asymmetric lifetime errors.

${{\mathit \Xi}_{{{b}}}^{-}}$ MEAN LIFE

INSPIRE   JSON  (beta) PDGID:
S069T-
VALUE ($ 10^{-12} $ s) DOCUMENT ID TECN  COMMENT
$\bf{ 1.578 \pm0.021}$ OUR EVALUATION  $~~$(Produced by HFLAV)
$\bf{ 1.570 \pm0.023}$ OUR AVERAGE
$1.578$ $\pm0.018$ $\pm0.015$ 1, 2
AAIJ
2024AJ
 LHCB ${{\mathit p}}{{\mathit p}}$ at 7, 8, 13 TeV
$1.55$ ${}^{+0.10}_{-0.09}$ $\pm0.03$ 3
AAIJ
2014T
 LHCB ${{\mathit p}}{{\mathit p}}$ at 7, 8 TeV
$1.32$ $\pm0.14$ $\pm0.02$
AALTONEN
2014B
 CDF ${{\mathit p}}{{\overline{\mathit p}}}$ at 1.96 TeV
• • We do not use the following data for averages, fits, limits, etc. • •
$1.575$ $\pm0.019$ $\pm0.014$ 1
AAIJ
2024AJ
 LHCB ${{\mathit p}}{{\mathit p}}$ at 13 TeV
$1.599$ $\pm0.041$ $\pm0.022$ 4
AAIJ
2014BJ
 LHCB ${{\mathit p}}{{\mathit p}}$ at 7, 8 TeV
$1.56$ ${}^{+0.27}_{-0.25}$ $\pm0.02$ 5
AALTONEN
2009AP
 CDF Repl. by AALTONEN 2014B
1  Reconstructed in ${{\mathit \Xi}_{{{b}}}^{-}}$ $\rightarrow$ ${{\mathit \Xi}_{{{c}}}^{0}}{{\mathit \pi}^{-}}$, ${{\mathit \Xi}_{{{c}}}^{0}}$ $\rightarrow$ ${{\mathit p}}{{\mathit K}^{-}}{{\mathit K}^{-}}{{\mathit \pi}^{+}}$ decays. Reference ${{\mathit \Lambda}_{{{b}}}^{0}}$ lifetime $1.464$ $\pm0.010$ ps from PDG 2022.
2  Supersedes AAIJ 2014BJ and AAIJ 2024AJ.
3  Measured in ${{\mathit \Xi}_{{{b}}}^{-}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit \Xi}^{-}}$ decays.
4  Reconstructed in ${{\mathit \Xi}_{{{b}}}^{-}}$ $\rightarrow$ ${{\mathit \Xi}_{{{c}}}^{0}}{{\mathit \pi}^{-}}$, ${{\mathit \Xi}_{{{c}}}^{0}}$ $\rightarrow$ ${{\mathit p}}{{\mathit K}^{-}}{{\mathit K}^{-}}{{\mathit \pi}^{+}}$ decays. Reference ${{\mathit \Lambda}_{{{b}}}^{0}}$ lifetime $1.479$ $\pm0.009$ $\pm0.010$ ps from AAIJ 2014U.
5  Measured in ${{\mathit \Xi}_{{{b}}}^{-}}$ $\rightarrow$ ${{\mathit \Xi}^{-}}$ decays with $66$ ${}^{+14}_{-9}$ candidates.
References