${{\mathit \Xi}_{{{b}}}^{-}}$ 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   PDGID:
S069T-
VALUE ($ 10^{-12} $ s) DOCUMENT ID TECN  COMMENT
$\bf{ 1.572 \pm0.040}$ OUR EVALUATION  $~~$(Produced by HFLAV)  See the ideogram below.
$\bf{ 1.57 \pm0.05}$ OUR AVERAGE  Error includes scale factor of 1.3.  See the ideogram below.
$1.599$ $\pm0.041$ $\pm0.022$ 1
AAIJ
2014BJ
 LHCB ${{\mathit p}}{{\mathit p}}$ at 7, 8 TeV
$1.55$ ${}^{+0.10}_{-0.09}$ $\pm0.03$ 2
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. • •
$1.56$ ${}^{+0.27}_{-0.25}$ $\pm0.02$ 3
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 $1.479$ $\pm0.009$ $\pm0.010$ ps from AAIJ 2014U.
2  Measured in ${{\mathit \Xi}_{{{b}}}^{-}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit \Xi}^{-}}$ decays.
3  Measured in ${{\mathit \Xi}_{{{b}}}^{-}}$ $\rightarrow$ ${{\mathit \Xi}^{-}}$ decays with $66$ ${}^{+14}_{-9}$ candidates.

           ${{\mathit \Xi}_{{{b}}}^{-}}$ MEAN LIFE ($ 10^{-12} $ s)
References