${{\boldsymbol \Xi}_{{b}}}$ 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 http://www.slac.stanford.edu/xorg/hflav/. The averaging/rescaling procedure takes into account correlations between the measurements and asymmetric lifetime errors.

${{\boldsymbol \Xi}_{{b}}^{-}}$ MEAN LIFE INSPIRE search

VALUE ($ 10^{-12} $ s) DOCUMENT ID TECN  COMMENT
$\bf{ 1.572 \pm0.040}$ OUR EVALUATION
$\bf{ 1.57 \pm0.04}$ OUR AVERAGE  Error includes scale factor of 1.1.
$1.599$ $\pm0.041$ $\pm0.022$ 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
$1.36$ $\pm0.15$ $\pm0.02$
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.
  References:
AAIJ 2014T
PL B736 154 Measurement of the ${{\mathit \Xi}_{{b}}^{-}}$ and ${{\mathit \Omega}_{{b}}^{-}}$ Baryon Lifetimes
AAIJ 2014BJ
PRL 113 242002 Precision Measurement of the Mass and Lifetime of the ${{\mathit \Xi}_{{b}}^{-}}$ Baryon
AALTONEN 2014B
PR D89 072014 Mass and Lifetime Measurements of Bottom and Charm Baryons in ${{\mathit p}}{{\overline{\mathit p}}}$ Collisions at $\sqrt {s }$ = 1.96 TeV
AALTONEN 2009AP
PR D80 072003 Observation of the ${{\mathit \Omega}_{{b}}^{-}}$ Baryon and Measurement of the Properties of the ${{\mathit \Xi}_{{b}}^{-}}$ and ${{\mathit \Omega}_{{b}}^{-}}$ Baryons