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${{\mathit \Xi}_{{b}}}$ 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:

S060T-

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 2014 BJ LHCB ${{\mathit p}}{{\mathit p}}$ at 7, 8 TeV $1.55$ ${}^{+0.10}_{-0.09}$ $\pm0.03$ 2 AAIJ 2014 T LHCB ${{\mathit p}}{{\mathit p}}$ at 7, 8 TeV $1.36$ $\pm0.15$ $\pm0.02$ AALTONEN 2014 B 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 2009 AP 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

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