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${{\mathit \Omega}_{{b}}}$ MEAN LIFE

INSPIRE   PDGID:

S063T

"OUR EVALUATION" has been provided by the Heavy Flavor Averaging Group (HFLAV, https://hflav.web.cern.ch/).

VALUE ($ 10^{-12} $ s) DOCUMENT ID TECN  COMMENT $\bf{ 1.64 {}^{+0.18}_{-0.17}}$ OUR EVALUATION $\bf{ 1.65 {}^{+0.18}_{-0.16}}$ OUR AVERAGE $1.78$ $\pm0.26$ $\pm0.05$ $\pm0.06$ 1 AAIJ 2016 O LHCB ${{\mathit p}}{{\mathit p}}$ at 7, 8 TeV $1.54$ ${}^{+0.26}_{-0.21}$ $\pm0.05$ 2 AAIJ 2014 T LHCB ${{\mathit p}}{{\mathit p}}$ at 7, 8 TeV $1.66$ ${}^{+0.53}_{-0.40}$ $\pm0.02$ 2 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. • • $1.13$ ${}^{+0.53}_{-0.40}$ $\pm0.02$ 3 AALTONEN 2009 AP CDF Repl. by AALTONEN 2014B 1  Measured in ${{\mathit \Omega}_{{b}}^{-}}$ $\rightarrow$ ${{\mathit \Omega}_{{c}}^{0}}{{\mathit \pi}^{-}}$ , ${{\mathit \Omega}_{{c}}^{0}}$ $\rightarrow$ ${{\mathit p}}{{\mathit K}^{-}}{{\mathit K}^{-}}{{\mathit \pi}^{+}}$ decays relative to ${{\mathit \Xi}_{{b}}^{-}}$ $\rightarrow$ ${{\mathit \Xi}_{{c}}^{0}}{{\mathit \pi}^{-}}$ , ${{\mathit \Xi}_{{c}}^{0}}$ $\rightarrow$ ${{\mathit p}}{{\mathit K}^{-}}{{\mathit K}^{-}}{{\mathit \pi}^{+}}$ decays with reference ${{\mathit \Xi}_{{b}}^{-}}$ mean life $1.599$ $\pm0.06$ ps from AAIJ 2014B. 2  Measured in ${{\mathit \Omega}_{{b}}^{-}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit \Omega}^{-}}$ decays. 3  Observed in ${{\mathit \Omega}_{{b}}^{-}}$ $\rightarrow$ ${{\mathit \Omega}^{-}}$ decays with $16$ ${}^{+6}_{-4}$ candidates, a significance of 5.5 sigma from a combined mass-lifetime fit.

References:

AAIJ 2016O PR D93 092007 Measurement of the Mass and Lifetime of the ${{\mathit \Omega}_{{b}}^{-}}$ Baryon AAIJ 2014T PL B736 154 Measurement of the ${{\mathit \Xi}_{{b}}^{-}}$ and ${{\mathit \Omega}_{{b}}^{-}}$ Baryon Lifetimes 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