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${{\mathit \Xi}_{{b}}{(6227)}^{-}}$ MASS

INSPIRE   PDGID:

B180M

VALUE (MeV) DOCUMENT ID TECN  COMMENT $6227.9 \pm0.9 \pm0.2$ 1 AAIJ 2021 LHCB ${{\mathit p}}{{\mathit p}}$ at 7, 8, 13 TeV • • We do not use the following data for averages, fits, limits, etc. • • $6226.9$ $\pm2.0$ $\pm0.4$ 2, 3 AAIJ 2018 H LHCB Repl. by AAIJ 2021 1  AAIJ 2021 measures $\mathit m({{\mathit \Xi}_{{b}}{(6227)}^{-}}$) $−$ $\mathit m({{\mathit \Lambda}_{{b}}^{0}}$) = $608.3$ $\pm0.8$ $\pm0.4$ MeV. We have adjusted the measurement to our best value of $\mathit m({{\mathit \Lambda}_{{b}}^{0}}$) = $5619.60$ $\pm0.17$ (MeV). Our first error is their experiment's error and our second error is the systematic error from using our best values. 2  Uses ${{\mathit \Lambda}_{{b}}^{0}}{{\mathit K}^{-}}$ and ${{\mathit \Xi}_{{b}}^{0}}{{\mathit \pi}^{-}}$ modes. 3  Measures mass difference m(${{\mathit \Xi}_{{b}}{(6227)}^{-}}$) $−$ m(${{\mathit \Lambda}_{{b}}^{0}}$) = $607.3$ $\pm2.0$ $\pm0.3$ MeV and uses m(${{\mathit \Lambda}_{{b}}^{0}}$) = $5619.58$ $\pm0.17$ MeV.

References:

AAIJ 2021 PR D103 012004 Observation of a new $\Xi_b^0$ state AAIJ 2018H PRL 121 072002 Observation of a new $\Xi_b^-$ resonance