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${{\mathit \Lambda}_{{b}}{(5920)}^{0}}$ MASS

INSPIRE   PDGID:

B163M

VALUE (MeV) DOCUMENT ID TECN  COMMENT $\bf{ 5920.09 \pm0.17}$ OUR AVERAGE $5920.09 \pm0.02 \pm0.17$ 1 AAIJ 2020 Q LHCB ${{\mathit p}}{{\mathit p}}$ at 7, 8, 13 TeV $5920.16 \pm0.07 \pm0.17$ 2 SIRUNYAN 2020 K CMS ${{\mathit p}}{{\mathit p}}$ at 13 TeV • • We do not use the following data for averages, fits, limits, etc. • • $5919.4 \pm0.5 \pm0.2$ 3, 4 AALTONEN 2013 V CDF ${{\mathit p}}{{\overline{\mathit p}}}$ at 1.96 TeV $5920.00 \pm0.09 \pm0.17$ 5, 6 AAIJ 2012 AL LHCB Repl. by AAIJ 2020Q 1  AAIJ 2020Q measures $\mathit m({{\mathit \Lambda}_{{b}}{(5920)}^{0}}$) $−$ $\mathit m({{\mathit \Lambda}_{{b}}^{0}}$) = $300.492$ $\pm0.019$ $\pm0.010$ 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  SIRUNYAN 2020K measures $\mathit m({{\mathit \Lambda}_{{b}}{(5920)}^{0}}$) $−$ $\mathit m({{\mathit \Lambda}_{{b}}^{0}}$) = $300.56$ $\pm0.07$ $\pm0.01$ 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. 3  Measured in ${{\mathit \Lambda}_{{b}}{(5920)}^{0}}$ $\rightarrow$ ${{\mathit \Lambda}_{{b}}^{0}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ decays with $17.3$ ${}^{+5.3}_{-4.6}$ events, with a significance of 3.5 sigma. 4  AALTONEN 2013V measures $\mathit m({{\mathit \Lambda}_{{b}}{(5920)}^{0}})−\mathit m({{\mathit \Lambda}_{{b}}^{0}})−2\mathit m({{\mathit \pi}}$) = $20.68$ $\pm0.35$ $\pm0.30$ MeV. We have adjusted the measurement to our best values of $\mathit m({{\mathit \Lambda}_{{b}}^{0}}$) = $5619.60$ $\pm0.17$ (MeV) and $\mathit m({{\mathit \pi}}$) = $139.57039$ $\pm0.00018$ (MeV). Our first error is their experiment's error and our second error is the systematic error from using our best values. 5  Observed in ${{\mathit \Lambda}_{{b}}{(5920)}^{0}}$ $\rightarrow$ ${{\mathit \Lambda}_{{b}}^{0}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ decays with $52.5$ $\pm8.1$ candidates with a significance of 10.2 sigma. 6  AAIJ 2012AL measures $\mathit m({{\mathit \Lambda}_{{b}}{(5920)}^{0}}$) $−$ $\mathit m({{\mathit \Lambda}_{{b}}^{0}}$) = $300.40$ $\pm0.08$ $\pm0.04$ 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.

References:

AAIJ 2020Q JHEP 2006 136 Observation of a new baryon state in the $ {\Lambda}_{\mathrm{b}}^0{\pi}^{+}{\pi}^{-} $ mass spectrum SIRUNYAN 2020K PL B803 135345 Study of excited $\Lambda_\mathrm{b}^0$ states decaying to $\Lambda_\mathrm{b}^0\pi^+\pi^-$ in proton-proton collisions at $\sqrt{s}=$ 13 TeV AALTONEN 2013V PR D88 071101 Evidence for a Bottom Baryon Resonance ${{\mathit \Lambda}^{*}_{b}}$ in CDF Data AAIJ 2012AL PRL 109 172003 Observation of Excited ${{\mathit \Lambda}_{{b}}^{0}}$ Baryons