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${{\mathit \Xi}_{{{c}}}^{+}}$ MEAN LIFE

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VALUE ($ 10^{-15} $ s) EVTS DOCUMENT ID TECN  COMMENT $\bf{ 453 \pm5}$ OUR AVERAGE $454$ $\pm5$ $\pm2$ 56k 1 AAIJ 01 AG   LHCB ${{\mathit \Xi}_{{{c}}}^{+}}$ $\rightarrow$ ${{\mathit p}}{{\mathit K}^{-}}{{\mathit \pi}^{+}}$ $503$ $\pm47$ $\pm18$ 250 MAHMOOD 00   CLE2 ${{\mathit e}^{+}}{{\mathit e}^{-}}$ $\approx{}{{\mathit \Upsilon}{(4S)}}$ $439$ $\pm22$ $\pm9$ 532 LINK 00 D   FOCS ${{\mathit \gamma}}$ nucleus, ${{\overline{\mathit E}}}_{\gamma }$ $\approx{}$ 180 GeV $340$ ${}^{+70}_{-50}$ $\pm20$ 56 FRABETTI 99   E687 ${{\mathit \gamma}}{}^{}\mathrm {Be}$, ${{\overline{\mathit E}}}_{\gamma }$= $220$ GeV $400$ ${}^{+180}_{-120}$ $\pm100$ 102 COTEUS 98   SPEC ${{\mathit n}}{}^{}\mathrm {A}$ $\simeq{}$ 600 GeV $480$ ${}^{+210}_{-150}$ ${}^{+200}_{-100}$ 53 BIAGI 98 C   SPEC ${{\mathit \Sigma}^{-}}{}^{}\mathrm {Be}$ 135 GeV • • We do not use the following data for averages, fits, limits, etc. • • $410$ ${}^{+110}_{-80}$ $\pm20$ 30 FRABETTI 99 B   E687 See FRABETTI 1998 $200$ ${}^{+110}_{-60}$ 6 BARLAG 98 C   ACCM ${{\mathit \pi}^{-}}$ (${{\mathit K}^{-}}$) ${}^{}\mathrm {Cu}$ 230 GeV 1  AAIJ 2019AG reports [${{\mathit \Xi}_{{{c}}}^{+}}$ MEAN LIFE] $/$ [${{\mathit D}^{\pm}}$ MEAN LIFE] = $0.4392$ $\pm0.0034$ $\pm0.0028$ which we multiply by our best value ${{\mathit D}^{\pm}}$ MEAN LIFE = ($1.033$ $\pm0.005$) $ \times 10^{-12}$ s. Our first error is their experiment's error and our second error is the systematic error from using our best value.

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