pdgLive Home   >   CHARMED BARYONS ($\mathit C$ = $+1$)   >   ${{\mathit \Lambda}_{{{c}}}^{+}}$   >   ${{\mathit \Lambda}_{{{c}}}^{+}}$ MEAN LIFE

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

INSPIRE   PDGID:

S033T

Measurements with an error ${}\geq{}$ $100 \times 10^{-15}$ s or with fewer than 20 events have been omitted from the Listings.

VALUE ($ 10^{-15} $ s) EVTS DOCUMENT ID TECN  COMMENT $\bf{ 202.6 \pm1.0}$ OUR AVERAGE $203.20$ $\pm0.89$ $\pm0.77$ 107k ABUDINEN 2023 A BEL2 ${{\mathit \Lambda}_{{{c}}}^{+}}$ $\rightarrow$ ${{\mathit p}}{{\mathit K}^{-}}{{\mathit \pi}^{+}}$, ${{\mathit e}^{+}}{{\mathit e}^{-}}$ near ${{\mathit \Upsilon}{(4S)}}$ $202.1$ $\pm1.7$ $\pm0.9$ 304k 1 AAIJ 2019 AG LHCB ${{\mathit \Lambda}_{{{c}}}^{+}}$ $\rightarrow$ ${{\mathit p}}{{\mathit K}^{-}}{{\mathit \pi}^{+}}$ $204.6$ $\pm3.4$ $\pm2.5$ 8034 LINK 2002 C FOCS ${{\mathit \Lambda}_{{{c}}}^{+}}$ $\rightarrow$ ${{\mathit p}}{{\mathit K}^{-}}{{\mathit \pi}^{+}}$ $198.1$ $\pm7.0$ $\pm5.6$ 1630 KUSHNIRENKO 2001 SELX ${{\mathit \Lambda}_{{{c}}}^{+}}$ $\rightarrow$ ${{\mathit p}}{{\mathit K}^{-}}{{\mathit \pi}^{+}}$ $179.6$ $\pm6.9$ $\pm4.4$ 4749 MAHMOOD 2001 CLE2 ${{\mathit e}^{+}}{{\mathit e}^{-}}$ $\approx{}{{\mathit \Upsilon}{(4S)}}$ $215$ $\pm16$ $\pm8$ 1340 FRABETTI 1993 D E687 ${{\mathit \gamma}}{}^{}\mathrm {Be}$, ${{\mathit \Lambda}_{{{c}}}^{+}}$ $\rightarrow$ ${{\mathit p}}{{\mathit K}^{-}}{{\mathit \pi}^{+}}$ • • We do not use the following data for averages, fits, limits, etc. • • $180$ $\pm30$ $\pm30$ 29 ALVAREZ 1990 NA14 ${{\mathit \gamma}}$, ${{\mathit \Lambda}_{{{c}}}^{+}}$ $\rightarrow$ ${{\mathit p}}{{\mathit K}^{-}}{{\mathit \pi}^{+}}$ $200$ $\pm30$ $\pm30$ 90 FRABETTI 1990 E687 ${{\mathit \gamma}}{}^{}\mathrm {Be}$, ${{\mathit \Lambda}_{{{c}}}^{+}}$ $\rightarrow$ ${{\mathit p}}{{\mathit K}^{-}}{{\mathit \pi}^{+}}$ $196$ ${}^{+23}_{-20}$ 101 BARLAG 1989 NA32 ${{\mathit p}}{{\mathit K}^{-}}{{\mathit \pi}^{+}}$ + c.c. $220$ $\pm30$ $\pm20$ 97 ANJOS 1988 B E691 ${{\mathit p}}{{\mathit K}^{-}}{{\mathit \pi}^{+}}$ + c.c. 1  AAIJ 2019AG reports [${{\mathit \Lambda}_{{{c}}}^{+}}$ MEAN LIFE] $/$ [${{\mathit D}^{\pm}}$ MEAN LIFE] = $0.1956$ $\pm0.0010$ $\pm0.0013$ 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.

References