Measurement of the ${\mathrm{\Lambda }}_c^{+}$ lifetime

An absolute measurement of the ${\mathrm{\Lambda }}_c^{+}$ lifetime is reported using ${\mathrm{\Lambda }}_c^{+}\to p{K}^{-}{\pi }^{+}$ decays in events reconstructed from data collected by the Belle II experiment at the SuperKEKB asymmetric-energy electron-positron collider. The total integrated luminosity of the data sample, which was collected at center-of-mass energies at or near the $\mathrm{{\rm Y}}(4S)$ resonance, is $207.2f{b}^{-1}$. The result, $\tau ({\mathrm{\Lambda }}_c^{+})=203.20\pm 0.89(\mathrm{s}\mathrm{t}\mathrm{a}\mathrm{t})\pm 0.77(\mathrm{s}\mathrm{y}\mathrm{s}\mathrm{t})$ fs, is the most precise measurement to date and is consistent with previous determinations.