Measurement of the ${\Xi }_c^{+}$ lifetime

The ${\Xi }_c^{+}$ lifetime is measured using 9.0 ${\mathrm{fb}}^{\mathrm{-}1}$ of $e^{+}{e}^{-}$ annihilation data collected on and just below the ${\rm Y}\mathrm{}\left(4S\right)\mathrm{}$ resonance with the CLEO II.V detector at CESR. This is the first measurement of the ${\Xi }_c^{+}$ lifetime from a collider experiment. Using an unbinned maximum likelihood fit, the ${\Xi }_c^{+}$ lifetime is measured to be $503\pm 47\left(\mathrm{stat}\right)\pm 18\left(\mathrm{syst}\right)\mathrm{fs}.$ The precision of this measurement is comparable to previous measurements carried out by fixed target experiments with different sources of systematic uncertainties.