Measurement of the Xi+c Lifetime

الأصل · EN

The Xi+c lifetime is measured using 9.0 fb-1 of e+e- annihilation data collected on and just below the Upsilon(4S) 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 +/- 47 (stat.) +/- 18 (syst.) fs. The precision of this measurement is comparable to previous measurements carried out by fixed target experiments with different sources of systematic uncertainties.