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Measurement of the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msubsup><mml:mrow><mml:mi>Ξ</mml:mi></mml:mrow><mml:mrow><mml:mi>c</mml:mi></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msubsup></mml:mrow></mml:math>lifetime
The ${\ensuremath{\Xi}}_{c}^{+}$ lifetime is measured using 9.0 ${\mathrm{fb}}^{\mathrm{\ensuremath{-}}1}$ of ${e}^{+}{e}^{\ensuremath{-}}$ annihilation data collected on and just below the $\ensuremath{\Upsilon}(4S)$ resonance with the CLEO II.V detector at CESR. This is the first measurement of the ${\ensuremath{\Xi}}_{c}^{+}$ lifetime from a collider experiment. Using an unbinned maximum likelihood fit, the ${\ensuremath{\Xi}}_{c}^{+}$ lifetime is …