Abstract:
We report a measurement of the Lambdab0 lifetime in the exclusive decay Lambdab0-->J/psiLambda0 in p[overline p] collisions at sqrt(s)=1.96 TeV using an integrated luminosity of 1.0 fb-1 of data collected by the CDF II detector at the Fermilab Tevatron. Using fully reconstructed decays, we measure tau(Lambdab0)=1.593-0.078+0.083(stat)$\pm$0.033(syst) ps. This is the single most precise measurement of tau(Lambdab0) and is 3.2sigma higher than the current world average.