Measurement of the Λb0 Lifetime in Λb0→J/ψΛ0 in pp¯ Collisions at s=1.96 TeV
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We report a measurement of the Λb0 lifetime in the exclusive decay Λb0→J/ψΛ0 in pp̄ collisions at s=1.96TeV using an integrated luminosity of 1.0fb-1 of data collected by the CDF II detector at the Fermilab Tevatron. Using fully reconstructed decays, we measure τ(Λb0)=1.593-0.078+0.083(stat)±0.033(syst)ps. This is the single most precise measurement of τ(Λb0) and is 3.2σ higher than the current world average. © 2007 The American Physical Society.
author list (cited authors)
Abulencia, A., Adelman, J., Affolder, T., Akimoto, T., Albrow, M. G., Ambrose, D., ... Zucchelli, S.