Measurement of the Λb0 Lifetime in Λb0→J/ψΛ0 in pp? Collisions at s=1.96TeV
Journal
Physical Review Letters
Journal Volume
98
Journal Issue
12
Date Issued
2007
Author(s)
Abulencia, A. et al. (CDF Collaboration)
Abstract
We report a measurement of the Lambda b0 lifetime in the exclusive decay Lambda b0-->J/psi Lambda 0 in pp collisions at square root 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(Lambda b0)=1.593(-0.078)(+0.083)(stat)+/-0.033(syst) ps. This is the single most precise measurement of tau(Lambda b0) and is 3.2sigma higher than the current world average.
Type
journal article