We report a measurement of the lifetime of the Lambda0(b)
baryon in decays to the Lambda+_c pi+- final state in a sample
corresponding to 1.1 fb-1 collected in p anti-p collisions at s**(1/2)
ñ.96 TeV by the CDF II detector at the Tevatron collider. Using a
sample of about 3000 fully reconstructed Lambda0(b) events we measure
tau(Lambda0(b)) ñ.401 +/- 0.046 (stat) +/- 0.035 (syst) ps (corresponding
to c tau(Lambda0(b)) ô20.1 +/- 13.7 (stat) +/- 10.6 (syst) mu m, where c
is the speed of light). The ratio of this result and the world average
B0 lifetime yields tau (Lambda0(b))/tau(B0) ð.918 +/- 0.038 (stat and
syst), in good agreement with recent theoretical predictions.
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Updated: Thursday, 2010 March 18 11:43:45 CDT automatically from input from carol picciolo