We report a measurement of the lifetime of the Lambda(0)(b) baryon in decays to the Lambda(+)(c)pi(-) final state in a sample corresponding to 1.1 fb(-1) collected in p (p) over bar collisions at root s = 1.96 TeV by the CDF II detector at the Tevatron collider. Using a sample of about 3000 fully reconstructed Lambda(0)(b) events we measure tau(Lambda(0)(b) ) = (1.401 +/- 0.046(stat) +/- 0.035(syst)) ps (corresponding to cxtau(Lambda(0)(b)) = 420.1 +/- 13.7(stat) +/- 10.6(syst) mu m, where c is the speed of light). The ratio of this result and the world average B-0 lifetime yields tau(Lambda(0)(b))/tau(B-0) = (0.918 +/- 0.038 (stat) and (syst)), in good agreement with recent theoretical predictions.

Measurement of the Lambda(0)(b) Lifetime in Lambda(0)(b) -> Lambda(+)(c)pi(-) Decays in p(p)over-bar Collisions at root s=1.96 TeV

CIOCCI, MARIA AGNESE;DONATI, SIMONE;
2010-01-01

Abstract

We report a measurement of the lifetime of the Lambda(0)(b) baryon in decays to the Lambda(+)(c)pi(-) final state in a sample corresponding to 1.1 fb(-1) collected in p (p) over bar collisions at root s = 1.96 TeV by the CDF II detector at the Tevatron collider. Using a sample of about 3000 fully reconstructed Lambda(0)(b) events we measure tau(Lambda(0)(b) ) = (1.401 +/- 0.046(stat) +/- 0.035(syst)) ps (corresponding to cxtau(Lambda(0)(b)) = 420.1 +/- 13.7(stat) +/- 10.6(syst) mu m, where c is the speed of light). The ratio of this result and the world average B-0 lifetime yields tau(Lambda(0)(b))/tau(B-0) = (0.918 +/- 0.038 (stat) and (syst)), in good agreement with recent theoretical predictions.
2010
T., Aaltonen; J., Adelman; B. A., Gonzalez; S., Amerio; D., Amidei; A., Anastassov; A., Annovi; J., Antos; G., Apollinari; A., Apresyan; T., Arisawa; ...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/828962
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