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.

T., A., J., A., B. A., G., S., A., D., A., A., A., et al. (2010). 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. PHYSICAL REVIEW LETTERS, 104, 102002-1-102002-8 [10.1103/PhysRevLett.104.102002].

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;
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., A., J., A., B. A., G., S., A., D., A., A., A., et al. (2010). 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. PHYSICAL REVIEW LETTERS, 104, 102002-1-102002-8 [10.1103/PhysRevLett.104.102002].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/35594
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