In 451 000 hadronic Z0 decays, recorded with the ALEPH detector at LEP, the yields of lambdal- and lambdal+ combinations are measured. Semileptonic decays of b baryons result in a signal of 122 +/- 18(stat.)+22/-23(syst.) lambdal- combinations. From a fit to the impact parameter distribution of the leptons in the lambdal- sample, the lifetime of b baryons is measured to be 1.12+0.32/-0.29(stat.) +/- 0.16(syst.) ps.

A measurement of the b baryon lifetime / Buskulic, D., Decamp, D., Goy, C., Lees, J.-P., Minard, M.-N., Mours, B., Alemany, R., Ariztizabal, F., Comas, P., Crespo, J.M., Delfino, M., Fernandez, E., Gaitan, V., Garrido, Ll., Pacheco, A., Pascual, A., Creanza, D., de Palma, M., Farilla, A., Iaselli, G., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 297:3-4(1992), pp. 449-458. [10.1016/0370-2693(92)91284-G]

A measurement of the b baryon lifetime

Creanza, D.;Iaselli, G.;Maggi, G.;
1992

Abstract

In 451 000 hadronic Z0 decays, recorded with the ALEPH detector at LEP, the yields of lambdal- and lambdal+ combinations are measured. Semileptonic decays of b baryons result in a signal of 122 +/- 18(stat.)+22/-23(syst.) lambdal- combinations. From a fit to the impact parameter distribution of the leptons in the lambdal- sample, the lifetime of b baryons is measured to be 1.12+0.32/-0.29(stat.) +/- 0.16(syst.) ps.
1992
A measurement of the b baryon lifetime / Buskulic, D., Decamp, D., Goy, C., Lees, J.-P., Minard, M.-N., Mours, B., Alemany, R., Ariztizabal, F., Comas, P., Crespo, J.M., Delfino, M., Fernandez, E., Gaitan, V., Garrido, Ll., Pacheco, A., Pascual, A., Creanza, D., de Palma, M., Farilla, A., Iaselli, G., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 297:3-4(1992), pp. 449-458. [10.1016/0370-2693(92)91284-G]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/2783
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