In 450 000 hadronic Z decays recorded with the ALEPH detector at LEP, the yields of Ds−ℓ+ and Λc+ℓ− combinations have been measured. 16.0 ± 4.3 Ds−ℓ+ combinations were observed in the Ds− → ππ− channel and 17.0 ± 4.5 combinations were observed in the View the MathML source channel. 21.0 ± 5.0 Λc+ℓ− combinations were observed, with the Λc+ reconstructed in the decay mode Λc+ → pK−π+. These events provide evidence for the decays View the MathML source. Assuming that the Bs and Λb semileptonic decays are dominantly three-body, these observed yields, after background subtraction, translate into the following product branching ratios: View the MathML source, View the MathML source.

Observation of the semileptonic decays of BS and Λb hadrons at LEP / D. Buskulic, D. Decamp, C. Goy, J.-P. Lees, M.-N. Minard, B. Mours, R. Alemany, F. Ariztizabal, P. Comas, J.M. Crespo, M. Delfino, E. Fernandez, V. Gaitan, Ll. Garrido, A. Pacheco, A. Pascual, D. Creanza, M. de Palma, A. Farilla, G. Iaselli, et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - ELETTRONICO. - 294:(1992), pp. 145-156. [10.1016/0370-2693(92)91654-R]

Observation of the semileptonic decays of BS and Λb hadrons at LEP

FOCARDI, ETTORE;
1992

Abstract

In 450 000 hadronic Z decays recorded with the ALEPH detector at LEP, the yields of Ds−ℓ+ and Λc+ℓ− combinations have been measured. 16.0 ± 4.3 Ds−ℓ+ combinations were observed in the Ds− → ππ− channel and 17.0 ± 4.5 combinations were observed in the View the MathML source channel. 21.0 ± 5.0 Λc+ℓ− combinations were observed, with the Λc+ reconstructed in the decay mode Λc+ → pK−π+. These events provide evidence for the decays View the MathML source. Assuming that the Bs and Λb semileptonic decays are dominantly three-body, these observed yields, after background subtraction, translate into the following product branching ratios: View the MathML source, View the MathML source.
1992
294
145
156
D. Buskulic;D. Decamp;C. Goy;J.-P. Lees;M.-N. Minard;B. Mours;R. Alemany;F. Ariztizabal;P. Comas;J.M. Crespo;M. Delfino;E. Fernandez;V. G...espandi
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/638294
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