A search for the Bc meson decaying into the channels J/ψπ+ and J/ψl+vl (l = e or μ) is performed in a sample of 3.9 million hadronic Z decays collected by the ALEPH detector. This search results in the observation of 0 and 2 candidates in each of these channels, respectively, while 0.44 and 0.81 background events are expected. The following 90% confidence level upper limits are derived:<!- FORMULA OMITTED -> Another B+c -> J/ψ(e+e-)μ+vμ candidate with very low background probability, found in an independent analysis, is also described in detail.

Search for the Bc meson in hadronic Z decays / R., B., D., B., D., D., P., G., C., G., J. P., L., A., L., M. N., M., J. Y., N., B., P., M. P., C., M., C., P., C., J. M., C., M., D., E., F., M., F.B., Garrido, L.l., A., J., M., M., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 402:(1997), pp. 213-226. [10.1016/S0370-2693(97)00461-9]

Search for the Bc meson in hadronic Z decays

GREGORIO, ANNA;BOSISIO, LUCIANO;GIANNINI, GIANROSSANO;
1997-01-01

Abstract

A search for the Bc meson decaying into the channels J/ψπ+ and J/ψl+vl (l = e or μ) is performed in a sample of 3.9 million hadronic Z decays collected by the ALEPH detector. This search results in the observation of 0 and 2 candidates in each of these channels, respectively, while 0.44 and 0.81 background events are expected. The following 90% confidence level upper limits are derived: Another B+c -> J/ψ(e+e-)μ+vμ candidate with very low background probability, found in an independent analysis, is also described in detail.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11368/2563022
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