Study of prompt $J/\psi$ production in hadronic Z decays

A measurement of prompt J/psi production with low model dependence is performed on 3.9 million hadronic Z decays collected by the ALEPH detector. The sample of J/psi at short decay-length shows an excess 46+/-12 prompt J/psi on a background of 57 B decay and 18 combinatorial events, yielding the bra...

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Detalles Bibliográficos
Autor principal: Rousseau, D
Lenguaje:eng
Publicado: 1997
Materias:
Particle Physics - Experiment
Acceso en línea:http://cds.cern.ch/record/409014
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author Rousseau, D
author_facet Rousseau, D
author_sort Rousseau, D
collection CERN
description A measurement of prompt J/psi production with low model dependence is performed on 3.9 million hadronic Z decays collected by the ALEPH detector. The sample of J/psi at short decay-length shows an excess 46+/-12 prompt J/psi on a background of 57 B decay and 18 combinatorial events, yielding the branching ratio Br(Z->prompt J/psi X)= (3.00+/- 0.78(stat) +/- 0.30(syst) +/- 0.15(theo)) *10^-4. This result is consistent with a theoretical prediction allowing for color-octet gluon->J/psi as well as c quark fragmentation.
id cern-409014
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1997
record_format invenio
spelling cern-4090142019-09-30T06:29:59Zhttp://cds.cern.ch/record/409014engRousseau, DStudy of prompt $J/\psi$ production in hadronic Z decaysParticle Physics - ExperimentA measurement of prompt J/psi production with low model dependence is performed on 3.9 million hadronic Z decays collected by the ALEPH detector. The sample of J/psi at short decay-length shows an excess 46+/-12 prompt J/psi on a background of 57 B decay and 18 combinatorial events, yielding the branching ratio Br(Z->prompt J/psi X)= (3.00+/- 0.78(stat) +/- 0.30(syst) +/- 0.15(theo)) *10^-4. This result is consistent with a theoretical prediction allowing for color-octet gluon->J/psi as well as c quark fragmentation.CERN-OPEN-99-343oai:cds.cern.ch:4090141997-08-19
spellingShingle Particle Physics - Experiment
Rousseau, D
Study of prompt $J/\psi$ production in hadronic Z decays
title Study of prompt $J/\psi$ production in hadronic Z decays
title_full Study of prompt $J/\psi$ production in hadronic Z decays
title_fullStr Study of prompt $J/\psi$ production in hadronic Z decays
title_full_unstemmed Study of prompt $J/\psi$ production in hadronic Z decays
title_short Study of prompt $J/\psi$ production in hadronic Z decays
title_sort study of prompt $j/\psi$ production in hadronic z decays
topic Particle Physics - Experiment
url http://cds.cern.ch/record/409014
work_keys_str_mv AT rousseaud studyofpromptjpsiproductioninhadroniczdecays

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