Improved Measurement of the $B^{0}_{s}$ lifetime with $D^{-}_{s} l^{+}$ combinations

The lifetime of the Bs meson is measured in approximately 3 million hadronic Z decays accumulated using the ALEPH detector at LEP from 1991 to 1994. Seven different Ds decay modes were reconstructed and combined with an opposite sign lepton as evidence of semileptonic Bs decays. Two hundred and fort...

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Detalles Bibliográficos
Autores principales: Hayes, O J, Jaffe, D E, Schune, M H
Lenguaje:eng
Publicado: 1995
Materias:
Particle Physics - Experiment
Acceso en línea:http://cds.cern.ch/record/397888
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author Hayes, O J
Jaffe, D E
Schune, M H
author_facet Hayes, O J
Jaffe, D E
Schune, M H
author_sort Hayes, O J
collection CERN
description The lifetime of the Bs meson is measured in approximately 3 million hadronic Z decays accumulated using the ALEPH detector at LEP from 1991 to 1994. Seven different Ds decay modes were reconstructed and combined with an opposite sign lepton as evidence of semileptonic Bs decays. Two hundred and forty-one Ds-lepton candidates satisfy selection criteria designed to ensure precise proper time reconstruction and yield a measured Bs lifetime of 1.64 +0.16-0.14 (stat) +-0.04 (syst) ps. The selection criteria are relaxed in order to calculate the product branching ratio, 0.92 +-0.09 (stat) +-0.16 (syst) %.
id cern-397888
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1995
record_format invenio
spelling cern-3978882019-09-30T06:29:59Zhttp://cds.cern.ch/record/397888engHayes, O JJaffe, D ESchune, M HImproved Measurement of the $B^{0}_{s}$ lifetime with $D^{-}_{s} l^{+}$ combinationsParticle Physics - ExperimentThe lifetime of the Bs meson is measured in approximately 3 million hadronic Z decays accumulated using the ALEPH detector at LEP from 1991 to 1994. Seven different Ds decay modes were reconstructed and combined with an opposite sign lepton as evidence of semileptonic Bs decays. Two hundred and forty-one Ds-lepton candidates satisfy selection criteria designed to ensure precise proper time reconstruction and yield a measured Bs lifetime of 1.64 +0.16-0.14 (stat) +-0.04 (syst) ps. The selection criteria are relaxed in order to calculate the product branching ratio, 0.92 +-0.09 (stat) +-0.16 (syst) %.CERN-OPEN-99-066EPS-0402oai:cds.cern.ch:3978881995-07-27
spellingShingle Particle Physics - Experiment
Hayes, O J
Jaffe, D E
Schune, M H
Improved Measurement of the $B^{0}_{s}$ lifetime with $D^{-}_{s} l^{+}$ combinations
title Improved Measurement of the $B^{0}_{s}$ lifetime with $D^{-}_{s} l^{+}$ combinations
title_full Improved Measurement of the $B^{0}_{s}$ lifetime with $D^{-}_{s} l^{+}$ combinations
title_fullStr Improved Measurement of the $B^{0}_{s}$ lifetime with $D^{-}_{s} l^{+}$ combinations
title_full_unstemmed Improved Measurement of the $B^{0}_{s}$ lifetime with $D^{-}_{s} l^{+}$ combinations
title_short Improved Measurement of the $B^{0}_{s}$ lifetime with $D^{-}_{s} l^{+}$ combinations
title_sort improved measurement of the $b^{0}_{s}$ lifetime with $d^{-}_{s} l^{+}$ combinations
topic Particle Physics - Experiment
url http://cds.cern.ch/record/397888
work_keys_str_mv AT hayesoj improvedmeasurementoftheb0slifetimewithdslcombinations
AT jaffede improvedmeasurementoftheb0slifetimewithdslcombinations
AT schunemh improvedmeasurementoftheb0slifetimewithdslcombinations

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