Measurement of $\Delta m_s$ in the decay $B^0_s \rightarrow D^-_s(K^+K^-\pi^-)\pi^+$ using opposite-side and same-side flavour tagging algorithms

The $B^0_s$-$\overline{B^0_s}$ oscillation frequency $\Delta m_s$is measured on a data sample of 340 pb$^{-1}$ from the LHCb physics run in 2011. A total of 9189 $B^0_s$ signal candidates are reconstructed in the $B^0_s \rightarrow D^-_s \pi^+$ decay, with an average decay time resolution of 45 fs....

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Detalles Bibliográficos
Autor principal: The LHCb Collaboration
Lenguaje:eng
Publicado: 2011
Materias:
Particle Physics - Experiment
Acceso en línea:http://cds.cern.ch/record/1374146
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author The LHCb Collaboration
author_facet The LHCb Collaboration
author_sort The LHCb Collaboration
collection CERN
description The $B^0_s$-$\overline{B^0_s}$ oscillation frequency $\Delta m_s$is measured on a data sample of 340 pb$^{-1}$ from the LHCb physics run in 2011. A total of 9189 $B^0_s$ signal candidates are reconstructed in the $B^0_s \rightarrow D^-_s \pi^+$ decay, with an average decay time resolution of 45 fs. We established an oscillation signal using for the first time in LHCb the same-side kaon tagging and measured its effective tagging efficiency of $\epsilon_{\text{eff}_\text{SSKT}}$ = 1.3$\pm$ 0.4 %. The most precise value of the oscillation frequency is found to be $\Delta m_s$ = 17.725$\pm$ 0.041(stat) $\pm$0.026 (syst)ps$^{-1}$ using a combination of opposite-side and same-side flavour tagging algorithms.
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institution Organización Europea para la Investigación Nuclear
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spelling cern-13741462019-09-30T06:29:59Zhttp://cds.cern.ch/record/1374146engThe LHCb CollaborationMeasurement of $\Delta m_s$ in the decay $B^0_s \rightarrow D^-_s(K^+K^-\pi^-)\pi^+$ using opposite-side and same-side flavour tagging algorithmsParticle Physics - ExperimentThe $B^0_s$-$\overline{B^0_s}$ oscillation frequency $\Delta m_s$is measured on a data sample of 340 pb$^{-1}$ from the LHCb physics run in 2011. A total of 9189 $B^0_s$ signal candidates are reconstructed in the $B^0_s \rightarrow D^-_s \pi^+$ decay, with an average decay time resolution of 45 fs. We established an oscillation signal using for the first time in LHCb the same-side kaon tagging and measured its effective tagging efficiency of $\epsilon_{\text{eff}_\text{SSKT}}$ = 1.3$\pm$ 0.4 %. The most precise value of the oscillation frequency is found to be $\Delta m_s$ = 17.725$\pm$ 0.041(stat) $\pm$0.026 (syst)ps$^{-1}$ using a combination of opposite-side and same-side flavour tagging algorithms.LHCb-CONF-2011-050CERN-LHCb-CONF-2011-050oai:cds.cern.ch:13741462011-08-09
spellingShingle Particle Physics - Experiment
The LHCb Collaboration
Measurement of $\Delta m_s$ in the decay $B^0_s \rightarrow D^-_s(K^+K^-\pi^-)\pi^+$ using opposite-side and same-side flavour tagging algorithms
title Measurement of $\Delta m_s$ in the decay $B^0_s \rightarrow D^-_s(K^+K^-\pi^-)\pi^+$ using opposite-side and same-side flavour tagging algorithms
title_full Measurement of $\Delta m_s$ in the decay $B^0_s \rightarrow D^-_s(K^+K^-\pi^-)\pi^+$ using opposite-side and same-side flavour tagging algorithms
title_fullStr Measurement of $\Delta m_s$ in the decay $B^0_s \rightarrow D^-_s(K^+K^-\pi^-)\pi^+$ using opposite-side and same-side flavour tagging algorithms
title_full_unstemmed Measurement of $\Delta m_s$ in the decay $B^0_s \rightarrow D^-_s(K^+K^-\pi^-)\pi^+$ using opposite-side and same-side flavour tagging algorithms
title_short Measurement of $\Delta m_s$ in the decay $B^0_s \rightarrow D^-_s(K^+K^-\pi^-)\pi^+$ using opposite-side and same-side flavour tagging algorithms
title_sort measurement of $\delta m_s$ in the decay $b^0_s \rightarrow d^-_s(k^+k^-\pi^-)\pi^+$ using opposite-side and same-side flavour tagging algorithms
topic Particle Physics - Experiment
url http://cds.cern.ch/record/1374146
work_keys_str_mv AT thelhcbcollaboration measurementofdeltamsinthedecayb0srightarrowdskkpipiusingoppositesideandsamesideflavourtaggingalgorithms

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