Measurement of $\Delta m_s$ in the decay $B^0_s \rightarrow D^-_s(K^+K^-\pi^-)(3)\pi$

The $B^0_s-\overline{B^0_s}$ mixing frequency $\Delta m_s$ is measured on a dataset of 36 pb$^{-1}$ from the LHCb physics run in 2010. About 1350 $B^0_s$ signal candidates are constructed in $B^0_s \rightarrow D^-_s \pi$ and $B^0_s \rightarrow D_s 3\pi$ decays, with average proper time resolutions o...

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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/1328960
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author The LHCb Collaboration
author_facet The LHCb Collaboration
author_sort The LHCb Collaboration
collection CERN
description The $B^0_s-\overline{B^0_s}$ mixing frequency $\Delta m_s$ is measured on a dataset of 36 pb$^{-1}$ from the LHCb physics run in 2010. About 1350 $B^0_s$ signal candidates are constructed in $B^0_s \rightarrow D^-_s \pi$ and $B^0_s \rightarrow D_s 3\pi$ decays, with average proper time resolutions of 44 and 36~fs, respectively. Using opposite side flavour taggers with an effective tagging efficiency of $\epsilon_{eff}$ = 3.8 $\pm$ 2.1 \% a 4.6 $\sigma$ significant mixing signal (stat. only) is found. The preliminary mixing frequency measured is $\Delta m_s$ = 17.63 $\pm$ 0.11 (stat.) $\pm$ 0.04 (syst.)~ps$^{-1}$.
id cern-1328960
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2011
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spelling cern-13289602019-09-30T06:29:59Zhttp://cds.cern.ch/record/1328960engThe LHCb CollaborationMeasurement of $\Delta m_s$ in the decay $B^0_s \rightarrow D^-_s(K^+K^-\pi^-)(3)\pi$Particle Physics - ExperimentThe $B^0_s-\overline{B^0_s}$ mixing frequency $\Delta m_s$ is measured on a dataset of 36 pb$^{-1}$ from the LHCb physics run in 2010. About 1350 $B^0_s$ signal candidates are constructed in $B^0_s \rightarrow D^-_s \pi$ and $B^0_s \rightarrow D_s 3\pi$ decays, with average proper time resolutions of 44 and 36~fs, respectively. Using opposite side flavour taggers with an effective tagging efficiency of $\epsilon_{eff}$ = 3.8 $\pm$ 2.1 \% a 4.6 $\sigma$ significant mixing signal (stat. only) is found. The preliminary mixing frequency measured is $\Delta m_s$ = 17.63 $\pm$ 0.11 (stat.) $\pm$ 0.04 (syst.)~ps$^{-1}$.LHCb-CONF-2011-005CERN-LHCb-CONF-2011-005oai:cds.cern.ch:13289602011-04-07
spellingShingle Particle Physics - Experiment
The LHCb Collaboration
Measurement of $\Delta m_s$ in the decay $B^0_s \rightarrow D^-_s(K^+K^-\pi^-)(3)\pi$
title Measurement of $\Delta m_s$ in the decay $B^0_s \rightarrow D^-_s(K^+K^-\pi^-)(3)\pi$
title_full Measurement of $\Delta m_s$ in the decay $B^0_s \rightarrow D^-_s(K^+K^-\pi^-)(3)\pi$
title_fullStr Measurement of $\Delta m_s$ in the decay $B^0_s \rightarrow D^-_s(K^+K^-\pi^-)(3)\pi$
title_full_unstemmed Measurement of $\Delta m_s$ in the decay $B^0_s \rightarrow D^-_s(K^+K^-\pi^-)(3)\pi$
title_short Measurement of $\Delta m_s$ in the decay $B^0_s \rightarrow D^-_s(K^+K^-\pi^-)(3)\pi$
title_sort measurement of $\delta m_s$ in the decay $b^0_s \rightarrow d^-_s(k^+k^-\pi^-)(3)\pi$
topic Particle Physics - Experiment
url http://cds.cern.ch/record/1328960
work_keys_str_mv AT thelhcbcollaboration measurementofdeltamsinthedecayb0srightarrowdskkpi3pi

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