Measurement of the flavour-specific CP violating asymmetry asl in B0s decay

The CP violating asymmetry asl is studied with a sample of B0s or Bs0 semi-muonic decays in proton-proton collisions at a centre-of-mass energy of 7 TeV at LHCb with an integrated luminosity of 1 fb^-1. The final state studied is Ds{\mu}, with Ds reconstructed in the final state {\phi}{\pi}. The Ds{...

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Detalles Bibliográficos
Autor principal: Xing, Zhou
Lenguaje:eng
Publicado: 2012
Materias:
Particle Physics - Experiment
Acceso en línea:http://cds.cern.ch/record/1498320
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author Xing, Zhou
author_facet Xing, Zhou
author_sort Xing, Zhou
collection CERN
description The CP violating asymmetry asl is studied with a sample of B0s or Bs0 semi-muonic decays in proton-proton collisions at a centre-of-mass energy of 7 TeV at LHCb with an integrated luminosity of 1 fb^-1. The final state studied is Ds{\mu}, with Ds reconstructed in the final state {\phi}{\pi}. The Ds{\mu} yields are summed over untagged B0s and Bs0 initial states, and integrated with respect to decay time. Data driven methods have been developed to measure all the efficiency ratios needed to determine asl from the measured raw asymmetry. We obtain asl= (-0.24+/-0.54+/-0.33)%, where the first uncertainty is statistical and the second systematic.
id cern-1498320
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2012
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spelling cern-14983202023-03-14T17:53:23Zhttp://cds.cern.ch/record/1498320engXing, ZhouMeasurement of the flavour-specific CP violating asymmetry asl in B0s decayParticle Physics - ExperimentThe CP violating asymmetry asl is studied with a sample of B0s or Bs0 semi-muonic decays in proton-proton collisions at a centre-of-mass energy of 7 TeV at LHCb with an integrated luminosity of 1 fb^-1. The final state studied is Ds{\mu}, with Ds reconstructed in the final state {\phi}{\pi}. The Ds{\mu} yields are summed over untagged B0s and Bs0 initial states, and integrated with respect to decay time. Data driven methods have been developed to measure all the efficiency ratios needed to determine asl from the measured raw asymmetry. We obtain asl= (-0.24+/-0.54+/-0.33)%, where the first uncertainty is statistical and the second systematic.The CP violating asymmetry asl is studied with a sample of Bs0 or Bs0bar semi-muonic decays in proton-proton collisions at a centre-of-mass energy of 7 TeV at LHCb with an integrated luminosity of 1 fb^-1. The final state studied is Ds{\mu}, with Ds reconstructed in the final state {\phi}{\pi}. The Ds{\mu} yields are summed over untagged Bs0 and Bs0bar initial states, and integrated with respect to decay time. Data driven methods have been developed to measure all the efficiency ratios needed to determine asl from the measured raw asymmetry. We obtain asl= (-0.24+/-0.54+/-0.33)%, where the first uncertainty is statistical and the second systematic.arXiv:1212.1175oai:cds.cern.ch:14983202012-12-07
spellingShingle Particle Physics - Experiment
Xing, Zhou
Measurement of the flavour-specific CP violating asymmetry asl in B0s decay
title Measurement of the flavour-specific CP violating asymmetry asl in B0s decay
title_full Measurement of the flavour-specific CP violating asymmetry asl in B0s decay
title_fullStr Measurement of the flavour-specific CP violating asymmetry asl in B0s decay
title_full_unstemmed Measurement of the flavour-specific CP violating asymmetry asl in B0s decay
title_short Measurement of the flavour-specific CP violating asymmetry asl in B0s decay
title_sort measurement of the flavour-specific cp violating asymmetry asl in b0s decay
topic Particle Physics - Experiment
url http://cds.cern.ch/record/1498320
work_keys_str_mv AT xingzhou measurementoftheflavourspecificcpviolatingasymmetryaslinb0sdecay

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