Feasibility study for the measurement of CP violation in B0 →D−KSπ+ decays at LHCb

We report a feasibility study for measuring mixing-induced CP violation in B0 → D−KSπ+ decays. The analysis is carried out using the full Run 1 and Run 2 data samples corresponding to about 9 fb−1 collected by the LHCb experiment in proton-proton collision at the LHC at center of mass energies 7, 8...

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Detalles Bibliográficos
Autores principales: Buhayeuskaya, Maryia, Wang, Yuxiao
Lenguaje:eng
Publicado: 2021
Materias:
Physics in General
Acceso en línea:http://cds.cern.ch/record/2784451
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author Buhayeuskaya, Maryia
Wang, Yuxiao
author_facet Buhayeuskaya, Maryia
Wang, Yuxiao
author_sort Buhayeuskaya, Maryia
collection CERN
description We report a feasibility study for measuring mixing-induced CP violation in B0 → D−KSπ+ decays. The analysis is carried out using the full Run 1 and Run 2 data samples corresponding to about 9 fb−1 collected by the LHCb experiment in proton-proton collision at the LHC at center of mass energies 7, 8 and 13 TeV. A cut-based preselection is combined with a highly-efficient multivariate classifier to suppress combinatorial background. Various physics background sources are identified and vetoed. The signal yield is estimated to be 13074 ± 414 by means of a fit to the reconstructed B and KS mass distributions. As first steps towards a time-dependent analysis of the decay, the decay-time resolution and acceptance are studied using simulated decays.
id cern-2784451
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2021
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spelling cern-27844512021-10-18T21:50:14Zhttp://cds.cern.ch/record/2784451engBuhayeuskaya, MaryiaWang, YuxiaoFeasibility study for the measurement of CP violation in B0 →D−KSπ+ decays at LHCbPhysics in GeneralWe report a feasibility study for measuring mixing-induced CP violation in B0 → D−KSπ+ decays. The analysis is carried out using the full Run 1 and Run 2 data samples corresponding to about 9 fb−1 collected by the LHCb experiment in proton-proton collision at the LHC at center of mass energies 7, 8 and 13 TeV. A cut-based preselection is combined with a highly-efficient multivariate classifier to suppress combinatorial background. Various physics background sources are identified and vetoed. The signal yield is estimated to be 13074 ± 414 by means of a fit to the reconstructed B and KS mass distributions. As first steps towards a time-dependent analysis of the decay, the decay-time resolution and acceptance are studied using simulated decays.CERN-STUDENTS-Note-2021-205oai:cds.cern.ch:27844512021-10-18
spellingShingle Physics in General
Buhayeuskaya, Maryia
Wang, Yuxiao
Feasibility study for the measurement of CP violation in B0 →D−KSπ+ decays at LHCb
title Feasibility study for the measurement of CP violation in B0 →D−KSπ+ decays at LHCb
title_full Feasibility study for the measurement of CP violation in B0 →D−KSπ+ decays at LHCb
title_fullStr Feasibility study for the measurement of CP violation in B0 →D−KSπ+ decays at LHCb
title_full_unstemmed Feasibility study for the measurement of CP violation in B0 →D−KSπ+ decays at LHCb
title_short Feasibility study for the measurement of CP violation in B0 →D−KSπ+ decays at LHCb
title_sort feasibility study for the measurement of cp violation in b0 →d−ksπ+ decays at lhcb
topic Physics in General
url http://cds.cern.ch/record/2784451
work_keys_str_mv AT buhayeuskayamaryia feasibilitystudyforthemeasurementofcpviolationinb0dkspdecaysatlhcb
AT wangyuxiao feasibilitystudyforthemeasurementofcpviolationinb0dkspdecaysatlhcb

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