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Measurement of time-integrated $D^0\to hh$ asymmetries at LHCb
LHCb collected the world’s largest sample of charm decays during LHC Run I, corresponding to an integrated luminosity of 3fb$^{−1}$. This has permitted many precision measurements of charm mixing and CP violation parameters. One of the most precise and important observables is the so-called $\Delta...
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Lenguaje: | eng |
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SISSA
2016
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Acceso en línea: | https://dx.doi.org/10.22323/1.273.0070 http://cds.cern.ch/record/2285234 |
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author | Marino, Pietro |
author_facet | Marino, Pietro |
author_sort | Marino, Pietro |
collection | CERN |
description | LHCb collected the world’s largest sample of charm decays during LHC Run I, corresponding to an integrated luminosity of 3fb$^{−1}$. This has permitted many precision measurements of charm mixing and CP violation parameters. One of the most precise and important observables is the so-called $\Delta A_{CP}$ parameter, corresponding to the difference between the time-integrated CP asymmetry in singly Cabibbo-suppressed $D^{0} \rightarrow K^{+}K^{-}$ and $D^{0} \rightarrow \pi^{+}\pi{-}$ decay modes. The flavour of the $D^{0}$ meson is inferred from the charge of the pion in $D^{∗+} \rightarrow D^{0}\pi^{+}$ and $D^{∗−} \rightarrow \overline{D}^{0}\pi^{-}$ decays. $\Delta A_{CP} \equiv A_{raw}(K^{+}K^{−})−A_{raw}(\pi^{+}\pi{−})$ is measured to be $\Delta A_{CP}=(−0.10±0.08±0.03)$%, where the first uncertainty is statistical and the second systematic. The measurement is consistent with the no- CP -violation hypothesis and represents the most precise measurement of time-integrated CP asymmetry in the charm sector. |
id | oai-inspirehep.net-1498499 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2016 |
publisher | SISSA |
record_format | invenio |
spelling | oai-inspirehep.net-14984992019-10-15T15:28:13Zdoi:10.22323/1.273.0070http://cds.cern.ch/record/2285234engMarino, PietroMeasurement of time-integrated $D^0\to hh$ asymmetries at LHCbParticle Physics - ExperimentLHCb collected the world’s largest sample of charm decays during LHC Run I, corresponding to an integrated luminosity of 3fb$^{−1}$. This has permitted many precision measurements of charm mixing and CP violation parameters. One of the most precise and important observables is the so-called $\Delta A_{CP}$ parameter, corresponding to the difference between the time-integrated CP asymmetry in singly Cabibbo-suppressed $D^{0} \rightarrow K^{+}K^{-}$ and $D^{0} \rightarrow \pi^{+}\pi{-}$ decay modes. The flavour of the $D^{0}$ meson is inferred from the charge of the pion in $D^{∗+} \rightarrow D^{0}\pi^{+}$ and $D^{∗−} \rightarrow \overline{D}^{0}\pi^{-}$ decays. $\Delta A_{CP} \equiv A_{raw}(K^{+}K^{−})−A_{raw}(\pi^{+}\pi{−})$ is measured to be $\Delta A_{CP}=(−0.10±0.08±0.03)$%, where the first uncertainty is statistical and the second systematic. The measurement is consistent with the no- CP -violation hypothesis and represents the most precise measurement of time-integrated CP asymmetry in the charm sector.SISSAoai:inspirehep.net:14984992016 |
spellingShingle | Particle Physics - Experiment Marino, Pietro Measurement of time-integrated $D^0\to hh$ asymmetries at LHCb |
title | Measurement of time-integrated $D^0\to hh$ asymmetries at LHCb |
title_full | Measurement of time-integrated $D^0\to hh$ asymmetries at LHCb |
title_fullStr | Measurement of time-integrated $D^0\to hh$ asymmetries at LHCb |
title_full_unstemmed | Measurement of time-integrated $D^0\to hh$ asymmetries at LHCb |
title_short | Measurement of time-integrated $D^0\to hh$ asymmetries at LHCb |
title_sort | measurement of time-integrated $d^0\to hh$ asymmetries at lhcb |
topic | Particle Physics - Experiment |
url | https://dx.doi.org/10.22323/1.273.0070 http://cds.cern.ch/record/2285234 |
work_keys_str_mv | AT marinopietro measurementoftimeintegratedd0tohhasymmetriesatlhcb |