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Measurement of CP asymmetries in $D^0 \rightarrow hh$ decays

The latest measurements of the individual time-integrated CP asymmetry in the Cabibbo-suppressed decays $D^0\rightarrow hh$ decays are presented. The results are based on $pp$ collision data, corresponding to an integrated luminosity of $3 fb^{-1}$, collected with the LHCb detector at centre-of-mass...

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Autor principal: Gersabeck, Evelina
Lenguaje:eng
Publicado: SISSA 2016
Materias:
Acceso en línea:https://dx.doi.org/10.22323/1.289.0089
http://cds.cern.ch/record/2239329
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author Gersabeck, Evelina
author_facet Gersabeck, Evelina
author_sort Gersabeck, Evelina
collection CERN
description The latest measurements of the individual time-integrated CP asymmetry in the Cabibbo-suppressed decays $D^0\rightarrow hh$ decays are presented. The results are based on $pp$ collision data, corresponding to an integrated luminosity of $3 fb^{-1}$, collected with the LHCb detector at centre-of-mass energies of 7 and 8 TeV. A combination of the asymmetries using both prompt and secondary charm decays is presented $A_{CP}(K^-K^+) = (0.04 \pm 0.12(stat) \pm 0.10(syst))%$; $A_{CP}(\pi^-\pi^+) = (0.07 \pm 0.14(stat) \pm 0.11(syst))$. These are the most precise measurements from a single experiment. The result for $A_{CP}(K^-K^+)$ is the most precise determination of a time-integrated CP asymmetry in the charm sector to date, and neither measurement shows evidence of CP asymmetry.
id cern-2239329
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2016
publisher SISSA
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spelling cern-22393292021-09-16T11:32:57Zdoi:10.22323/1.289.0089http://cds.cern.ch/record/2239329engGersabeck, EvelinaMeasurement of CP asymmetries in $D^0 \rightarrow hh$ decayshep-exParticle Physics - ExperimentThe latest measurements of the individual time-integrated CP asymmetry in the Cabibbo-suppressed decays $D^0\rightarrow hh$ decays are presented. The results are based on $pp$ collision data, corresponding to an integrated luminosity of $3 fb^{-1}$, collected with the LHCb detector at centre-of-mass energies of 7 and 8 TeV. A combination of the asymmetries using both prompt and secondary charm decays is presented $A_{CP}(K^-K^+) = (0.04 \pm 0.12(stat) \pm 0.10(syst))%$; $A_{CP}(\pi^-\pi^+) = (0.07 \pm 0.14(stat) \pm 0.11(syst))$. These are the most precise measurements from a single experiment. The result for $A_{CP}(K^-K^+)$ is the most precise determination of a time-integrated CP asymmetry in the charm sector to date, and neither measurement shows evidence of CP asymmetry.SISSAarXiv:1612.05118oai:cds.cern.ch:22393292016-12-15
spellingShingle hep-ex
Particle Physics - Experiment
Gersabeck, Evelina
Measurement of CP asymmetries in $D^0 \rightarrow hh$ decays
title Measurement of CP asymmetries in $D^0 \rightarrow hh$ decays
title_full Measurement of CP asymmetries in $D^0 \rightarrow hh$ decays
title_fullStr Measurement of CP asymmetries in $D^0 \rightarrow hh$ decays
title_full_unstemmed Measurement of CP asymmetries in $D^0 \rightarrow hh$ decays
title_short Measurement of CP asymmetries in $D^0 \rightarrow hh$ decays
title_sort measurement of cp asymmetries in $d^0 \rightarrow hh$ decays
topic hep-ex
Particle Physics - Experiment
url https://dx.doi.org/10.22323/1.289.0089
http://cds.cern.ch/record/2239329
work_keys_str_mv AT gersabeckevelina measurementofcpasymmetriesind0rightarrowhhdecays