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Measuring c-quark polarization in W+c samples at ATLAS and CMS
The process $pp \to W^-c$ produces polarized charm quarks. The polarization is expected to be partly retained in $\Lambda_c$ baryons when those form in the $c$-quark hadronization. We argue that it will likely be possible for ATLAS and CMS to measure the $\Lambda_c$ polarization in the $W$+$c$ sampl...
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Lenguaje: | eng |
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2015
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Acceso en línea: | https://dx.doi.org/10.1007/JHEP11(2016)011 http://cds.cern.ch/record/2110455 |
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author | Kats, Yevgeny |
author_facet | Kats, Yevgeny |
author_sort | Kats, Yevgeny |
collection | CERN |
description | The process $pp \to W^-c$ produces polarized charm quarks. The polarization is expected to be partly retained in $\Lambda_c$ baryons when those form in the $c$-quark hadronization. We argue that it will likely be possible for ATLAS and CMS to measure the $\Lambda_c$ polarization in the $W$+$c$ samples in Run 2 of the LHC. This can become the first measurement ever of a longitudinal polarization of charm quarks. Its results will provide a unique input to the understanding of polarization transfer in fragmentation. They will also allow applying the same measurement technique to other (e.g., new physics) samples of charm quarks in which the polarization is a priori unknown. The proposed analysis is similar to the ATLAS and CMS measurements of the $W$+$c$ cross section in the 7 TeV run that used reconstructed $D$-meson decays for charm tagging. |
id | cern-2110455 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2015 |
record_format | invenio |
spelling | cern-21104552022-08-10T12:51:45Zdoi:10.1007/JHEP11(2016)011http://cds.cern.ch/record/2110455engKats, YevgenyMeasuring c-quark polarization in W+c samples at ATLAS and CMSParticle Physics - PhenomenologyParticle Physics - ExperimentParticle Physics - PhenomenologyThe process $pp \to W^-c$ produces polarized charm quarks. The polarization is expected to be partly retained in $\Lambda_c$ baryons when those form in the $c$-quark hadronization. We argue that it will likely be possible for ATLAS and CMS to measure the $\Lambda_c$ polarization in the $W$+$c$ samples in Run 2 of the LHC. This can become the first measurement ever of a longitudinal polarization of charm quarks. Its results will provide a unique input to the understanding of polarization transfer in fragmentation. They will also allow applying the same measurement technique to other (e.g., new physics) samples of charm quarks in which the polarization is a priori unknown. The proposed analysis is similar to the ATLAS and CMS measurements of the $W$+$c$ cross section in the 7 TeV run that used reconstructed $D$-meson decays for charm tagging.The process pp → W$^{−}$ c produces polarized charm quarks. The polarization is expected to be partly retained in Λ$_{c}$ baryons when those form in the c-quark hadronization. We argue that it will likely be possible for ATLAS and CMS to measure the Λ$_{c}$ polarization in the W +c samples in Run 2 of the LHC. This can become the first measurement ever of a longitudinal polarization of charm quarks. Its results will provide a unique input to the understanding of polarization transfer in fragmentation. They will also allow applying the same measurement technique to other (e.g., new physics) samples of charm quarks in which the polarization is a priori unknown. The proposed analysis is similar to the ATLAS and CMS measurements of the W +c cross section in the 7 TeV run that used reconstructed D-meson decays for charm tagging.The process $pp \to W^-c$ produces polarized charm quarks. The polarization is expected to be partly retained in $\Lambda_c$ baryons when those form in the $c$-quark hadronization. We argue that it will likely be possible for ATLAS and CMS to measure the $\Lambda_c$ polarization in the $W$+$c$ samples in Run 2 of the LHC. This can become the first measurement ever of a longitudinal polarization of charm quarks. Its results will provide a unique input to the understanding of polarization transfer in fragmentation. They will also allow applying the same measurement technique to other (e.g., new physics) samples of charm quarks in which the polarization is a priori unknown. The proposed analysis is similar to the ATLAS and CMS measurements of the $W$+$c$ cross section in the 7 TeV run that used reconstructed $D$-meson decays for charm tagging.arXiv:1512.00438oai:cds.cern.ch:21104552015-12-01 |
spellingShingle | Particle Physics - Phenomenology Particle Physics - Experiment Particle Physics - Phenomenology Kats, Yevgeny Measuring c-quark polarization in W+c samples at ATLAS and CMS |
title | Measuring c-quark polarization in W+c samples at ATLAS and CMS |
title_full | Measuring c-quark polarization in W+c samples at ATLAS and CMS |
title_fullStr | Measuring c-quark polarization in W+c samples at ATLAS and CMS |
title_full_unstemmed | Measuring c-quark polarization in W+c samples at ATLAS and CMS |
title_short | Measuring c-quark polarization in W+c samples at ATLAS and CMS |
title_sort | measuring c-quark polarization in w+c samples at atlas and cms |
topic | Particle Physics - Phenomenology Particle Physics - Experiment Particle Physics - Phenomenology |
url | https://dx.doi.org/10.1007/JHEP11(2016)011 http://cds.cern.ch/record/2110455 |
work_keys_str_mv | AT katsyevgeny measuringcquarkpolarizationinwcsamplesatatlasandcms |