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Measurement of the Gluon Polarization of the Nucleon at COMPASS
The determination of the gluon polarization $\Delta G/G$ represents one of the main goals of the COMPASS Collaboration at CERN. This quantity is experimentally accessible by selecting photon gluon fusion (PGF) events in the scattering of a polarized 160 GeV muon beam off a polarized $^{6}$LiD target...
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Lenguaje: | eng |
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2008
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Acceso en línea: | https://dx.doi.org/10.1016/j.nuclphysbps.2008.09.135 http://cds.cern.ch/record/1166088 |
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author | Reggiani, Davide |
author_facet | Reggiani, Davide |
author_sort | Reggiani, Davide |
collection | CERN |
description | The determination of the gluon polarization $\Delta G/G$ represents one of the main goals of the COMPASS Collaboration at CERN. This quantity is experimentally accessible by selecting photon gluon fusion (PGF) events in the scattering of a polarized 160 GeV muon beam off a polarized $^{6}$LiD target. At COMPASS the PGF mechanism is tagged by means of three different channels: charmed meson production and high-$pT$ hadron pairs in either electro-production ($Q^{2} >$ 1 GeV$^{2}$) or quasi-real photo-production ($Q^{2} <$ 1 GeV$^{2}$). The status of the different analyses and the $\Delta G/G$ results obtained from the 2002-04 data samples are presented. The most precise measurement comes from the hight-$pT$ quasi-real photo-production, yielding a small gluon polarization. |
id | cern-1166088 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2008 |
record_format | invenio |
spelling | cern-11660882019-09-30T06:29:59Zdoi:10.1016/j.nuclphysbps.2008.09.135http://cds.cern.ch/record/1166088engReggiani, DavideMeasurement of the Gluon Polarization of the Nucleon at COMPASSParticle Physics - ExperimentThe determination of the gluon polarization $\Delta G/G$ represents one of the main goals of the COMPASS Collaboration at CERN. This quantity is experimentally accessible by selecting photon gluon fusion (PGF) events in the scattering of a polarized 160 GeV muon beam off a polarized $^{6}$LiD target. At COMPASS the PGF mechanism is tagged by means of three different channels: charmed meson production and high-$pT$ hadron pairs in either electro-production ($Q^{2} >$ 1 GeV$^{2}$) or quasi-real photo-production ($Q^{2} <$ 1 GeV$^{2}$). The status of the different analyses and the $\Delta G/G$ results obtained from the 2002-04 data samples are presented. The most precise measurement comes from the hight-$pT$ quasi-real photo-production, yielding a small gluon polarization.oai:cds.cern.ch:11660882008 |
spellingShingle | Particle Physics - Experiment Reggiani, Davide Measurement of the Gluon Polarization of the Nucleon at COMPASS |
title | Measurement of the Gluon Polarization of the Nucleon at COMPASS |
title_full | Measurement of the Gluon Polarization of the Nucleon at COMPASS |
title_fullStr | Measurement of the Gluon Polarization of the Nucleon at COMPASS |
title_full_unstemmed | Measurement of the Gluon Polarization of the Nucleon at COMPASS |
title_short | Measurement of the Gluon Polarization of the Nucleon at COMPASS |
title_sort | measurement of the gluon polarization of the nucleon at compass |
topic | Particle Physics - Experiment |
url | https://dx.doi.org/10.1016/j.nuclphysbps.2008.09.135 http://cds.cern.ch/record/1166088 |
work_keys_str_mv | AT reggianidavide measurementofthegluonpolarizationofthenucleonatcompass |