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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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Autor principal: Reggiani, Davide
Lenguaje:eng
Publicado: 2008
Materias:
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
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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