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Recent results from COMPASS
The COMPASS experiment at CERN is studying since 2002 the spin structure of the nucleon, both for longitudinal and transverse nucleon spin. In the first case, the measurements of DIS and SIDIS asymmetries, including also high-$p_{T}$ hadron production and $D^{0}$ mesons, allow to access the nucleon...
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Lenguaje: | eng |
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2011
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Acceso en línea: | https://dx.doi.org/10.1088/1742-6596/295/1/012010 http://cds.cern.ch/record/1494624 |
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author | Bressan, Andrea |
author_facet | Bressan, Andrea |
author_sort | Bressan, Andrea |
collection | CERN |
description | The COMPASS experiment at CERN is studying since 2002 the spin structure of the nucleon, both for longitudinal and transverse nucleon spin. In the first case, the measurements of DIS and SIDIS asymmetries, including also high-$p_{T}$ hadron production and $D^{0}$ mesons, allow to access the nucleon longitudinal PDFs, their first moments and the gluon polarization. The LO analysis, performed by COMPASS have shown that $\Delta g/g$ is small around $x_{g}\simeq 0.1$, and its first moment should not be larger than 0.2 $−$ 0.3 in absolute value. Transverse spin effects have rised large interest in the last 10 years and the measurements performed have shown evidence for new phenomena, associated with transverse momentum dependent distribution and fragmentation functions. Collins and Sivers asymmetries obtained by COMPASS on a proton target, together with the latest results on unpolarized modulations on the deuterated $^{6}$Li target will be shown here. |
id | cern-1494624 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2011 |
record_format | invenio |
spelling | cern-14946242022-08-17T13:30:06Zdoi:10.1088/1742-6596/295/1/012010http://cds.cern.ch/record/1494624engBressan, AndreaRecent results from COMPASSParticle Physics - ExperimentThe COMPASS experiment at CERN is studying since 2002 the spin structure of the nucleon, both for longitudinal and transverse nucleon spin. In the first case, the measurements of DIS and SIDIS asymmetries, including also high-$p_{T}$ hadron production and $D^{0}$ mesons, allow to access the nucleon longitudinal PDFs, their first moments and the gluon polarization. The LO analysis, performed by COMPASS have shown that $\Delta g/g$ is small around $x_{g}\simeq 0.1$, and its first moment should not be larger than 0.2 $−$ 0.3 in absolute value. Transverse spin effects have rised large interest in the last 10 years and the measurements performed have shown evidence for new phenomena, associated with transverse momentum dependent distribution and fragmentation functions. Collins and Sivers asymmetries obtained by COMPASS on a proton target, together with the latest results on unpolarized modulations on the deuterated $^{6}$Li target will be shown here.oai:cds.cern.ch:14946242011 |
spellingShingle | Particle Physics - Experiment Bressan, Andrea Recent results from COMPASS |
title | Recent results from COMPASS |
title_full | Recent results from COMPASS |
title_fullStr | Recent results from COMPASS |
title_full_unstemmed | Recent results from COMPASS |
title_short | Recent results from COMPASS |
title_sort | recent results from compass |
topic | Particle Physics - Experiment |
url | https://dx.doi.org/10.1088/1742-6596/295/1/012010 http://cds.cern.ch/record/1494624 |
work_keys_str_mv | AT bressanandrea recentresultsfromcompass |