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Characterizing the medium created in Pb–Pb collisions at by means of the evolution of two-particle transverse momentum correlations
Two-particle correlations are powerful tools for studying the medium produced in heavy-ion collisions. In particular, two-particle transverse momentum correlations enable measurements of the collision dynamics sensitive to momentum currents. Their evolution with collision centrality, which is relate...
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Lenguaje: | eng |
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2020
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Acceso en línea: | https://dx.doi.org/10.1088/1742-6596/1602/1/012010 http://cds.cern.ch/record/2749162 |
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author | González, V íctor |
author_facet | González, V íctor |
author_sort | González, V íctor |
collection | CERN |
description | Two-particle correlations are powerful tools for studying the medium produced in heavy-ion collisions. In particular, two-particle transverse momentum correlations enable measurements of the collision dynamics sensitive to momentum currents. Their evolution with collision centrality, which is related to the system lifetime, provides information about the shear viscosity, $\eta / s$, and the system relaxation time, $_{T\pi }$ . We report on measurements of two-particle transverse momentum correlations as a function of centrality in Pb-Pb collisions using the ALICE detector at the LHC. The centrality dependence of the near-side peak of the correlation function, particularly in the longitudinal dimension, provides information about the shear viscosity and the system relaxation time of the produced medium. The data are compared to predictions from selected Monte Carlo models. The charge independent momentum correlator exhibits a longitudinal broadening from peripheral to central collisions that is qualitatively consistent with expectations from a model with viscous effects. We will discuss an interpretation of the observed broadening in the context of this model. |
id | oai-inspirehep.net-1813141 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2020 |
record_format | invenio |
spelling | oai-inspirehep.net-18131412022-11-17T14:32:53Zdoi:10.1088/1742-6596/1602/1/012010http://cds.cern.ch/record/2749162engGonzález, V íctorCharacterizing the medium created in Pb–Pb collisions at by means of the evolution of two-particle transverse momentum correlationsNuclear Physics - ExperimentNuclear Physics - TheoryTwo-particle correlations are powerful tools for studying the medium produced in heavy-ion collisions. In particular, two-particle transverse momentum correlations enable measurements of the collision dynamics sensitive to momentum currents. Their evolution with collision centrality, which is related to the system lifetime, provides information about the shear viscosity, $\eta / s$, and the system relaxation time, $_{T\pi }$ . We report on measurements of two-particle transverse momentum correlations as a function of centrality in Pb-Pb collisions using the ALICE detector at the LHC. The centrality dependence of the near-side peak of the correlation function, particularly in the longitudinal dimension, provides information about the shear viscosity and the system relaxation time of the produced medium. The data are compared to predictions from selected Monte Carlo models. The charge independent momentum correlator exhibits a longitudinal broadening from peripheral to central collisions that is qualitatively consistent with expectations from a model with viscous effects. We will discuss an interpretation of the observed broadening in the context of this model.oai:inspirehep.net:18131412020 |
spellingShingle | Nuclear Physics - Experiment Nuclear Physics - Theory González, V íctor Characterizing the medium created in Pb–Pb collisions at by means of the evolution of two-particle transverse momentum correlations |
title | Characterizing the medium created in Pb–Pb collisions at by means of the evolution of two-particle transverse momentum correlations |
title_full | Characterizing the medium created in Pb–Pb collisions at by means of the evolution of two-particle transverse momentum correlations |
title_fullStr | Characterizing the medium created in Pb–Pb collisions at by means of the evolution of two-particle transverse momentum correlations |
title_full_unstemmed | Characterizing the medium created in Pb–Pb collisions at by means of the evolution of two-particle transverse momentum correlations |
title_short | Characterizing the medium created in Pb–Pb collisions at by means of the evolution of two-particle transverse momentum correlations |
title_sort | characterizing the medium created in pb–pb collisions at by means of the evolution of two-particle transverse momentum correlations |
topic | Nuclear Physics - Experiment Nuclear Physics - Theory |
url | https://dx.doi.org/10.1088/1742-6596/1602/1/012010 http://cds.cern.ch/record/2749162 |
work_keys_str_mv | AT gonzalezvictor characterizingthemediumcreatedinpbpbcollisionsatbymeansoftheevolutionoftwoparticletransversemomentumcorrelations |