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Femtoscopic Proton-Lambda Correlations in Pb-Pb Collisions at $\sqrt {s_{NN}} = $ 2.76 TeV with ALICE

Two-particle correlations at small relative momenta give insight into the size of the emitting source. Of particular interest is the test of hydrodynamic models which predict a universal, apparent decrease of the extent of the system with increasing transverse mass mT as a consequence of the strong...

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Autor principal: Beck, Hans
Lenguaje:eng
Publicado: 2015
Materias:
Acceso en línea:http://cds.cern.ch/record/1984771
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author Beck, Hans
author_facet Beck, Hans
author_sort Beck, Hans
collection CERN
description Two-particle correlations at small relative momenta give insight into the size of the emitting source. Of particular interest is the test of hydrodynamic models which predict a universal, apparent decrease of the extent of the system with increasing transverse mass mT as a consequence of the strong radial flow in heavy-ion collisions at LHC energies. This contribution presents a study of correlations for protons and {\Lambda} particles in Pb-Pb collisions at sqrt(sNN) = 2.76 TeV measured with ALICE. The investigated particle species expand the experimental reach in mT due to their high rest mass. Residual impurities in the samples from misidentification and contributions from feed-down are corrected using data-driven techniques. Correlation functions are obtained in several centrality classes and mT intervals at large mT and show the expected decrease in volume of the strongly interacting fireball for more peripheral collisions. We observe the decrease of the source size with mT, predicted by hydrodynamical calculations, out to mean mT = 2.18 GeV/c2.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2015
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spelling cern-19847712021-07-15T01:02:52Zhttp://cds.cern.ch/record/1984771engBeck, HansFemtoscopic Proton-Lambda Correlations in Pb-Pb Collisions at $\sqrt {s_{NN}} = $ 2.76 TeV with ALICEnucl-exNuclear Physics - ExperimentTwo-particle correlations at small relative momenta give insight into the size of the emitting source. Of particular interest is the test of hydrodynamic models which predict a universal, apparent decrease of the extent of the system with increasing transverse mass mT as a consequence of the strong radial flow in heavy-ion collisions at LHC energies. This contribution presents a study of correlations for protons and {\Lambda} particles in Pb-Pb collisions at sqrt(sNN) = 2.76 TeV measured with ALICE. The investigated particle species expand the experimental reach in mT due to their high rest mass. Residual impurities in the samples from misidentification and contributions from feed-down are corrected using data-driven techniques. Correlation functions are obtained in several centrality classes and mT intervals at large mT and show the expected decrease in volume of the strongly interacting fireball for more peripheral collisions. We observe the decrease of the source size with mT, predicted by hydrodynamical calculations, out to mean mT = 2.18 GeV/c2.arXiv:1502.00848oai:cds.cern.ch:19847712015-02-03
spellingShingle nucl-ex
Nuclear Physics - Experiment
Beck, Hans
Femtoscopic Proton-Lambda Correlations in Pb-Pb Collisions at $\sqrt {s_{NN}} = $ 2.76 TeV with ALICE
title Femtoscopic Proton-Lambda Correlations in Pb-Pb Collisions at $\sqrt {s_{NN}} = $ 2.76 TeV with ALICE
title_full Femtoscopic Proton-Lambda Correlations in Pb-Pb Collisions at $\sqrt {s_{NN}} = $ 2.76 TeV with ALICE
title_fullStr Femtoscopic Proton-Lambda Correlations in Pb-Pb Collisions at $\sqrt {s_{NN}} = $ 2.76 TeV with ALICE
title_full_unstemmed Femtoscopic Proton-Lambda Correlations in Pb-Pb Collisions at $\sqrt {s_{NN}} = $ 2.76 TeV with ALICE
title_short Femtoscopic Proton-Lambda Correlations in Pb-Pb Collisions at $\sqrt {s_{NN}} = $ 2.76 TeV with ALICE
title_sort femtoscopic proton-lambda correlations in pb-pb collisions at $\sqrt {s_{nn}} = $ 2.76 tev with alice
topic nucl-ex
Nuclear Physics - Experiment
url http://cds.cern.ch/record/1984771
work_keys_str_mv AT beckhans femtoscopicprotonlambdacorrelationsinpbpbcollisionsatsqrtsnn276tevwithalice