Strangeness production as a function of charged particle multiplicity in proton-proton collisions

Recent measurements performed in high-multiplicity proton-proton (pp) and proton-lead (p-Pb) collisions have shown features that are reminiscent of those observed in lead-lead (Pb-Pb) collisions. These observations warrant a comprehensive measurement of the production of identified particles. We rep...

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Detalles Bibliográficos
Autor principal: Bianchi, Livio
Lenguaje:eng
Publicado: 2016
Materias:
Particle Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1016/j.nuclphysa.2016.03.005
http://cds.cern.ch/record/2148300
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author Bianchi, Livio
author_facet Bianchi, Livio
author_sort Bianchi, Livio
collection CERN
description Recent measurements performed in high-multiplicity proton-proton (pp) and proton-lead (p-Pb) collisions have shown features that are reminiscent of those observed in lead-lead (Pb-Pb) collisions. These observations warrant a comprehensive measurement of the production of identified particles. We report on the production of \allparts at mid-rapidity measured as a function of multiplicity in pp collisions at $\sqrt{s}$ = 7 TeV with the ALICE experiment. Spectral shapes studied both for individual particles and via particle ratios such as ($\Lambda/K^{0}_{S}$) as a function of $p_{T}$ exhibit an evolution with event multiplicity and the production rates of hyperons are observed to increase more strongly than those of non-strange hadrons. These phenomena are qualitatively similar to the ones observed in p-Pb and Pb-Pb collisions.
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institution Organización Europea para la Investigación Nuclear
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spelling cern-21483002021-05-03T20:08:47Zdoi:10.1016/j.nuclphysa.2016.03.005http://cds.cern.ch/record/2148300engBianchi, LivioStrangeness production as a function of charged particle multiplicity in proton-proton collisionsParticle Physics - ExperimentRecent measurements performed in high-multiplicity proton-proton (pp) and proton-lead (p-Pb) collisions have shown features that are reminiscent of those observed in lead-lead (Pb-Pb) collisions. These observations warrant a comprehensive measurement of the production of identified particles. We report on the production of \allparts at mid-rapidity measured as a function of multiplicity in pp collisions at $\sqrt{s}$ = 7 TeV with the ALICE experiment. Spectral shapes studied both for individual particles and via particle ratios such as ($\Lambda/K^{0}_{S}$) as a function of $p_{T}$ exhibit an evolution with event multiplicity and the production rates of hyperons are observed to increase more strongly than those of non-strange hadrons. These phenomena are qualitatively similar to the ones observed in p-Pb and Pb-Pb collisions.Recent measurements performed in high-multiplicity proton-proton (pp) and proton-lead (p-Pb) collisions have shown features that are reminiscent of those observed in lead-lead (Pb-Pb) collisions. These observations warrant a comprehensive measurement of the production of identified particles. We report on the production of KS0 , Λ, Λ‾ , Ξ± and Ω± at mid-rapidity measured as a function of multiplicity in pp collisions at s=7 TeV with the ALICE experiment. Spectral shapes studied both for individual particles and via particle ratios such as ( Λ/KS0 ) as a function of p T exhibit an evolution with event multiplicity and the production rates of hyperons are observed to increase more strongly than those of non-strange hadrons. These phenomena are qualitatively similar to the ones observed in p-Pb and Pb-Pb collisions.Recent measurements performed in high-multiplicity proton-proton (pp) and proton-lead (p-Pb) collisions have shown features that are reminiscent of those observed in lead-lead (Pb-Pb) collisions. These observations warrant a comprehensive measurement of the production of identified particles. We report on the production of \allparts at mid-rapidity measured as a function of multiplicity in pp collisions at $\sqrt{s}$ = 7 TeV with the ALICE experiment. Spectral shapes studied both for individual particles and via particle ratios such as ($\Lambda/K^{0}_{S}$) as a function of $p_{T}$ exhibit an evolution with event multiplicity and the production rates of hyperons are observed to increase more strongly than those of non-strange hadrons. These phenomena are qualitatively similar to the ones observed in p-Pb and Pb-Pb collisions.arXiv:1604.06736oai:cds.cern.ch:21483002016-04-22
spellingShingle Particle Physics - Experiment
Bianchi, Livio
Strangeness production as a function of charged particle multiplicity in proton-proton collisions
title Strangeness production as a function of charged particle multiplicity in proton-proton collisions
title_full Strangeness production as a function of charged particle multiplicity in proton-proton collisions
title_fullStr Strangeness production as a function of charged particle multiplicity in proton-proton collisions
title_full_unstemmed Strangeness production as a function of charged particle multiplicity in proton-proton collisions
title_short Strangeness production as a function of charged particle multiplicity in proton-proton collisions
title_sort strangeness production as a function of charged particle multiplicity in proton-proton collisions
topic Particle Physics - Experiment
url https://dx.doi.org/10.1016/j.nuclphysa.2016.03.005
http://cds.cern.ch/record/2148300
work_keys_str_mv AT bianchilivio strangenessproductionasafunctionofchargedparticlemultiplicityinprotonprotoncollisions

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