Pseudorapidity dependence of multiplicity and transverse momentum fluctuations in pp collisions at SPS energies

A search for the critical behavior of strongly interacting matter was performed at the NA61/SHINE experiment by studying event-by-event fluctuations of multiplicity and transverse momentum of charged hadrons produced in inelastic p+p collisions at 20, 31, 40, 80 and 158 GeV/c beam momentum. Results...

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Autor principal: Prokhorova, Daria
Lenguaje:eng
Publicado: 2018
Materias:
Acceso en línea:https://dx.doi.org/10.18502/ken.v3i1.1747
http://cds.cern.ch/record/2301679
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author Prokhorova, Daria
author_facet Prokhorova, Daria
author_sort Prokhorova, Daria
collection CERN
description A search for the critical behavior of strongly interacting matter was performed at the NA61/SHINE experiment by studying event-by-event fluctuations of multiplicity and transverse momentum of charged hadrons produced in inelastic p+p collisions at 20, 31, 40, 80 and 158 GeV/c beam momentum. Results for the energy dependence of the scaled variance of the multiplicity distribution and for two families of strongly intensive measures of multiplicity and transverse momentum fluctuations Δ[PT,N] and Σ[PT,N] are presented. These quantities were studied in different pseudorapidity intervals, which correspond to changing the baryon chemical potential and the temperature at the freeze-out stage. The strongly intensive measures Δ[NF,NB] and Σ[NF,NB] were also used in the analysis of short- and long-range multiplicity correlations. Results on multiplicity and transverse momentum fluctuations significantly depend on the charges of the selected hadrons and the width and/or location of pseudorapidity intervals. The event generator EPOS does not describe the data for the Δ[PT,N] measure, but provides a fair description of Σ[PT,N] . The measure Σ[NF,NB] of forward-backward fluctuations is reproduced reasonably well by the EPOS model.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2018
record_format invenio
spelling cern-23016792023-03-14T18:37:11Zdoi:10.18502/ken.v3i1.1747http://cds.cern.ch/record/2301679engProkhorova, DariaPseudorapidity dependence of multiplicity and transverse momentum fluctuations in pp collisions at SPS energiesnucl-exNuclear Physics - ExperimentA search for the critical behavior of strongly interacting matter was performed at the NA61/SHINE experiment by studying event-by-event fluctuations of multiplicity and transverse momentum of charged hadrons produced in inelastic p+p collisions at 20, 31, 40, 80 and 158 GeV/c beam momentum. Results for the energy dependence of the scaled variance of the multiplicity distribution and for two families of strongly intensive measures of multiplicity and transverse momentum fluctuations Δ[PT,N] and Σ[PT,N] are presented. These quantities were studied in different pseudorapidity intervals, which correspond to changing the baryon chemical potential and the temperature at the freeze-out stage. The strongly intensive measures Δ[NF,NB] and Σ[NF,NB] were also used in the analysis of short- and long-range multiplicity correlations. Results on multiplicity and transverse momentum fluctuations significantly depend on the charges of the selected hadrons and the width and/or location of pseudorapidity intervals. The event generator EPOS does not describe the data for the Δ[PT,N] measure, but provides a fair description of Σ[PT,N] . The measure Σ[NF,NB] of forward-backward fluctuations is reproduced reasonably well by the EPOS model.A search for the critical behavior of strongly interacting matter was performed at the NA61/SHINE experiment by studying event-by-event fluctuations of multiplicity and transverse momentum of charged hadrons produced in inelastic p+p collisions at 20, 31, 40, 80 and 158 GeV/c beam momentum. Results for the energy dependence of the scaled variance of the multiplicity distribution and for two families of strongly intensive measures of multiplicity and transverse momentum fluctuations $\Delta[P_{T},N]$ and $\Sigma[P_{T},N]$ are presented. These quantities were studied in different pseudorapidity intervals, which correspond to changing the baryon chemical potential and the temperature at the freeze-out stage. The strongly intensive measures $\Delta[N_{F},N_{B}]$ and $\Sigma[N_{F},N_{B}]$ were also used in the analysis of short- and long-range multiplicity correlations. Results on multiplicity and transverse momentum fluctuations significantly depend on the charges of the selected hadrons and the width and/or location of pseudorapidity intervals. The event generator EPOS does not describe the data for the $\Delta[P_{T},N]$ measure, but provides a fair description of $\Sigma[P_{T},N]$. The measure $\Sigma[N_{F},N_{B}]$ of forward-backward fluctuations is reproduced reasonably well by the EPOS model.arXiv:1801.06690oai:cds.cern.ch:23016792018-01-20
spellingShingle nucl-ex
Nuclear Physics - Experiment
Prokhorova, Daria
Pseudorapidity dependence of multiplicity and transverse momentum fluctuations in pp collisions at SPS energies
title Pseudorapidity dependence of multiplicity and transverse momentum fluctuations in pp collisions at SPS energies
title_full Pseudorapidity dependence of multiplicity and transverse momentum fluctuations in pp collisions at SPS energies
title_fullStr Pseudorapidity dependence of multiplicity and transverse momentum fluctuations in pp collisions at SPS energies
title_full_unstemmed Pseudorapidity dependence of multiplicity and transverse momentum fluctuations in pp collisions at SPS energies
title_short Pseudorapidity dependence of multiplicity and transverse momentum fluctuations in pp collisions at SPS energies
title_sort pseudorapidity dependence of multiplicity and transverse momentum fluctuations in pp collisions at sps energies
topic nucl-ex
Nuclear Physics - Experiment
url https://dx.doi.org/10.18502/ken.v3i1.1747
http://cds.cern.ch/record/2301679
work_keys_str_mv AT prokhorovadaria pseudorapiditydependenceofmultiplicityandtransversemomentumfluctuationsinppcollisionsatspsenergies