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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Lenguaje: | eng |
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2018
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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. |
id | cern-2301679 |
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 |