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Onset of deconfinement and search for the critical point of strongly interacting matter at CERN SPS energies
The exploration of the QCD phase diagram particularly the search for a phase transition from hadronic to partonic degrees of freedom and possibly a critical endpoint, is one of the most challenging tasks in present heavy-ion physics. As observed by the NA49 experiment, several hadronic observables i...
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Lenguaje: | eng |
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2014
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Acceso en línea: | https://dx.doi.org/10.22323/1.180.0192 http://cds.cern.ch/record/2003057 |
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author | Rybczyński, Maciej |
author_facet | Rybczyński, Maciej |
author_sort | Rybczyński, Maciej |
collection | CERN |
description | The exploration of the QCD phase diagram particularly the search for a phase transition from hadronic to partonic degrees of freedom and possibly a critical endpoint, is one of the most challenging tasks in present heavy-ion physics. As observed by the NA49 experiment, several hadronic observables in central Pb+Pb collisions at the CERN SPS show qualitative changes in their energy dependence. These features are not observed in elementary interactions and indi- cate the onset of a phase transition in the SPS energy range. The existence of a critical point is expected to result in the increase of event-by-event fluctuations of various hadronic observables provided that the freeze-out of the measured hadrons occurs close to its location in the phase di- agram and the evolution of the final hadron phase does not erase the fluctuations signals. Further information about the existence and nature of a phase transition in the SPS energy range can be gained from the studies of event-by-event fluctuations of final state hadron distributions and yields performed by NA61/SHINE, the successor of the NA49 experiment. Experimental results from both experiments on event-by-event fluctuations of transverse-momentum, multiplicity as well as low mass pion pair and proton number fluctuations are shown as a function of beam energy and system size. |
id | oai-inspirehep.net-1290638 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2014 |
record_format | invenio |
spelling | oai-inspirehep.net-12906382019-09-30T06:29:59Zdoi:10.22323/1.180.0192http://cds.cern.ch/record/2003057engRybczyński, MaciejOnset of deconfinement and search for the critical point of strongly interacting matter at CERN SPS energiesParticle Physics - ExperimentThe exploration of the QCD phase diagram particularly the search for a phase transition from hadronic to partonic degrees of freedom and possibly a critical endpoint, is one of the most challenging tasks in present heavy-ion physics. As observed by the NA49 experiment, several hadronic observables in central Pb+Pb collisions at the CERN SPS show qualitative changes in their energy dependence. These features are not observed in elementary interactions and indi- cate the onset of a phase transition in the SPS energy range. The existence of a critical point is expected to result in the increase of event-by-event fluctuations of various hadronic observables provided that the freeze-out of the measured hadrons occurs close to its location in the phase di- agram and the evolution of the final hadron phase does not erase the fluctuations signals. Further information about the existence and nature of a phase transition in the SPS energy range can be gained from the studies of event-by-event fluctuations of final state hadron distributions and yields performed by NA61/SHINE, the successor of the NA49 experiment. Experimental results from both experiments on event-by-event fluctuations of transverse-momentum, multiplicity as well as low mass pion pair and proton number fluctuations are shown as a function of beam energy and system size.oai:inspirehep.net:12906382014 |
spellingShingle | Particle Physics - Experiment Rybczyński, Maciej Onset of deconfinement and search for the critical point of strongly interacting matter at CERN SPS energies |
title | Onset of deconfinement and search for the critical point of strongly interacting matter at CERN SPS energies |
title_full | Onset of deconfinement and search for the critical point of strongly interacting matter at CERN SPS energies |
title_fullStr | Onset of deconfinement and search for the critical point of strongly interacting matter at CERN SPS energies |
title_full_unstemmed | Onset of deconfinement and search for the critical point of strongly interacting matter at CERN SPS energies |
title_short | Onset of deconfinement and search for the critical point of strongly interacting matter at CERN SPS energies |
title_sort | onset of deconfinement and search for the critical point of strongly interacting matter at cern sps energies |
topic | Particle Physics - Experiment |
url | https://dx.doi.org/10.22323/1.180.0192 http://cds.cern.ch/record/2003057 |
work_keys_str_mv | AT rybczynskimaciej onsetofdeconfinementandsearchforthecriticalpointofstronglyinteractingmatteratcernspsenergies |