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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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Autor principal: Rybczyński, Maciej
Lenguaje:eng
Publicado: 2014
Materias:
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.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2014
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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