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Probing the QCD phase structure using event-by-event fluctuations
Heavy-ion collisions at relativistic energies probe matter at extreme conditions of temperatures and energy densities. The study of event-by-event fluctuations of experimental observables is crucial to probe the QCD phase transition, locate the critical point, and learn about the associated critical...
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Lenguaje: | eng |
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2020
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Acceso en línea: | https://dx.doi.org/10.1088/1742-6596/1602/1/012003 http://cds.cern.ch/record/2729160 |
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author | Nayak, Tapan K. |
author_facet | Nayak, Tapan K. |
author_sort | Nayak, Tapan K. |
collection | CERN |
description | Heavy-ion collisions at relativistic energies probe matter at extreme conditions of temperatures and energy densities. The study of event-by-event fluctuations of experimental observables is crucial to probe the QCD phase transition, locate the critical point, and learn about the associated critical phenomena. At the critical point, all thermodynamic quantities behave anomalously. Fluctuation measurements provide access to thermodynamic response functions. We discuss the methods for obtaining the isothermal compressibility using particle multiplicity fluctuation, and specific heat using fluctuations in mean transverse momentum, temperature, and energy. Lattice QCD calculations have predicted non-monotonic behavior in the higher-order cumulants of conserved quantities at the critical point. Fluctuations in the multiplicity of charged to neutral particles have been measured to understand the formation of domains of disoriented chiral condensates. We review the recent fluctuation results as a function of collision centrality and energy from experiments at SPS, RHIC, and LHC. In addition, we propose to map the temperature fluctuations in η-φ plane to probe local fluctuations of temperature and energy density. |
id | cern-2729160 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2020 |
record_format | invenio |
spelling | cern-27291602021-03-25T03:05:29Zdoi:10.1088/1742-6596/1602/1/012003http://cds.cern.ch/record/2729160engNayak, Tapan K.Probing the QCD phase structure using event-by-event fluctuationsnucl-thNuclear Physics - Theoryhep-phParticle Physics - Phenomenologyhep-exParticle Physics - Experimentnucl-exNuclear Physics - ExperimentHeavy-ion collisions at relativistic energies probe matter at extreme conditions of temperatures and energy densities. The study of event-by-event fluctuations of experimental observables is crucial to probe the QCD phase transition, locate the critical point, and learn about the associated critical phenomena. At the critical point, all thermodynamic quantities behave anomalously. Fluctuation measurements provide access to thermodynamic response functions. We discuss the methods for obtaining the isothermal compressibility using particle multiplicity fluctuation, and specific heat using fluctuations in mean transverse momentum, temperature, and energy. Lattice QCD calculations have predicted non-monotonic behavior in the higher-order cumulants of conserved quantities at the critical point. Fluctuations in the multiplicity of charged to neutral particles have been measured to understand the formation of domains of disoriented chiral condensates. We review the recent fluctuation results as a function of collision centrality and energy from experiments at SPS, RHIC, and LHC. In addition, we propose to map the temperature fluctuations in η-φ plane to probe local fluctuations of temperature and energy density.Heavy-ion collisions at relativistic energies probe matter at extreme conditions of temperatures and energy densities. The study of event-by-event fluctuations of experimental observables is crucial to probe the QCD phase transition, locate the critical point, and learn about the associated critical phenomena. At the critical point, all thermodynamic quantities behave anomalously. Fluctuation measurements provide access to thermodynamic response functions. We discuss the methods for obtaining the isothermal compressibility using particle multiplicity fluctuation, and specific heat using fluctuations in mean transverse momentum, temperature, and energy. Lattice QCD calculations have predicted non-monotonic behavior in the higher-order cumulants of conserved quantities at the critical point. Fluctuations in the multiplicity of charged to neutral particles have been measured to understand the formation of domains of disoriented chiral condensates. We review the recent fluctuation results as a function of collision centrality and energy from experiments at SPS, RHIC, and LHC. In addition, we propose to map the temperature fluctuations in eta-phi plane to probe local fluctuations of temperature and energy density.arXiv:2008.04643oai:cds.cern.ch:27291602020-08-11 |
spellingShingle | nucl-th Nuclear Physics - Theory hep-ph Particle Physics - Phenomenology hep-ex Particle Physics - Experiment nucl-ex Nuclear Physics - Experiment Nayak, Tapan K. Probing the QCD phase structure using event-by-event fluctuations |
title | Probing the QCD phase structure using event-by-event fluctuations |
title_full | Probing the QCD phase structure using event-by-event fluctuations |
title_fullStr | Probing the QCD phase structure using event-by-event fluctuations |
title_full_unstemmed | Probing the QCD phase structure using event-by-event fluctuations |
title_short | Probing the QCD phase structure using event-by-event fluctuations |
title_sort | probing the qcd phase structure using event-by-event fluctuations |
topic | nucl-th Nuclear Physics - Theory hep-ph Particle Physics - Phenomenology hep-ex Particle Physics - Experiment nucl-ex Nuclear Physics - Experiment |
url | https://dx.doi.org/10.1088/1742-6596/1602/1/012003 http://cds.cern.ch/record/2729160 |
work_keys_str_mv | AT nayaktapank probingtheqcdphasestructureusingeventbyeventfluctuations |