Scaling Properties of Multiplicity Fluctuations in the AMPT Model
From the events generated from the MC code of a multiphase transport (AMPT) model with string melting, the properties of multiplicity fluctuations of charged particles in Pb–Pb collisions at sNN = 2.76 TeV are studied. Normalized factorial moments, Fq, of spatial distributions of the particles have...
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Wiley
2018-01-01
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| Series: | Advances in High Energy Physics |
| Online Access: | http://dx.doi.org/10.1155/2018/6283801 |
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| author | Rohni Sharma Ramni Gupta |
| author_facet | Rohni Sharma Ramni Gupta |
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| description | From the events generated from the MC code of a multiphase transport (AMPT) model with string melting, the properties of multiplicity fluctuations of charged particles in Pb–Pb collisions at sNN = 2.76 TeV are studied. Normalized factorial moments, Fq, of spatial distributions of the particles have been determined in the framework of intermittency. Those moments are found in some kinematic regions to exhibit scaling behavior at small bin sizes, but not in most regions. However, in relating Fq to F2 scaling behavior is found in nearly all regions. The corresponding scaling exponents, ν, determined in the low transverse momentum (pT) region ≤ 1.0 GeV/c are observed to be independent of the pT bin position and width. The value of ν is found to be larger than 1.304, which is the value that characterizes the Ginzburg-Landau type second-order phase transition. Thus there is no known signature for phase transition in the AMPT model. This study demonstrates that, for the system under investigation, the method of analysis is effective in extracting features that are relevant to the question of whether the dynamical processes leading phase transition are there or not. |
| format | Article |
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| institution | Kabale University |
| issn | 1687-7357 1687-7365 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
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| series | Advances in High Energy Physics |
| spelling | doaj-art-a3bf4dc262074efaa27d96c05629275f2025-02-03T01:06:43ZengWileyAdvances in High Energy Physics1687-73571687-73652018-01-01201810.1155/2018/62838016283801Scaling Properties of Multiplicity Fluctuations in the AMPT ModelRohni Sharma0Ramni Gupta1Department of Physics, University of Jammu, Jammu and Kashmir, IndiaDepartment of Physics, University of Jammu, Jammu and Kashmir, IndiaFrom the events generated from the MC code of a multiphase transport (AMPT) model with string melting, the properties of multiplicity fluctuations of charged particles in Pb–Pb collisions at sNN = 2.76 TeV are studied. Normalized factorial moments, Fq, of spatial distributions of the particles have been determined in the framework of intermittency. Those moments are found in some kinematic regions to exhibit scaling behavior at small bin sizes, but not in most regions. However, in relating Fq to F2 scaling behavior is found in nearly all regions. The corresponding scaling exponents, ν, determined in the low transverse momentum (pT) region ≤ 1.0 GeV/c are observed to be independent of the pT bin position and width. The value of ν is found to be larger than 1.304, which is the value that characterizes the Ginzburg-Landau type second-order phase transition. Thus there is no known signature for phase transition in the AMPT model. This study demonstrates that, for the system under investigation, the method of analysis is effective in extracting features that are relevant to the question of whether the dynamical processes leading phase transition are there or not.http://dx.doi.org/10.1155/2018/6283801 |
| spellingShingle | Rohni Sharma Ramni Gupta Scaling Properties of Multiplicity Fluctuations in the AMPT Model Advances in High Energy Physics |
| title | Scaling Properties of Multiplicity Fluctuations in the AMPT Model |
| title_full | Scaling Properties of Multiplicity Fluctuations in the AMPT Model |
| title_fullStr | Scaling Properties of Multiplicity Fluctuations in the AMPT Model |
| title_full_unstemmed | Scaling Properties of Multiplicity Fluctuations in the AMPT Model |
| title_short | Scaling Properties of Multiplicity Fluctuations in the AMPT Model |
| title_sort | scaling properties of multiplicity fluctuations in the ampt model |
| url | http://dx.doi.org/10.1155/2018/6283801 |
| work_keys_str_mv | AT rohnisharma scalingpropertiesofmultiplicityfluctuationsintheamptmodel AT ramnigupta scalingpropertiesofmultiplicityfluctuationsintheamptmodel |