Energy Dependence of High Moments for Net-proton Distributions

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High moments of multiplicity distributions of conserved quantities are predicted to be sensitive to critical fluctuations. To understand the effect of the non-critical physics backgrounds on the proposed observable, we have studied various moments of net-proton distributions with AMPT, Hijing, Therminator and UrQMD models, in which no QCD critical point physics is implemented. It is found that the centrality evolution of various moments of net-proton distributions can be uniformly described by a superposition of emission sources. In addition, in the absence of critical phenomena, some moment products of net-proton distributions, related to the baryon number susceptibilities in Lattice QCD calculations, ... continued below

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Luo, Xiaofeng; Mohanty, Bedangadas; Ritter, Hans Georg & Xu, Nu July 7, 2010.

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High moments of multiplicity distributions of conserved quantities are predicted to be sensitive to critical fluctuations. To understand the effect of the non-critical physics backgrounds on the proposed observable, we have studied various moments of net-proton distributions with AMPT, Hijing, Therminator and UrQMD models, in which no QCD critical point physics is implemented. It is found that the centrality evolution of various moments of net-proton distributions can be uniformly described by a superposition of emission sources. In addition, in the absence of critical phenomena, some moment products of net-proton distributions, related to the baryon number susceptibilities in Lattice QCD calculations, are predicted to be constant as a function of the collision centrality. We argue that a non-monotonic dependence of the moment products as a function of the beam energy may be used to locate the QCD critical point.

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  • Journal Name: Physical Review Letter

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  • Report No.: LBNL-3787E
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 986234
  • Archival Resource Key: ark:/67531/metadc1015464

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  • July 7, 2010

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  • Oct. 14, 2017, 8:36 a.m.

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  • Oct. 17, 2017, 8:13 p.m.

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Luo, Xiaofeng; Mohanty, Bedangadas; Ritter, Hans Georg & Xu, Nu. Energy Dependence of High Moments for Net-proton Distributions, article, July 7, 2010; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc1015464/: accessed April 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.