Multiplicity fluctuation and correlation of mesons and baryons in ultra-relativistic heavy-ion collisions at the LHC

  • We study the multiplicity fluctuation and correlation of identified mesons and baryons formed at hadronization by the quark combination mechanism in the context of ultra-relativistic heavy-ion collisions. Based on the statistical method of free quark combination, we derive the two-hadron multiplicity correlations, including meson-meson and meson-baryon correlations, and take the effects of quark number fluctuation at hadronization into account by a Taylor expansion method. After including the decay contributions, we calculate the dynamical fluctuation observable vdyn for Kπ, pπ and Kp pairs and discuss what underlying physics can be obtained by comparing with data from Pb-Pb collisions at √sNN=2.76 TeV and simulations from the HIJING and AMPT event generators.
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Hai-hong Li, Feng-lan Shao and Jun Song. Multiplicity fluctuation and correlation of mesons and baryons in ultra-relativistic heavy-ion collisions at the LHC[J]. Chinese Physics C, 2018, 42(1): 014102. doi: 10.1088/1674-1137/42/1/014102
Hai-hong Li, Feng-lan Shao and Jun Song. Multiplicity fluctuation and correlation of mesons and baryons in ultra-relativistic heavy-ion collisions at the LHC[J]. Chinese Physics C, 2018, 42(1): 014102.  doi: 10.1088/1674-1137/42/1/014102 shu
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Received: 2017-09-26
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    Supported by National Natural Science Foundation of China (11575100)

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Multiplicity fluctuation and correlation of mesons and baryons in ultra-relativistic heavy-ion collisions at the LHC

    Corresponding author: Feng-lan Shao,
    Corresponding author: Jun Song,
  • 1. School of Physics and Engineering, Qufu Normal University, Shandong 273165, China
  • 2. Department of Physics, Jining University, Shandong 273155, China
  • 3.  School of Physics and Engineering, Qufu Normal University, Shandong 273165, China
  • 4.  Department of Physics, Jining University, Shandong 273155, China
Fund Project:  Supported by National Natural Science Foundation of China (11575100)

Abstract: We study the multiplicity fluctuation and correlation of identified mesons and baryons formed at hadronization by the quark combination mechanism in the context of ultra-relativistic heavy-ion collisions. Based on the statistical method of free quark combination, we derive the two-hadron multiplicity correlations, including meson-meson and meson-baryon correlations, and take the effects of quark number fluctuation at hadronization into account by a Taylor expansion method. After including the decay contributions, we calculate the dynamical fluctuation observable vdyn for Kπ, pπ and Kp pairs and discuss what underlying physics can be obtained by comparing with data from Pb-Pb collisions at √sNN=2.76 TeV and simulations from the HIJING and AMPT event generators.

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