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Fluctuations of identified particle yields using the νdyn variable at energies available at the BNL Relativistic Heavy Ion Collider

Vivek Kumar Singh, Dipak Kumar Mishra, and Zubayer Ahammed
Phys. Rev. C 101, 014903 – Published 6 January 2020
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  • INTRODUCTION
  • ESTIMATION OF νdyn IN DIFFERENT MODELS
  • RESULTS AND DISCUSSION
  • SUMMARY
  • ACKNOWLEDGMENTS
    • References

    Abstract

    We study the fluctuations of net charge, net pion, net kaon, and net proton using the νdyn variable in the heavy-ion jet interaction generator (HIJING), ultrarelativistic quantum molecular dynamics (UrQMD), and hadron resonance gas (HRG) model at different collision energies sNN. It has been observed that the values of νdyn strongly depend on Δη in the HIJING and UrQMD models and are independent in the HRG model. The present work emphasizes the particle species dependence of net charge fluctuation strength and provides a baseline for comparison with the experimental data.

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    • Received 5 July 2019
    • Revised 23 October 2019

    DOI:https://doi.org/10.1103/PhysRevC.101.014903

    Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.

    Published by the American Physical Society

    Physics Subject Headings (PhySH)

    1. Research Areas
    Particle correlations & fluctuationsRelativistic heavy-ion collisions
    Nuclear Physics

    Authors & Affiliations

    Vivek Kumar Singh1,*, Dipak Kumar Mishra2,†, and Zubayer Ahammed1,‡

    • 1Variable Energy Cyclotron Centre, HBNI, 1/AF Bidhannagar, Kolkata 700 064, India
    • 2Nuclear Physics Division, Bhabha Atomic Research Center, Mumbai 400085, India

    • *vkr.singh@vecc.gov.in
    • †dkmishra@barc.gov.in
    • ‡za@vecc.gov.in

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    Issue

    Vol. 101, Iss. 1 — January 2020

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    • Figure 1
      Figure 1

      Fluctuation parameter 〈Nch〉ν(±,dyn) as a function of Δη for net-charge, net-pion, net-kaon, and net-proton fluctuations for (0–5%) centrality in Au+Au collisions at sNN=19.6 GeV with HRG (upper panel), HIJING (middle panel), and UrQMD (lower panel) models. The 〈Nch〉ν(±,dyn) from HRG model calculations for net-charge (solid line), net-π and net-p (dotted lines), net-K (dashed line) without and with resonance (dashed dotted lines) decay. The statistical errors are within symbol size.

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    • Figure 2
      Figure 2

      Collision energy dependence of 〈Nch〉ν(±,dyn) for net-charge, net-pion, net-kaon, and net-proton are calculated using HRG (upper panel), HIJING (middle panel), and UrQMD (lower panel) models for (0–5%) centrality in Au+Au collisions. The 〈Nch〉ν(±,dyn) from HRG model calculations for net-charge (solid line), net-π and net-p (dotted lines), net-K (dashed line) without and with resonance (dashed dotted lines) decay. The statistical errors are within symbol size.

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    • Figure 3
      Figure 3

      The 〈Nch〉ν(±,dyn) for net-charge, net-pion, net-kaon, and net-proton as a function of Δη window for (0–5%) centrality in Au+Au collisions at different sNN in HIJING model. The statistical errors are within symbol size.

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    • Figure 4
      Figure 4

      The 〈Nch〉ν(±,dyn) for net-charge, net-pion, net-kaon, and net-proton as a function of Δη window for (0–5%) centrality in Au+Au collisions at different sNN in UrQMD model. The statistical errors are within symbol size.

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