• Open Access

Constraining the particle production mechanism in Au+Au collisions at sNN=7.7, 27, and 200 GeV using a multiphase transport model

Abhirikshma Nandi, Lokesh Kumar, and Natasha Sharma
Phys. Rev. C 102, 024902 – Published 5 August 2020

Abstract

We study the production of pions, kaons, and (anti)protons using a multiphase transport (AMPT) model in Au+Au collisions at sNN= 7.7, 27, and 200 GeV. We present the centrality and energy dependence of various bulk observables such as invariant yields as a function of transverse momentum pT, particle yields dN/dy, average transverse momentum pT, and various particle ratios, and compare them with experimental data. Both default and string melting (SM) versions of the AMPT model are used with three different sets of initial conditions. We observe that neither the default nor the SM version of the model could consistently describe the centrality dependence of all observables at the above energies with any one set of initial conditions. The energy dependence behavior of the experimental observables for 0–5% central collisions is in general better described by the default AMPT model using the modified hijing parameters for Lund string fragmentation and 3 mb parton scattering cross section. In addition, the kaon production as well as the K/π ratio at 7.7 GeV are underpredicted by the AMPT model.

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  • Received 29 October 2019
  • Revised 12 May 2020
  • Accepted 30 June 2020

DOI:https://doi.org/10.1103/PhysRevC.102.024902

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)

Particles & FieldsNuclear Physics

Authors & Affiliations

Abhirikshma Nandi1, Lokesh Kumar2, and Natasha Sharma2

  • 1Indian Institute of Technology Guwahati, Assam 781039, India
  • 2Department of Physics, Panjab University, Chandigarh 160014, India

Article Text

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Issue

Vol. 102, Iss. 2 — August 2020

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