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An introduction to the parton and hadron cascade model PACIAE 3.0

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arxiv 2309.05110 v1 pith:D33CTNZC submitted 2023-09-10 hep-ph nucl-th

classification hep-phnucl-th
keywords paciaemodelcascadedefinitiondistributionenergyhadronparton
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

We introduce a parton and hadron cascade model PACIAE 3.0 based on PYTHIA 6.428 and the PACIAE 2.2 program series. The simulation framework of C-, B-, and A-loops are designed for the high energy ($\sqrt{s_{NN}}\geq 3$ GeV) and low energy ($\sqrt{s_{NN}}<3$ GeV) nuclear collisions, respectively, in PACIAE 3.0. In the C-loop simulation, the parton-parton inelastic scattering processes are added in the partonic rescattering process. The single string structure and multiple string interaction mechanism have been introduced investigating the strangeness enhancement in C- and B-loop. An improved mapping relation between the centrality percentage definition and the impact parameter definition is proposed responding the observation of $b_{max}\approx 20$ fm from ALICE, ATLAS, and CMS collaborations. We have extensively modified the phenomenological coalescence hadronization model. The PACIAE 3.0 model simulated results of particle yield, transverse momentum distribution, and rapidity distribution well reproduce, respectively, the experimental data measured at FOPI, E895, RHIC, and LHC energies.

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  1. A Brief Introduction to PACIAE 4.0

    hep-ph 2024-11 conditional novelty 6.0 of 10

    PACIAE 4.0 is a new public release of an event generator that adds PYTHIA 8.3 support, heavy-quark mass corrections, an improved coalescence model, and new hadron channels, but no validation is shown.

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