Impact of single string structure and multiple string interaction on strangeness production in Pb+Pb collisions at $\sqrt{S_{NN}} = 2.76$ TeV

TL;DR

This study uses the PACIAE model to analyze how single string structures and multiple string interactions affect strangeness production in high-energy Pb+Pb collisions, showing that variable string tension improves agreement with experimental data.

Contribution

It introduces a modified PACIAE model with variable string tension to better reproduce strangeness production in heavy-ion collisions.

Findings

Enhanced strange particle yields with variable string tension.

Improved model agreement with ALICE experimental data.

String tension variations significantly impact strangeness production.

Abstract

We present a systematic study on the strange and multi-strange particles production in Pb+Pb collisions at $\sqrt{S_{NN}} = 2.76$ TeV based on the PACIAE model simulations. Two different mechanisms, namely the single string structure variations and multiple string interactions, are implemented in the simulations. These modifications give rise to an enhancement of the string tension value involved in the Lund string fragmentation framework and generate more strange particles in the hadronic final state. By comparing the simulation results with the ALICE experimental data, it turns out that the inclusion of the variable effective string tension in the PACIAE model is capable to reach an improved agreement between theory and experiment on the strangeness production in Pb+Pb collisions.