Abstract

The contributions of various effects to correlations of the average multiplicity of particles emitted in the forward hemisphere of heavy-ion collisions with the multiplicity of particles emitted in the backward hemisphere (forward–backward correlations) have been comparatively analyzed. It has been shown that the experimentally observed dependence of the strength of such correlations on the centrality of lead–lead ion collisions at the Large Hadron Collider energy \(\sqrt {{{s}_{{NN}}}} \) = 2.76 TeV can be reproduced by the HYDJET++ model if the hydrodynamic particle flow, decay of resonances, and production and suppression of high-energy quarks and gluons in hot matter are taken into account. The dominant mechanism of forward–backward correlations for the most central collisions involves the production and fragmentation of quark–gluon jets.

中文翻译：

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超相对论重离子碰撞中多个粒子的前后相关机制

摘要

比较分析了各种效应对重离子碰撞前半球中发射的粒子平均多样性与后半球中发射的粒子多样性（向前-向后相关性）的相关性的贡献。结果表明，在大强子对撞机能量\（\ sqrt {{{s __ {{NN}}}} \）上，实验观察到的这种相关强度对铅-铅离子碰撞中心性的依赖性。如果考虑水动力粒子流，共振衰减以及热物质中高能夸克和胶子的产生和抑制，则HYDJET ++模型可以重现2.76 TeV。对于最中心的碰撞，前后关联的主要机制涉及夸克-胶子射流的产生和破碎。