Toward a description of the centrality dependence of the charge balance function in the HYDJET++model
作者机构:Skobeltsyn Institute of Nuclear PhysicsLomonosov Moscow State UniversityRU-119991 MoscowRussia Bogoliubov Laboratory of Theoretical PhysicsJINRRU-141980 DubnaRussia Department of PhysicsUniversity of OsloN-0316 OsloNorwa
出 版 物:《Chinese Physics C》 (中国物理C(英文版))
年 卷 期:2023年第47卷第8期
页 面:107-114页
核心收录:
学科分类:07[理学] 08[工学] 0827[工学-核科学与技术] 082701[工学-核能科学与工程] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学]
主 题:relativistic heavy-ion collisions charge balance function soft and hard processes canonical charge conservation
摘 要:Data from the Large Hadron Collider on the charge balance function in Pb+Pb collisions at center-of-mass energy 2.76 TeV per nucleon pair are analyzed and interpreted within the framework of the HYDJET++*** model allows us to qualitatively reproduce the experimentally observed centrality dependence of the balance function widths at relatively low transverse momentum intervals due to the different charge creation mechanisms in soft and hard ***,a fully adequate description of the balance function in these intervals implies an essential modification of the model by including exact charge conservation via the canonical rather than the grand canonical ensemble.A procedure is proposed for introducing charge correlations into the thermal model without changing other model *** increasing transverse momenta,the default model results describe the exper-imental data much better because the contribution of the soft component of the model is significantly reduced in these transverse momentum *** practical terms,there is a transition to a single source of charge correlations,namely,charge correlations in jets in which exact charge conservation holds at each stage.