Transverse momentum spectra of proton, deuteron, and triton in gold-gold (Au-Au) collisions at 54.4 GeV are analyzed in different centrality bins by the blast wave model with Tsallis statistics. The model results are approximately in agreement with the experimental data measured by STAR Collaboration in special transverse momentum ranges. We extracted the kinetic freeze-out temperature, transverse flow velocity, and freeze-out volume from the transverse momentum spectra of the particles. It is observed that the kinetic freeze-out temperature is increasing from the central to peripheral collisions. However, the transverse flow velocity and freeze-out volume decrease from the central to peripheral collisions. The present work reveals the mass dependent kinetic freeze-out scenario and volume differential freeze-out scenario in collisions at STAR Collaboration. In addition, parameter characterizes the degree of nonequilibrium of the produced system, and it increases from the central to peripheral collisions and increases with mass .

中文翻译：

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在54.4 GeV下研究质子，氘核和Tri核

利用Tsallis统计，通过爆炸波模型分析了在54.4 GeV处金-金（Au-Au）碰撞中质子，氘核和tri核的横向动量谱。模型结果与STAR Collaboration在特殊横向动量范围内测得的实验数据大致吻合。我们从颗粒的横向动量谱中提取了动力学冻结温度，横向流速和冻结体积。可以观察到，动力学冻结温度从中心碰撞到外围碰撞都在增加。但是，横向流速和冻结体积从中心碰撞到外围碰撞减小。本工作揭示了STAR Collaboration碰撞中质量依赖的动力学冻结情况和体积差异冻结情况。另外，参数 表征了所产生系统的不平衡程度，并且它从中心碰撞到外围碰撞都增加，并且随着质量的增加而增加。