s夸克物质的边界效应和K介子自相似结构对夸克胶子等离子体-强子相变的影响  

The boundary effect of s quark matter and self-similarity structure influence of K meson on quark-gluon plasma-hadron phase transition

作　　者：戴婷婷 程鸾 丁慧强 张卫宁[1] 王恩科 DAI Tingting;CHENG Luan;DING Huiqiang;ZHANG Weining;WANG Enke(School of Physics,Dalian University of Technology,Dalian 116024,China;Institute of Quantum Matter,South China Normal University,Guangzhou 510631,China)

机构地区：[1]大连理工大学物理学院,大连116024 [2]华南师范大学量子物质研究院,广州510631

出　　处：《物理学报》2025年第5期25-38,共14页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:12175031);广东省核物质科学与技术重点实验室(批准号:2019B121203010)资助的课题.

摘　　要：聚焦于小尺度夸克物质的边界效应和强子气体中强子的自相似结构对夸克胶子等离子体(QGP)-强子相变的影响,采用多级反射展开方法研究了包含夸克的QGP热滴的边界效应.通过计算发现在边界效应的影响下,小尺度夸克物质相较于热力学极限条件下具有更低的能量密度、熵密度和压强.在强子相中,介子在集体流、量子关联和强相互作用的影响下,与相邻π介子形成两体自相似结构.通过两体分形模型对介子的自相似结构影响计算得出,介子的自相似结构存在于碰撞系统中,导致介子的能量密度、熵密度和压强增大.本研究预测在低能碰撞HIAF能区,介子的自相似结构影响因子q1=1.042.考虑边界效应和,π介子的自相似结构对相变的影响,计算发现夸克物质在边界效应与自相似结构的影响下相变温度均有所升高.若夸克物质的边界弯曲程度较大,则相变温度的升幅相较于自相似结构的影响更明显.We investigate the boundary effect of small-scale s quark matter and the self-similarity structure influence of strange hadrons in the hadron gas on quark-gluon plasma(QGP)-hadron phase transition.In this study,the multiple reflection expansion method is used to investigate the boundary effect of QGP droplets containing s quarks.The calculation reveals that under the influence of boundary effect,small-scale s quark matter exhibits that energy density,entropy density,and pressure are all lower.In the hadron phase,there exists a two-body self-similarity structure between K mesons and neighboringπmesons,subjected to collective flow,quantum correlations,and strong interactions.By using two-body fractal model to study the self-similarity structure of the K meson in meson and quark aspects,it is found that the self-similarity structure of the K meson exists in hadron phase,resluting in an increase in the energy density,entropy density,and pressure of the K meson.Furthermore,under the influence of self-similarity structure,the derived transverse momentum spectrum of K meson shows excellent agreement with experimental data(Fig.(a)).This study predicts that in the HIAF energy region,the self-similarity structure factor of K meson approaches 1.042.Additionaly,under the combined influence of boundary effects and self-similarity structure of K andπmesons,the phase transition temperature of s quark matter increases(Fig.(b)).Morover,if the boundary of s quark matter is more curved,the increase of phase transition temperature becomes more pronounced compared to the effect of self-similarity structure alone.

关 键 词：s夸克 边界效应 自相似结构 量子色动力学相变 

分 类 号：O57[理学—粒子物理与原子核物理]