发表机构
Niigata University; RIKEN Center for Interdisciplinary Theoretical and Mathematical Sciences (iTHEMS), RIKEN; University of Houston（新潟大学; 理化学研究所交叉理论与数学科学中心（iTHEMS）; 休斯顿大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
该研究用带排斥相互作用的禁闭弦气体描述中间温度QCD热力学，通过排除体积修正拟合晶格数据，确定哈格多恩温度约300 MeV及介子、重子排除体积参数，揭示重子扇区需更强抑制。
AI 中文摘要
我们研究了中间温度区域内的QCD热力学，采用禁闭弦气体并辅以排除体积（EV）修正。在该描述中，离散的强子共振谱被一个指数增长的开放弦谱所取代，该谱以哈格多恩温度$T_H$为特征，$T_H$与禁闭弦张力相关。通过介子和重子共享一个共同的EV参数，该模型能够很好地描述赝临界温度以上的晶格QCD体热力学。在所考虑的值中，$T_H \simeq 300\\,\text{MeV}$给出了最佳一致性，低于从理想弦气体拟合真空强子谱所推断的$T_H \simeq 320\\!-\\!340\\,\text{MeV}$。对介子和重子EV参数的同时校准给出$b_M \simeq 0.19\\,\text{fm}^3$和$b_B \simeq 0.73\\,\text{fm}^3$。在当前谱假设下，较大的重子EV参数表明在重子扇区需要更强的有效抑制，尽管在几个守恒荷观测量中仍存在明显的张力。
英文摘要
We investigate QCD thermodynamics in the intermediate-temperature regime using a gas of confining strings supplemented by excluded volume (EV) corrections. In this description, the discrete hadron resonance spectrum is replaced by an exponentially growing open-string spectrum characterized by a Hagedorn temperature $T_H$, related to the confining string tension. With a common EV parameter shared by mesons and baryons, the model gives a good description of bulk lattice-QCD thermodynamics above the pseudocritical temperature. Among the values considered, $T_H \simeq 300\,\text{MeV}$ provides the best agreement, lower than the value $T_H \simeq 320\!-\!340\,\text{MeV}$ inferred from ideal-string-gas fits to the vacuum hadron spectrum. A simultaneous calibration of the mesonic and baryonic EV parameters gives $b_M \simeq 0.19\,\text{fm}^3$ and $b_B \simeq 0.73\,\text{fm}^3$. Within the present spectral ansatz, the larger baryonic EV parameter indicates that stronger effective suppression is required in the baryon sector, although noticeable tensions remain in several conserved-charge observables.
Comments12 pages, 6 figures
