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arXiv 0709.0144nucl-th
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具有内色结构和手征场的火球强子气体的热力学

The thermodynamics for a hadronic gas of fireballs with internal color structures and chiral fields

Ismail Zakout, Carsten Greiner

摘要:

本文详细地讨论了由基本粒子和伴随粒子组成的色单重态气体在$U(N_c)$和$SU(N_c)$群表象中的配分函数。假设组成粒子种类满足各种化学统计。利用袋气探测研究了极端条件下核物质的相变。这些袋子被解释为Hagedorn态,它们是在低于夸克-胶子等离子体的相变点处产生的高激发强子态。强子态密度具有Gross-Witten临界点,并表现出从一个由离散的低位强子质谱粒子主导的强子相到另一个由连续的Hagedorn态主导的强子相的三级相变. Hagedorn阈值生产被发现刚好高于已知的最高实验离散低位强子质谱。随后的Hagedorn相经历了一级退禁闭相变,成为爆炸性的夸克-胶子等离子体。手性相变的作用,在相的离散的低洼质谱和连续Hagedorn质谱也被认为是。发现它在相变图中是至关重要的。替代方案进行了简要讨论的哈格多恩气体经历了更高阶的相变,通过多个过程的内部颜色-味道结构修改。

英文摘要:

The thermodynamical partition function for a gas of color-singlet bags consisting of fundamental and adjoint particles in both $U(N_c)$ and $SU(N_c)$ group representations is reviewed in detail. The constituent particle species are assumed to satisfy various thermodynamical statistics. The gas of bags is probed to study the phase transition for a nuclear matter in the extreme conditions. These bags are interpreted as the Hagedorn states and they are the highly excited hadronic states which are produced below the phase transition point to the quark-gluon plasma. The hadronic density of states has the Gross-Witten critical point and exhibits a third order phase transition from a hadronic phase dominated by the discrete low-lying hadronic mass spectrum particles to another hadronic phase dominated by the continuous Hagedorn states. The Hagedorn threshold production is found just above the highest known experimental discrete low-lying hadronic mass spectrum. The subsequent Hagedorn phase undergoes a first order deconfinement phase transition to an explosive quark-gluon plasma. The role of the chiral phase transition in the phases of the discrete low-lying mass spectrum and the continuous Hagedorn mass spectrum is also considered. It is found crucial in the phase transition diagram. Alternate scenarios are briefly discussed for the Hagedorn gas undergoes a higher order phase transition through multi-processes of internal color-flavor structure modification.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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