QCD热点问题集群扩展的实现

IF 1.7 4区物理与天体物理 Q2 PHYSICS, NUCLEAR

Nuclear Physics A Pub Date : 2023-10-01 DOI:10.1016/j.nuclphysa.2023.122718

Niels-Uwe Friedrich Bastian , Pasi Huovinen , Elizaveta Nazarova

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引用次数: 0

摘要

我们提出了一个基于广义Beth-Uhlenbeck形式的强相互作用物质的团簇扩展EoS模型，将强子描述为夸克的束缚团簇。这种形式主义既可以描述约束阶段，也可以描述去约束阶段。我们的重点是重子密度消失的区域，Lattice QCD提供的数值解预测了从强子到夸克物质的平滑交叉跃迁。介质效应被视为自能，其动机来自微扰QCD计算和唯象模型。参数被调整到晶格QCD数据，并导致热力学的良好一致性。

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Implementation of cluster expansion for hot QCD matter

We present a cluster expansion EoS model for strongly-interacting matter based on the generalized Beth-Uhlenbeck formalism to describe hadrons as bound clusters of quarks. This formalism can describe both confined and deconfined phases. Our emphasis is on the region of vanishing baryon densities, where numerical solutions available from Lattice QCD predict a smooth crossover transition from hadron to quark matter. Medium effects are taken into account as self energies, which are motivated from both perturbative QCD calculations and phenomenological models. Parameters are tuned to Lattice QCD data and result in a good agreement of the thermodynamics.

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来源期刊

Nuclear Physics A 物理-物理：核物理

CiteScore

3.60

自引率

7.10%

发文量

113

审稿时长

61 days

期刊介绍： Nuclear Physics A focuses on the domain of nuclear and hadronic physics and includes the following subsections: Nuclear Structure and Dynamics; Intermediate and High Energy Heavy Ion Physics; Hadronic Physics; Electromagnetic and Weak Interactions; Nuclear Astrophysics. The emphasis is on original research papers. A number of carefully selected and reviewed conference proceedings are published as an integral part of the journal.