Hydrodynamic model of heavy-ion collisions with low momentum components

IF 3.4 3区物理与天体物理 Q2 PHYSICS, NUCLEAR

Journal of Physics G: Nuclear and Particle Physics Pub Date : 2023-01-02 DOI:10.1088/1361-6471/ace3e0

A. Monnai

引用次数: 0

Abstract

Relativistic heavy-ion collisions suggest that low momentum regions of the observed particle spectra are thermal and hydrodynamic, while medium-high momentum regions are non-thermal and perturbative. In this study, I construct a hydrodynamic model of heavy-ion collisions by cutting off the medium-high momentum contributions and investigate the phenomenological consequences. Numerical simulations indicate that the temperature of the quark matter can be higher at earlier times owing to the modification of the equation of state. It is also suggested that direct photon elliptic flow can be sensitive to the momentum dependence of thermalization.

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具有低动量分量的重离子碰撞流体动力学模型

相对论重离子碰撞表明，观测到的粒子光谱的低动量区域是热的和流体动力学的，而中高动量区域是非热的和微扰的。在这项研究中，我通过截断中高动量的贡献来构建重离子碰撞的流体动力学模型，并研究其现象学后果。数值模拟表明，由于状态方程的修改，夸克物质的温度在早期可能会更高。还提出直接光子椭圆流可能对热化的动量依赖性敏感。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Physics G: Nuclear and Particle Physics 物理-物理：核物理

CiteScore

7.60

自引率

5.70%

发文量

105

审稿时长

1 months

期刊介绍： Journal of Physics G: Nuclear and Particle Physics (JPhysG) publishes articles on theoretical and experimental topics in all areas of nuclear and particle physics, including nuclear and particle astrophysics. The journal welcomes submissions from any interface area between these fields. All aspects of fundamental nuclear physics research, including: nuclear forces and few-body systems; nuclear structure and nuclear reactions; rare decays and fundamental symmetries; hadronic physics, lattice QCD; heavy-ion physics; hot and dense matter, QCD phase diagram. All aspects of elementary particle physics research, including: high-energy particle physics; neutrino physics; phenomenology and theory; beyond standard model physics; electroweak interactions; fundamental symmetries. All aspects of nuclear and particle astrophysics including: nuclear physics of stars and stellar explosions; nucleosynthesis; nuclear equation of state; astrophysical neutrino physics; cosmic rays; dark matter. JPhysG publishes a variety of article types for the community. As well as high-quality research papers, this includes our prestigious topical review series, focus issues, and the rapid publication of letters.