Probing Relativistic Heavy-Ion Collisions via Photon Anisotropic Flow Ratios. A Brief Review

IF 1.5 Q2 PHYSICS, MULTIDISCIPLINARY
Physics Pub Date : 2024-05-04 DOI:10.3390/physics6020044
R. Chatterjee, Pingal Dasgupta
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引用次数: 0

Abstract

The anisotropic flow of photons produced in relativistic nuclear collisions is known as a promising observable for studying the initial state and the subsequent evolution of the hot and dense medium formed in such collisions. The investigation of photon anisotropic flow coefficients, vn, has attracted high interest over the last decade, involving both theory and experiment. The thermal emission of photons and their anisotropic flow are found to be highly sensitive to the initial state of the fireball, where even slight modifications can lead to significant variations in the final state results. In contrast, the ratio of photon anisotropic flow stands out as a robust observable, exhibiting minimal sensitivity to the initial conditions. Here, we briefly review the studies of the individual elliptic and triangular flow parameters of photons as well as their ratios and how these parameters serve as valuable probes for investigating the intricacies of the initial state and addressing the challenges posed by the direct photon puzzle.
通过光子各向异性流动比率探测相对论重离子碰撞。简要回顾
众所周知,相对论核碰撞中产生的光子各向异性流是研究这种碰撞中形成的热致密介质的初始状态和随后演变的一个很有前途的观测指标。在过去十年中,对光子各向异性流动系数 vn 的研究引起了理论和实验的高度关注。研究发现,光子的热发射及其各向异性流动对火球的初始状态非常敏感,即使是轻微的改变也会导致最终状态结果的显著变化。相比之下,光子各向异性流的比值则是一种稳健的观测指标,对初始条件的敏感性极低。在此,我们简要回顾了对光子的单个椭圆流和三角流参数及其比率的研究,以及这些参数如何成为研究初始状态的复杂性和解决直接光子之谜所带来的挑战的宝贵探针。
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
Physics
Physics PHYSICS, MULTIDISCIPLINARY-
CiteScore
3.00
自引率
6.20%
发文量
0
审稿时长
10 weeks
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