Impact of glasma on heavy flavor azimuthal correlations and spectra

IF 5 2区物理与天体物理 Q1 Physics and Astronomy

Physical Review D Pub Date : 2025-04-29 DOI:10.1103/physrevd.111.074036

Dana Avramescu, Vincenzo Greco, Tuomas Lappi, Heikki Mäntysaari, David Müller

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引用次数: 0

Abstract

We study the phenomenological impact of the preequilibrium glasma initial stage of heavy-ion collisions on heavy quark azimuthal correlations and spectra. Using our numerical solver, we simulate the transport of heavy quark test particles in an SU(3) glasma background field. The glasma field equations are formulated using classical real-time lattice gauge theory, and the heavy quark dynamics are described by classical transport equations numerically solved using the colored particle-in-cell method. For the first time, the effect of the glasma stage on the azimuthal correlations of cc¯ and bb¯ pairs is studied. The resulting azimuthal width σΔϕ exhibits a large and quick decorrelation due to the strong glasma fields. Further, we evaluate how the pT-broadening in the glasma affects heavy quark pT-spectra, which are initialized according to the Fixed-Order Next-to-Leading Logarithm (FONLL) heavy quark production calculation. The nuclear modification factor RAA is extracted for c and b quarks in the glasma and additional nuclear PDF effects accounting for gluon shadowing are included.

Published by the American Physical Society

2025

查看原文本刊更多论文

等离子体对重味方位角相关性和光谱的影响

我们研究了重离子碰撞前平衡等离子体初始阶段对重夸克方位角相关和谱的现象学影响。利用我们的数值解算器，模拟了重夸克测试粒子在SU(3)等离子体背景场中的输运。用经典实时点阵规范理论建立了等离子体场方程，用经典输运方程描述了重夸克动力学，用彩色粒子胞内法进行了数值求解。首次研究了等离子体阶段对cc¯和bb¯对方位相关性的影响。由于强等离子体场的作用，得到的方位角宽度σΔϕ呈现出大而快速的去相关。此外，我们评估了等离子体中pt展宽对重夸克pt光谱的影响，该光谱是根据固定阶次前导对数（FONLL）重夸克产生计算初始化的。提取了等离子体中c和b夸克的核修饰因子RAA，并包含了考虑胶子遮蔽的附加核PDF效应。2025年由美国物理学会出版

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来源期刊

Physical Review D 物理-天文与天体物理

CiteScore

9.20

自引率

36.00%

发文量

审稿时长

2 months

期刊介绍： Physical Review D (PRD) is a leading journal in elementary particle physics, field theory, gravitation, and cosmology and is one of the top-cited journals in high-energy physics. PRD covers experimental and theoretical results in all aspects of particle physics, field theory, gravitation and cosmology, including: Particle physics experiments, Electroweak interactions, Strong interactions, Lattice field theories, lattice QCD, Beyond the standard model physics, Phenomenological aspects of field theory, general methods, Gravity, cosmology, cosmic rays, Astrophysics and astroparticle physics, General relativity, Formal aspects of field theory, field theory in curved space, String theory, quantum gravity, gauge/gravity duality.