Langevin dynamics of heavy quarks in a soft-hard factorized approach

被引：3
作者：
Li, Shuang [1 ,2 ]
Sun, Fei [1 ]
Xie, Wei [1 ]
Xiong, Wei [1 ]
机构：
[1] China Three Gorges Univ, Coll Sci, Yichang 443002, Peoples R China
[2] Cent China Normal Univ, Key Lab Quark & Lepton Phys MOE, Wuhan 430079, Peoples R China
来源：
EUROPEAN PHYSICAL JOURNAL C | 2021年 / 81卷 / 06期
基金：
美国国家科学基金会;
关键词：
QUANTUM CHROMODYNAMICS; DIFFUSION; HOT; COLLISIONS; MATTER;
D O I：
10.1140/epjc/s10052-021-09339-7
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
By utilizing a soft-hard factorized model, which combines a thermal perturbative description of soft scatterings and a perturbative QCD-based calculation for hard collisions, we study the energy and temperature dependence of the heavy quark diffusion coefficients in Langevin dynamics. The adjustable parameters are fixed from the comprehensive model-data comparison. We find that a small value of the spatial diffusion coefficient at transition temperature is preferred by data 2 pi TDs(Tc)similar or equal to 6. With the parameter-optimized model, we are able to describe simultaneously the prompt D0RAA and v2 data at pT <= 8 GeV in Pb-Pb collisions at <mml:msqrt>sNN</mml:msqrt>=2.76 and <mml:msqrt>sNN</mml:msqrt>=5.02 TeV. We also make predictions for non-prompt D0 meson for future experimental tests down to the low momentum region.
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页数：14
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