贝叶斯推断改进的CUJET模型中的重夸克能量损失
Heavy quark energy loss in the Bayesian-inference-improved CUJET model
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中文总结 AI 辅助
本研究在贝叶斯推断改进的CUJET模型中计算高横动量重味介子的喷注淬火观测量，验证其与实验数据一致，并计算重夸克扩散系数，支持统一描述轻、重味能量损失，强调色彩磁自由度在QCD禁闭转变区的重要作用。
中文摘要 AI 辅助
我们计算了改进的CUJET模型中高横动量开放重味介子的喷注淬火观测量——核修正因子$R_{AA}$和椭圆各向异性系数$v_2$。在该模型中，强耦合参数以及依赖于温度的色彩磁单极子分数是通过使用来自RHIC和LHC的高$p_T$轻强子$R_{\mathrm{AA}}$和$v_2$测量值进行贝叶斯推断提取的。我们在此工作中表明，这种贝叶斯推断改进的CUJET模型基于相同的后验参数，能够很好地描述现有高$p_T$粲和底强子观测量。相应的重夸克空间扩散参数$2\pi T D_s$也被计算出来，其与当前唯象学和格点QCD约束大致一致。这些结果支持对高$p_T$轻味和重味能量损失的介质修正进行统一描述，并表明在量子色动力学（QCD）的禁闭转变区域附近，色彩磁自由度发挥了重要作用。
英文摘要
We compute jet quenching observables--the nuclear modification factor $R_{AA}$ and elliptic anisotropy coefficient $v_2$--for open-heavy flavor mesons with high transverse momentum in an improved CUJET model, in which the strong coupling parameter as well as the temperature-dependent fraction of chromo-magneto monopoles are extracted through Bayesian inference using high-$p_T$ light-hadron $R_{\mathrm{AA}}$ and $v_2$ measurements from RHIC and the LHC. We show in this work that such a Bayesian-inference-improved CUJET model provides a good description of available high-$p_T$ charm- and bottom-hadron observables based on the same posterior parameters. The corresponding heavy-quark spatial diffusion parameter, $2πT D_s$, is also computed, which is broadly consistent with current phenomenological and lattice-QCD constraints. These results support a universal description for the medium modification of high-$p_T$ light- and heavy-flavor energy loss and indicate an important role played by the chromo-magnetic degrees of freedom near the confinement transition region of quantum chromodynamics (QCD).
发表机构
- Tsinghua University（清华大学）
- Indiana University（印第安纳大学）
机构由 AI 辅助整理，请以论文原文为准。
