发表机构
Variable Energy Cyclotron Centre; Saha Institute of Nuclear Physics; Homi Bhabha National Institute（可变能量回旋加速器中心; 萨哈核物理研究所; 霍米·巴巴国立研究所）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究针对有限重子密度下QGP热光子产生率，首次解析证明了硬软区域间中间动量截断$k_c$的抵消具有截断独立性，解决了相关长期问题，所得结果可推广应用于含$\mu$的QGP时空演化模拟。
AI 中文摘要
我们计算热且致密的夸克胶子等离子体的热光子产生率。此前仅通过数值方法确定了有限重子密度存在时，硬区域与软区域之间中间动量截断$k_c$的相互抵消，而我们在此首次证明，即使存在非零夸克化学势$\mu$，也可解析地证明这种截断独立性。这解决了文献[1]中提及的长期问题。光子率的最终表达式可视为文献[2,3]结果在存在$\mu$时的推广，可直接应用于热且致密QGP介质的时空演化，采用相对论流体动力学实现。
英文摘要
We compute the thermal photon production rate from a hot and dense quark-gluon plasma. While the mutual cancellation of the intermediate momentum cutoff $k_c$ between the hard and soft regimes in the presence of finite baryon density has been previously established only numerically, we demonstrate here, for the first time, that this cutoff independence can be shown analytically even in the presence of a nonzero quark chemical potential $μ$. This resolves a long-standing issue addressed in Ref.[1]. The final expression for the photon rate can be treated as a generalization of the results obtained in Refs.[2,3] in the presence of $μ$ and can be implemented directly in the space-time evolution of a hot and dense QGP medium using relativistic hydrodynamics.
