AI 中文总结
该研究推导了致密核介质中硬夸克轫致辐射光子的能谱，为相对论重离子碰撞的相关唯象学研究提供了可靠输入
AI 中文摘要
我们研究了由致密核介质中重散射引发的硬喷注部分子产生的轫致辐射光子。利用电子与大原子核深度非弹性散射的带电流相互作用道，我们在统一框架下推导了高能重夸克和轻夸克在次领头twist阶下发射的介质诱导光子的能谱。超越共线展开近似后，我们证明光子能谱由传播夸克与介质之间交换的胶子的完整动量分布决定，等价于硬夸克在介质内的微分弹性散射率。用静态德拜屏蔽势建模胶子场，可将光子能谱简化为对交换胶子横动量分布的依赖。本工作为未来相对论重离子碰撞中夸克质量对喷注诱导光子产生影响的唯象学研究提供了更可靠的输入。
英文摘要
We study the bremsstrahlung photon production from a hard jet parton induced by rescattering with a dense nuclear medium. Using the charged current interaction channel of deep inelastic scattering between an electron and a large nucleus, we derive the spectrum of medium-induced photons emitted from high-energy heavy and light quarks at the next-to-leading twist in a unified framework. Going beyond the collinear expansion approximation, we show that the photon spectrum is determined by the full momentum distribution of the gluon exchanged between the propagating quark and the medium, or equivalently, by the differential elastic scattering rate of the hard quark inside the medium. Modeling the gluon field with a static Debye screened potential reduces the photon spectrum to a dependence on the transverse momentum distribution of the exchanged gluon. This work provides a more reliable input for future phenomenological studies of quark mass effects on jet-induced photon production in relativistic heavy-ion collisions.
