硬射流的弹性能量损失和纵向离散
Elastic energy loss and longitudinal straggling of a hard jet
摘要：
在共线极限下，研究了大核深度非弹性散射（DIS）产生的喷流所遇到的弹性能量损失。与依赖于介质输运系数$\hat{q}$的（非辐射）横向动量展宽的情况类似，确定了一类介质增强的高扭转算子，这些算子有助于喷流（$q^-$）的前向光锥动量的非辐射损失，并隔离了渐近高$q^-$极限中的领先修正。基于这些算子产品，一个新的传输系数$\hat{e}$的动机，它量化的能量损失，每单位长度的硬射流遇到。这些运营商的产品，然后计算，明确的情况下，一个类似的硬喷流穿越退禁闭夸克胶子等离子体（QGP）的硬热环（HTL）近似。接着是对被光锥动量$q^-$抑制的子领先贡献的评估，其产生纵向"离散"，即，由于通过具有波动色场的介质的布朗传播而引起的光锥动量的轻微变化。
英文摘要：
The elastic energy loss encountered by jets produced in deep-inelastic scattering (DIS) off a large nucleus is studied in the collinear limit. In close analogy to the case of (non-radiative) transverse momentum broadening, which is dependent on the medium transport coefficient $\hat{q}$, a class of medium enhanced higher twist operators which contribute to the non-radiative loss of the forward light-cone momentum of the jet ($q^-$) are identified and the leading correction in the limit of asymptotically high $q^-$ is isolated. Based on these operator products, a new transport coefficient $\hat{e}$ is motivated which quantifies the energy loss per unit length encountered by the hard jet. These operator products are then computed, explicitly, in the case of a similar hard jet traversing a deconfined quark-gluon-plasma (QGP) in the hard-thermal-loop (HTL) approximation. This is followed by an evaluation of sub-leading contributions which are suppressed by the light-cone momentum $q^-$, which yields the longitudinal "straggling" i.e., a slight change in light cone momentum due to the Brownian propagation through a medium with a fluctuating color field.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
