论文标题
CGC中三种喷气式的光生效：Gluon TMD和稀数极限
Photoproduction of three jets in the CGC: gluon TMDs and dilute limit
论文作者
论文摘要
我们研究了颜色玻璃冷凝物（CGC）有效理论中的$γa\至q \ bar {q} g+x $。获得横截面后，我们考虑了两个运动学限制，这些限制包含在我们的结果中。在所谓的相关极限中，相对于单个横向动量，这三个传出粒子的横向动量的矢量总和很小。然后，横截面大大简化，可以以分解形式写入，对未偏振和线性偏振的Weizsäcker-Williams横向动量依赖性Gluon分布函数（GLUON TMD）敏感。我们认为的CGC横截面的第二个极限是稀释极限，我们在执行弱场扩张后获得了稀数极限。我们恢复典型的线性优势表达式，涉及单个未集成的Gluon分布函数。使用对TMD的小$ x $ QCD演变的数值模拟，我们研究了相关限制中横截面的速度依赖性。
We study the process $γA \to q \bar{q} g+X$ in the Color Glass Condensate (CGC) effective theory. After obtaining the cross section, we consider two kinematic limits which are encompassed in our result. In the so-called correlation limit, the vector sum of the transverse momenta of the three outgoing particles is small with respect to the individual transverse momenta; the cross section then simplifies considerably and can be written in a factorized form, sensitive to both the unpolarized and linearly-polarized Weizsäcker-Williams transverse momentum dependent gluon distribution function (gluon TMD). The second limit of the CGC cross section that we consider is the dilute limit, which we obtain after performing a weak-field expansion; we recover a typical linear-regime expression, involving a single unintegrated gluon distribution function. Using numerical simulations of the small-$x$ QCD evolution of the TMDs, we investigate the rapidity dependence of the cross section in the correlation limit.
