论文标题

T-ODD Gluon TMD的能源演变,小$ x $

Energy evolution of T-odd gluon TMDs at small $x$

论文作者

Boer, Daniël, Hagiwara, Yoshikazu, Zhou, Jian, Zhou, Ya-jin

论文摘要

我们研究了横向极化核子内的三个领先扭转偶极型T-ODD gluon TMD的能量或TMD演变,这些核子在小$ x $时都动态起源于旋转依赖性的odderon。他们的能量依赖性为研究小$ x $区域的极化依赖性TMD演变提供了独特的机会,在小$ x $区域中,分布在树水平上的归一化常数相同。我们进一步建议通过在RHIC的偏光质子蛋白碰撞中虚拟光子喷射中的方位角不对称研究它们的进化。我们向不对称的模型预测作为大型射流或光子横向动量的函数和$ q^2 $的函数,这些函数在此过程中设定了硬尺度。

We study the energy or TMD evolution of the three leading twist dipole type T-odd gluon TMDs inside a transversely polarized nucleon, all of which at small $x$ dynamically originate from the spin dependent odderon. Their energy dependence presents a unique opportunity to study the polarization dependent TMD evolution in the small-$x$ region, where the distributions are identical up to a normalization constant at tree level. We further propose to study their evolution via azimuthal asymmetries in virtual photon-jet production in polarized proton-proton collisions at RHIC. We present model predictions for the asymmetries as functions of the large jet or photon transverse momentum and $Q^2$ which set the hard scales in this process.

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