论文标题
分解子领先功率的准TMD分布
Factorization for quasi-TMD distributions of sub-leading power
论文作者
论文摘要
准透明摩肌依赖性（QTMD）分布是相等的相关器，可以在晶状体QCD方法中计算。在大型强子的势头方面，QTMD分布通过分解定理以标准TMD分布表示。我们在下一个领先幂（NLP）处得出相应的分解定理，并首次提出了大型子领先幂的一类QTMD分布的分解表达式。 NLP表达式包含TMD分布，Twist-Two，Twist-3和新的晶格特异性非扰动函数。我们指出，可以使用不同momenta-ratio的标准技术来提取Collins-Soper内核中考虑的一些QTMD分布。我们为分解定理的所有元素提供NLO表达式。同样，我们第一次明确证明了NLP TMD分解中增强不变性的恢复。
The quasi-transverse-momentum dependent (qTMD) distributions are equal-time correlators that can be computed within the lattice QCD approach. In the regime of large hadron's momentum, qTMD distributions are expressed in terms of standard TMD distributions via the factorization theorem. We derive the corresponding factorization theorem at the next-leading power (NLP), and, for the first time, we present the factorized expressions for a large class of qTMD distributions of sub-leading power. The NLP expression contains TMD distributions of twist-two, twist-three, and a new lattice-specific nonperturbative function. We point out that some of the qTMD distributions considered in this work can be employed to extract the Collins-Soper kernel using the standard techniques of different-momenta-ratio. We provide NLO expressions for all the elements of the factorization theorem. Also, for the first time, we explicitly demonstrate the restoration of boost invariance in NLP TMD factorization.
